mirror of
https://github.com/python/cpython.git
synced 2025-11-04 03:44:55 +00:00
57c471a688
Switch more _Py_IsImmortal(...) assertions to _Py_IsImmortalLoose(...) The remaining calls to _Py_IsImmortal are in free-threaded-only code, initialization of core objects, tests, and guards that fall back to code that works with mortal objects.
3923 lines
105 KiB
C
3923 lines
105 KiB
C
#ifndef Py_BUILD_CORE_BUILTIN
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# define Py_BUILD_CORE_MODULE 1
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#endif
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#include "Python.h"
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#include "pycore_critical_section.h" // Py_BEGIN_CRITICAL_SECTION_MUT()
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#include "pycore_dict.h" // _PyDict_GetItem_KnownHash()
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#include "pycore_freelist.h" // _Py_FREELIST_POP()
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#include "pycore_modsupport.h" // _PyArg_CheckPositional()
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#include "pycore_moduleobject.h" // _PyModule_GetState()
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#include "pycore_object.h" // _Py_SetImmortalUntracked
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#include "pycore_pyerrors.h" // _PyErr_ClearExcState()
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#include "pycore_pylifecycle.h" // _Py_IsInterpreterFinalizing()
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#include "pycore_pystate.h" // _PyThreadState_GET()
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#include "pycore_runtime_init.h" // _Py_ID()
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#include <stddef.h> // offsetof()
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/*[clinic input]
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module _asyncio
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=8fd17862aa989c69]*/
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typedef enum {
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STATE_PENDING,
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STATE_CANCELLED,
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STATE_FINISHED
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} fut_state;
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#define FutureObj_HEAD(prefix) \
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PyObject_HEAD \
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PyObject *prefix##_loop; \
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PyObject *prefix##_callback0; \
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PyObject *prefix##_context0; \
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PyObject *prefix##_callbacks; \
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PyObject *prefix##_exception; \
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PyObject *prefix##_exception_tb; \
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PyObject *prefix##_result; \
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PyObject *prefix##_source_tb; \
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PyObject *prefix##_cancel_msg; \
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PyObject *prefix##_cancelled_exc; \
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fut_state prefix##_state; \
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/* These bitfields need to be at the end of the struct
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so that these and bitfields from TaskObj are contiguous.
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*/ \
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unsigned prefix##_log_tb: 1; \
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unsigned prefix##_blocking: 1;
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typedef struct {
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FutureObj_HEAD(fut)
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} FutureObj;
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typedef struct TaskObj {
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FutureObj_HEAD(task)
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unsigned task_must_cancel: 1;
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unsigned task_log_destroy_pending: 1;
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int task_num_cancels_requested;
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PyObject *task_fut_waiter;
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PyObject *task_coro;
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PyObject *task_name;
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PyObject *task_context;
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struct TaskObj *next;
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struct TaskObj *prev;
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} TaskObj;
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typedef struct {
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PyObject_HEAD
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TaskObj *sw_task;
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PyObject *sw_arg;
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} TaskStepMethWrapper;
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#define Future_CheckExact(state, obj) Py_IS_TYPE(obj, state->FutureType)
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#define Task_CheckExact(state, obj) Py_IS_TYPE(obj, state->TaskType)
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#define Future_Check(state, obj) PyObject_TypeCheck(obj, state->FutureType)
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#define Task_Check(state, obj) PyObject_TypeCheck(obj, state->TaskType)
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#ifdef Py_GIL_DISABLED
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# define ASYNCIO_STATE_LOCK(state) Py_BEGIN_CRITICAL_SECTION_MUT(&state->mutex)
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# define ASYNCIO_STATE_UNLOCK(state) Py_END_CRITICAL_SECTION()
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#else
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# define ASYNCIO_STATE_LOCK(state) ((void)state)
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# define ASYNCIO_STATE_UNLOCK(state) ((void)state)
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#endif
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typedef struct futureiterobject futureiterobject;
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/* State of the _asyncio module */
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typedef struct {
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#ifdef Py_GIL_DISABLED
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PyMutex mutex;
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#endif
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PyTypeObject *FutureIterType;
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PyTypeObject *TaskStepMethWrapper_Type;
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PyTypeObject *FutureType;
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PyTypeObject *TaskType;
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PyObject *asyncio_mod;
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PyObject *context_kwname;
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/* Dictionary containing tasks that are currently active in
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all running event loops. {EventLoop: Task} */
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PyObject *current_tasks;
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/* WeakSet containing scheduled 3rd party tasks which don't
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inherit from native asyncio.Task */
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PyObject *non_asyncio_tasks;
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/* Set containing all eagerly executing tasks. */
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PyObject *eager_tasks;
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/* An isinstance type cache for the 'is_coroutine()' function. */
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PyObject *iscoroutine_typecache;
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/* Imports from asyncio.events. */
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PyObject *asyncio_get_event_loop_policy;
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/* Imports from asyncio.base_futures. */
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PyObject *asyncio_future_repr_func;
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/* Imports from asyncio.exceptions. */
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PyObject *asyncio_CancelledError;
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PyObject *asyncio_InvalidStateError;
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/* Imports from asyncio.base_tasks. */
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PyObject *asyncio_task_get_stack_func;
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PyObject *asyncio_task_print_stack_func;
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PyObject *asyncio_task_repr_func;
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/* Imports from asyncio.coroutines. */
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PyObject *asyncio_iscoroutine_func;
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/* Imports from traceback. */
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PyObject *traceback_extract_stack;
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/* Counter for autogenerated Task names */
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uint64_t task_name_counter;
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/* Linked-list of all tasks which are instances of asyncio.Task or subclasses
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of it. Third party tasks implementations which don't inherit from
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asyncio.Task are tracked separately using the 'non_asyncio_tasks' WeakSet.
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`tail` is used as a sentinel to mark the end of the linked-list. It avoids one
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branch in checking for empty list when adding a new task, the list is
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initialized with `head` pointing to `tail` to mark an empty list.
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Invariants:
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* When the list is empty:
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- asyncio_tasks.head == &asyncio_tasks.tail
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- asyncio_tasks.head->prev == NULL
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- asyncio_tasks.head->next == NULL
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* After adding the first task 'task1':
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- asyncio_tasks.head == task1
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- task1->next == &asyncio_tasks.tail
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- task1->prev == NULL
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- asyncio_tasks.tail.prev == task1
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* After adding a second task 'task2':
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- asyncio_tasks.head == task2
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- task2->next == task1
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- task2->prev == NULL
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- task1->prev == task2
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- asyncio_tasks.tail.prev == task1
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* After removing task 'task1':
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- asyncio_tasks.head == task2
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- task2->next == &asyncio_tasks.tail
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- task2->prev == NULL
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- asyncio_tasks.tail.prev == task2
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* After removing task 'task2', the list is empty:
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- asyncio_tasks.head == &asyncio_tasks.tail
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- asyncio_tasks.head->prev == NULL
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- asyncio_tasks.tail.prev == NULL
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- asyncio_tasks.tail.next == NULL
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*/
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struct {
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TaskObj tail;
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TaskObj *head;
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} asyncio_tasks;
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} asyncio_state;
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static inline asyncio_state *
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get_asyncio_state(PyObject *mod)
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{
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asyncio_state *state = _PyModule_GetState(mod);
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assert(state != NULL);
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return state;
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}
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static inline asyncio_state *
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get_asyncio_state_by_cls(PyTypeObject *cls)
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{
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asyncio_state *state = (asyncio_state *)_PyType_GetModuleState(cls);
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assert(state != NULL);
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return state;
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}
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static struct PyModuleDef _asynciomodule;
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static inline asyncio_state *
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get_asyncio_state_by_def(PyObject *self)
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{
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PyTypeObject *tp = Py_TYPE(self);
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PyObject *mod = PyType_GetModuleByDef(tp, &_asynciomodule);
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assert(mod != NULL);
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return get_asyncio_state(mod);
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}
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#include "clinic/_asynciomodule.c.h"
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/*[clinic input]
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class _asyncio.Future "FutureObj *" "&Future_Type"
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=00d3e4abca711e0f]*/
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/* Get FutureIter from Future */
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static PyObject * future_new_iter(PyObject *);
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static PyObject *
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task_step_handle_result_impl(asyncio_state *state, TaskObj *task, PyObject *result);
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static int
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_is_coroutine(asyncio_state *state, PyObject *coro)
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{
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/* 'coro' is not a native coroutine, call asyncio.iscoroutine()
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to check if it's another coroutine flavour.
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Do this check after 'future_init()'; in case we need to raise
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an error, __del__ needs a properly initialized object.
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*/
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PyObject *res = PyObject_CallOneArg(state->asyncio_iscoroutine_func, coro);
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if (res == NULL) {
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return -1;
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}
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int is_res_true = PyObject_IsTrue(res);
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Py_DECREF(res);
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if (is_res_true <= 0) {
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return is_res_true;
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}
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if (PySet_GET_SIZE(state->iscoroutine_typecache) < 100) {
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/* Just in case we don't want to cache more than 100
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positive types. That shouldn't ever happen, unless
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someone stressing the system on purpose.
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*/
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if (PySet_Add(state->iscoroutine_typecache, (PyObject*) Py_TYPE(coro))) {
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return -1;
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}
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}
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return 1;
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}
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static inline int
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is_coroutine(asyncio_state *state, PyObject *coro)
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{
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if (PyCoro_CheckExact(coro)) {
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return 1;
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}
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/* Check if `type(coro)` is in the cache.
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Caching makes is_coroutine() function almost as fast as
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PyCoro_CheckExact() for non-native coroutine-like objects
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(like coroutines compiled with Cython).
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asyncio.iscoroutine() has its own type caching mechanism.
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This cache allows us to avoid the cost of even calling
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a pure-Python function in 99.9% cases.
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*/
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int has_it = PySet_Contains(
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state->iscoroutine_typecache, (PyObject*) Py_TYPE(coro));
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if (has_it == 0) {
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/* type(coro) is not in iscoroutine_typecache */
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return _is_coroutine(state, coro);
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}
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/* either an error has occurred or
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type(coro) is in iscoroutine_typecache
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*/
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return has_it;
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}
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static PyObject *
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get_future_loop(asyncio_state *state, PyObject *fut)
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{
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/* Implementation of `asyncio.futures._get_loop` */
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PyObject *getloop;
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if (Future_CheckExact(state, fut) || Task_CheckExact(state, fut)) {
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PyObject *loop = ((FutureObj *)fut)->fut_loop;
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return Py_NewRef(loop);
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}
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if (PyObject_GetOptionalAttr(fut, &_Py_ID(get_loop), &getloop) < 0) {
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return NULL;
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}
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if (getloop != NULL) {
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PyObject *res = PyObject_CallNoArgs(getloop);
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Py_DECREF(getloop);
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return res;
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}
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return PyObject_GetAttr(fut, &_Py_ID(_loop));
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}
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static PyObject *
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get_event_loop(asyncio_state *state)
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{
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PyObject *loop;
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PyObject *policy;
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_PyThreadStateImpl *ts = (_PyThreadStateImpl *)_PyThreadState_GET();
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loop = Py_XNewRef(ts->asyncio_running_loop);
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if (loop != NULL) {
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return loop;
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}
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policy = PyObject_CallNoArgs(state->asyncio_get_event_loop_policy);
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if (policy == NULL) {
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return NULL;
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}
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loop = PyObject_CallMethodNoArgs(policy, &_Py_ID(get_event_loop));
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Py_DECREF(policy);
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return loop;
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}
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static int
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call_soon(asyncio_state *state, PyObject *loop, PyObject *func, PyObject *arg,
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PyObject *ctx)
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{
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PyObject *handle;
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if (ctx == NULL) {
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PyObject *stack[] = {loop, func, arg};
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size_t nargsf = 3 | PY_VECTORCALL_ARGUMENTS_OFFSET;
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handle = PyObject_VectorcallMethod(&_Py_ID(call_soon), stack, nargsf, NULL);
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}
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else {
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/* All refs in 'stack' are borrowed. */
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PyObject *stack[4];
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size_t nargs = 2;
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stack[0] = loop;
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stack[1] = func;
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if (arg != NULL) {
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stack[2] = arg;
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nargs++;
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}
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stack[nargs] = (PyObject *)ctx;
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size_t nargsf = nargs | PY_VECTORCALL_ARGUMENTS_OFFSET;
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handle = PyObject_VectorcallMethod(&_Py_ID(call_soon), stack, nargsf,
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state->context_kwname);
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}
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if (handle == NULL) {
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return -1;
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}
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Py_DECREF(handle);
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return 0;
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}
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static inline int
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future_is_alive(FutureObj *fut)
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{
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return fut->fut_loop != NULL;
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}
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static inline int
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future_ensure_alive(FutureObj *fut)
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{
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if (!future_is_alive(fut)) {
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PyErr_SetString(PyExc_RuntimeError,
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"Future object is not initialized.");
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return -1;
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}
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return 0;
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}
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#define ENSURE_FUTURE_ALIVE(state, fut) \
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do { \
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assert(Future_Check(state, fut) || Task_Check(state, fut)); \
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(void)state; \
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if (future_ensure_alive((FutureObj*)fut)) { \
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return NULL; \
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} \
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} while(0);
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static int
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future_schedule_callbacks(asyncio_state *state, FutureObj *fut)
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{
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Py_ssize_t len;
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Py_ssize_t i;
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if (fut->fut_callback0 != NULL) {
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/* There's a 1st callback */
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int ret = call_soon(state,
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fut->fut_loop, fut->fut_callback0,
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(PyObject *)fut, fut->fut_context0);
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Py_CLEAR(fut->fut_callback0);
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Py_CLEAR(fut->fut_context0);
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if (ret) {
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/* If an error occurs in pure-Python implementation,
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all callbacks are cleared. */
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Py_CLEAR(fut->fut_callbacks);
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return ret;
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}
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/* we called the first callback, now try calling
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callbacks from the 'fut_callbacks' list. */
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}
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if (fut->fut_callbacks == NULL) {
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/* No more callbacks, return. */
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return 0;
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}
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len = PyList_GET_SIZE(fut->fut_callbacks);
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if (len == 0) {
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/* The list of callbacks was empty; clear it and return. */
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Py_CLEAR(fut->fut_callbacks);
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return 0;
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}
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for (i = 0; i < len; i++) {
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PyObject *cb_tup = PyList_GET_ITEM(fut->fut_callbacks, i);
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PyObject *cb = PyTuple_GET_ITEM(cb_tup, 0);
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PyObject *ctx = PyTuple_GET_ITEM(cb_tup, 1);
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if (call_soon(state, fut->fut_loop, cb, (PyObject *)fut, ctx)) {
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/* If an error occurs in pure-Python implementation,
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all callbacks are cleared. */
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Py_CLEAR(fut->fut_callbacks);
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return -1;
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}
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}
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Py_CLEAR(fut->fut_callbacks);
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return 0;
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}
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static int
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future_init(FutureObj *fut, PyObject *loop)
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{
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PyObject *res;
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int is_true;
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Py_CLEAR(fut->fut_loop);
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Py_CLEAR(fut->fut_callback0);
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Py_CLEAR(fut->fut_context0);
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Py_CLEAR(fut->fut_callbacks);
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Py_CLEAR(fut->fut_result);
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Py_CLEAR(fut->fut_exception);
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Py_CLEAR(fut->fut_exception_tb);
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Py_CLEAR(fut->fut_source_tb);
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Py_CLEAR(fut->fut_cancel_msg);
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Py_CLEAR(fut->fut_cancelled_exc);
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fut->fut_state = STATE_PENDING;
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fut->fut_log_tb = 0;
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fut->fut_blocking = 0;
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if (loop == Py_None) {
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asyncio_state *state = get_asyncio_state_by_def((PyObject *)fut);
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loop = get_event_loop(state);
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if (loop == NULL) {
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return -1;
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}
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}
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else {
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Py_INCREF(loop);
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}
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fut->fut_loop = loop;
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res = PyObject_CallMethodNoArgs(fut->fut_loop, &_Py_ID(get_debug));
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if (res == NULL) {
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return -1;
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}
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is_true = PyObject_IsTrue(res);
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Py_DECREF(res);
|
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if (is_true < 0) {
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return -1;
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}
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if (is_true && !_Py_IsInterpreterFinalizing(_PyInterpreterState_GET())) {
|
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/* Only try to capture the traceback if the interpreter is not being
|
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finalized. The original motivation to add a `Py_IsFinalizing()`
|
|
call was to prevent SIGSEGV when a Future is created in a __del__
|
|
method, which is called during the interpreter shutdown and the
|
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traceback module is already unloaded.
|
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*/
|
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asyncio_state *state = get_asyncio_state_by_def((PyObject *)fut);
|
|
fut->fut_source_tb = PyObject_CallNoArgs(state->traceback_extract_stack);
|
|
if (fut->fut_source_tb == NULL) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
future_set_result(asyncio_state *state, FutureObj *fut, PyObject *res)
|
|
{
|
|
if (future_ensure_alive(fut)) {
|
|
return NULL;
|
|
}
|
|
|
|
if (fut->fut_state != STATE_PENDING) {
|
|
PyErr_SetString(state->asyncio_InvalidStateError, "invalid state");
|
|
return NULL;
|
|
}
|
|
|
|
assert(!fut->fut_result);
|
|
fut->fut_result = Py_NewRef(res);
|
|
fut->fut_state = STATE_FINISHED;
|
|
|
|
if (future_schedule_callbacks(state, fut) == -1) {
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static PyObject *
|
|
future_set_exception(asyncio_state *state, FutureObj *fut, PyObject *exc)
|
|
{
|
|
PyObject *exc_val = NULL;
|
|
|
|
if (fut->fut_state != STATE_PENDING) {
|
|
PyErr_SetString(state->asyncio_InvalidStateError, "invalid state");
|
|
return NULL;
|
|
}
|
|
|
|
if (PyExceptionClass_Check(exc)) {
|
|
exc_val = PyObject_CallNoArgs(exc);
|
|
if (exc_val == NULL) {
|
|
return NULL;
|
|
}
|
|
if (fut->fut_state != STATE_PENDING) {
|
|
Py_DECREF(exc_val);
|
|
PyErr_SetString(state->asyncio_InvalidStateError, "invalid state");
|
|
return NULL;
|
|
}
|
|
}
|
|
else {
|
|
exc_val = Py_NewRef(exc);
|
|
}
|
|
if (!PyExceptionInstance_Check(exc_val)) {
|
|
Py_DECREF(exc_val);
|
|
PyErr_SetString(PyExc_TypeError, "invalid exception object");
|
|
return NULL;
|
|
}
|
|
if (PyErr_GivenExceptionMatches(exc_val, PyExc_StopIteration)) {
|
|
const char *msg = "StopIteration interacts badly with "
|
|
"generators and cannot be raised into a "
|
|
"Future";
|
|
PyObject *message = PyUnicode_FromString(msg);
|
|
if (message == NULL) {
|
|
Py_DECREF(exc_val);
|
|
return NULL;
|
|
}
|
|
PyObject *err = PyObject_CallOneArg(PyExc_RuntimeError, message);
|
|
Py_DECREF(message);
|
|
if (err == NULL) {
|
|
Py_DECREF(exc_val);
|
|
return NULL;
|
|
}
|
|
assert(PyExceptionInstance_Check(err));
|
|
|
|
PyException_SetCause(err, Py_NewRef(exc_val));
|
|
PyException_SetContext(err, Py_NewRef(exc_val));
|
|
Py_DECREF(exc_val);
|
|
exc_val = err;
|
|
}
|
|
|
|
assert(!fut->fut_exception);
|
|
assert(!fut->fut_exception_tb);
|
|
fut->fut_exception = exc_val;
|
|
fut->fut_exception_tb = PyException_GetTraceback(exc_val);
|
|
fut->fut_state = STATE_FINISHED;
|
|
|
|
if (future_schedule_callbacks(state, fut) == -1) {
|
|
return NULL;
|
|
}
|
|
|
|
fut->fut_log_tb = 1;
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static PyObject *
|
|
create_cancelled_error(asyncio_state *state, FutureObj *fut)
|
|
{
|
|
PyObject *exc;
|
|
if (fut->fut_cancelled_exc != NULL) {
|
|
/* transfer ownership */
|
|
exc = fut->fut_cancelled_exc;
|
|
fut->fut_cancelled_exc = NULL;
|
|
return exc;
|
|
}
|
|
PyObject *msg = fut->fut_cancel_msg;
|
|
if (msg == NULL || msg == Py_None) {
|
|
exc = PyObject_CallNoArgs(state->asyncio_CancelledError);
|
|
} else {
|
|
exc = PyObject_CallOneArg(state->asyncio_CancelledError, msg);
|
|
}
|
|
return exc;
|
|
}
|
|
|
|
static void
|
|
future_set_cancelled_error(asyncio_state *state, FutureObj *fut)
|
|
{
|
|
PyObject *exc = create_cancelled_error(state, fut);
|
|
if (exc == NULL) {
|
|
return;
|
|
}
|
|
PyErr_SetObject(state->asyncio_CancelledError, exc);
|
|
Py_DECREF(exc);
|
|
}
|
|
|
|
static int
|
|
future_get_result(asyncio_state *state, FutureObj *fut, PyObject **result)
|
|
{
|
|
if (fut->fut_state == STATE_CANCELLED) {
|
|
future_set_cancelled_error(state, fut);
|
|
return -1;
|
|
}
|
|
|
|
if (fut->fut_state != STATE_FINISHED) {
|
|
PyErr_SetString(state->asyncio_InvalidStateError,
|
|
"Result is not set.");
|
|
return -1;
|
|
}
|
|
|
|
fut->fut_log_tb = 0;
|
|
if (fut->fut_exception != NULL) {
|
|
PyObject *tb = fut->fut_exception_tb;
|
|
if (tb == NULL) {
|
|
tb = Py_None;
|
|
}
|
|
if (PyException_SetTraceback(fut->fut_exception, tb) < 0) {
|
|
return -1;
|
|
}
|
|
*result = Py_NewRef(fut->fut_exception);
|
|
Py_CLEAR(fut->fut_exception_tb);
|
|
return 1;
|
|
}
|
|
|
|
*result = Py_NewRef(fut->fut_result);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
future_add_done_callback(asyncio_state *state, FutureObj *fut, PyObject *arg,
|
|
PyObject *ctx)
|
|
{
|
|
if (!future_is_alive(fut)) {
|
|
PyErr_SetString(PyExc_RuntimeError, "uninitialized Future object");
|
|
return NULL;
|
|
}
|
|
|
|
if (fut->fut_state != STATE_PENDING) {
|
|
/* The future is done/cancelled, so schedule the callback
|
|
right away. */
|
|
if (call_soon(state, fut->fut_loop, arg, (PyObject*) fut, ctx)) {
|
|
return NULL;
|
|
}
|
|
}
|
|
else {
|
|
/* The future is pending, add a callback.
|
|
|
|
Callbacks in the future object are stored as follows:
|
|
|
|
callback0 -- a pointer to the first callback
|
|
callbacks -- a list of 2nd, 3rd, ... callbacks
|
|
|
|
Invariants:
|
|
|
|
* callbacks != NULL:
|
|
There are some callbacks in in the list. Just
|
|
add the new callback to it.
|
|
|
|
* callbacks == NULL and callback0 == NULL:
|
|
This is the first callback. Set it to callback0.
|
|
|
|
* callbacks == NULL and callback0 != NULL:
|
|
This is a second callback. Initialize callbacks
|
|
with a new list and add the new callback to it.
|
|
*/
|
|
|
|
if (fut->fut_callbacks == NULL && fut->fut_callback0 == NULL) {
|
|
fut->fut_callback0 = Py_NewRef(arg);
|
|
fut->fut_context0 = Py_NewRef(ctx);
|
|
}
|
|
else {
|
|
PyObject *tup = PyTuple_New(2);
|
|
if (tup == NULL) {
|
|
return NULL;
|
|
}
|
|
Py_INCREF(arg);
|
|
PyTuple_SET_ITEM(tup, 0, arg);
|
|
Py_INCREF(ctx);
|
|
PyTuple_SET_ITEM(tup, 1, (PyObject *)ctx);
|
|
|
|
if (fut->fut_callbacks != NULL) {
|
|
int err = PyList_Append(fut->fut_callbacks, tup);
|
|
if (err) {
|
|
Py_DECREF(tup);
|
|
return NULL;
|
|
}
|
|
Py_DECREF(tup);
|
|
}
|
|
else {
|
|
fut->fut_callbacks = PyList_New(1);
|
|
if (fut->fut_callbacks == NULL) {
|
|
Py_DECREF(tup);
|
|
return NULL;
|
|
}
|
|
|
|
PyList_SET_ITEM(fut->fut_callbacks, 0, tup); /* borrow */
|
|
}
|
|
}
|
|
}
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static PyObject *
|
|
future_cancel(asyncio_state *state, FutureObj *fut, PyObject *msg)
|
|
{
|
|
fut->fut_log_tb = 0;
|
|
|
|
if (fut->fut_state != STATE_PENDING) {
|
|
Py_RETURN_FALSE;
|
|
}
|
|
fut->fut_state = STATE_CANCELLED;
|
|
|
|
Py_XINCREF(msg);
|
|
Py_XSETREF(fut->fut_cancel_msg, msg);
|
|
|
|
if (future_schedule_callbacks(state, fut) == -1) {
|
|
return NULL;
|
|
}
|
|
|
|
Py_RETURN_TRUE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.__init__
|
|
|
|
*
|
|
loop: object = None
|
|
|
|
This class is *almost* compatible with concurrent.futures.Future.
|
|
|
|
Differences:
|
|
|
|
- result() and exception() do not take a timeout argument and
|
|
raise an exception when the future isn't done yet.
|
|
|
|
- Callbacks registered with add_done_callback() are always called
|
|
via the event loop's call_soon_threadsafe().
|
|
|
|
- This class is not compatible with the wait() and as_completed()
|
|
methods in the concurrent.futures package.
|
|
[clinic start generated code]*/
|
|
|
|
static int
|
|
_asyncio_Future___init___impl(FutureObj *self, PyObject *loop)
|
|
/*[clinic end generated code: output=9ed75799eaccb5d6 input=89af317082bc0bf8]*/
|
|
|
|
{
|
|
return future_init(self, loop);
|
|
}
|
|
|
|
static int
|
|
FutureObj_clear(FutureObj *fut)
|
|
{
|
|
Py_CLEAR(fut->fut_loop);
|
|
Py_CLEAR(fut->fut_callback0);
|
|
Py_CLEAR(fut->fut_context0);
|
|
Py_CLEAR(fut->fut_callbacks);
|
|
Py_CLEAR(fut->fut_result);
|
|
Py_CLEAR(fut->fut_exception);
|
|
Py_CLEAR(fut->fut_exception_tb);
|
|
Py_CLEAR(fut->fut_source_tb);
|
|
Py_CLEAR(fut->fut_cancel_msg);
|
|
Py_CLEAR(fut->fut_cancelled_exc);
|
|
PyObject_ClearManagedDict((PyObject *)fut);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
FutureObj_traverse(FutureObj *fut, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(Py_TYPE(fut));
|
|
Py_VISIT(fut->fut_loop);
|
|
Py_VISIT(fut->fut_callback0);
|
|
Py_VISIT(fut->fut_context0);
|
|
Py_VISIT(fut->fut_callbacks);
|
|
Py_VISIT(fut->fut_result);
|
|
Py_VISIT(fut->fut_exception);
|
|
Py_VISIT(fut->fut_exception_tb);
|
|
Py_VISIT(fut->fut_source_tb);
|
|
Py_VISIT(fut->fut_cancel_msg);
|
|
Py_VISIT(fut->fut_cancelled_exc);
|
|
PyObject_VisitManagedDict((PyObject *)fut, visit, arg);
|
|
return 0;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.result
|
|
|
|
Return the result this future represents.
|
|
|
|
If the future has been cancelled, raises CancelledError. If the
|
|
future's result isn't yet available, raises InvalidStateError. If
|
|
the future is done and has an exception set, this exception is raised.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future_result_impl(FutureObj *self)
|
|
/*[clinic end generated code: output=f35f940936a4b1e5 input=49ecf9cf5ec50dc5]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)self);
|
|
PyObject *result;
|
|
|
|
if (!future_is_alive(self)) {
|
|
PyErr_SetString(state->asyncio_InvalidStateError,
|
|
"Future object is not initialized.");
|
|
return NULL;
|
|
}
|
|
|
|
int res = future_get_result(state, self, &result);
|
|
|
|
if (res == -1) {
|
|
return NULL;
|
|
}
|
|
|
|
if (res == 0) {
|
|
return result;
|
|
}
|
|
|
|
assert(res == 1);
|
|
|
|
PyErr_SetObject(PyExceptionInstance_Class(result), result);
|
|
Py_DECREF(result);
|
|
return NULL;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.exception
|
|
|
|
cls: defining_class
|
|
/
|
|
|
|
Return the exception that was set on this future.
|
|
|
|
The exception (or None if no exception was set) is returned only if
|
|
the future is done. If the future has been cancelled, raises
|
|
CancelledError. If the future isn't done yet, raises
|
|
InvalidStateError.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future_exception_impl(FutureObj *self, PyTypeObject *cls)
|
|
/*[clinic end generated code: output=ce75576b187c905b input=3faf15c22acdb60d]*/
|
|
{
|
|
if (!future_is_alive(self)) {
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
PyErr_SetString(state->asyncio_InvalidStateError,
|
|
"Future object is not initialized.");
|
|
return NULL;
|
|
}
|
|
|
|
if (self->fut_state == STATE_CANCELLED) {
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
future_set_cancelled_error(state, self);
|
|
return NULL;
|
|
}
|
|
|
|
if (self->fut_state != STATE_FINISHED) {
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
PyErr_SetString(state->asyncio_InvalidStateError,
|
|
"Exception is not set.");
|
|
return NULL;
|
|
}
|
|
|
|
if (self->fut_exception != NULL) {
|
|
self->fut_log_tb = 0;
|
|
return Py_NewRef(self->fut_exception);
|
|
}
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.set_result
|
|
|
|
cls: defining_class
|
|
result: object
|
|
/
|
|
|
|
Mark the future done and set its result.
|
|
|
|
If the future is already done when this method is called, raises
|
|
InvalidStateError.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future_set_result_impl(FutureObj *self, PyTypeObject *cls,
|
|
PyObject *result)
|
|
/*[clinic end generated code: output=99afbbe78f99c32d input=d5a41c1e353acc2e]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
ENSURE_FUTURE_ALIVE(state, self)
|
|
return future_set_result(state, self, result);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.set_exception
|
|
|
|
cls: defining_class
|
|
exception: object
|
|
/
|
|
|
|
Mark the future done and set an exception.
|
|
|
|
If the future is already done when this method is called, raises
|
|
InvalidStateError.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future_set_exception_impl(FutureObj *self, PyTypeObject *cls,
|
|
PyObject *exception)
|
|
/*[clinic end generated code: output=0a5e8b5a52f058d6 input=a245cd49d3df939b]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
ENSURE_FUTURE_ALIVE(state, self)
|
|
return future_set_exception(state, self, exception);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.add_done_callback
|
|
|
|
cls: defining_class
|
|
fn: object
|
|
/
|
|
*
|
|
context: object = NULL
|
|
|
|
Add a callback to be run when the future becomes done.
|
|
|
|
The callback is called with a single argument - the future object. If
|
|
the future is already done when this is called, the callback is
|
|
scheduled with call_soon.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future_add_done_callback_impl(FutureObj *self, PyTypeObject *cls,
|
|
PyObject *fn, PyObject *context)
|
|
/*[clinic end generated code: output=922e9a4cbd601167 input=599261c521458cc2]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
if (context == NULL) {
|
|
context = PyContext_CopyCurrent();
|
|
if (context == NULL) {
|
|
return NULL;
|
|
}
|
|
PyObject *res = future_add_done_callback(state, self, fn, context);
|
|
Py_DECREF(context);
|
|
return res;
|
|
}
|
|
return future_add_done_callback(state, self, fn, context);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.remove_done_callback
|
|
|
|
cls: defining_class
|
|
fn: object
|
|
/
|
|
|
|
Remove all instances of a callback from the "call when done" list.
|
|
|
|
Returns the number of callbacks removed.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future_remove_done_callback_impl(FutureObj *self, PyTypeObject *cls,
|
|
PyObject *fn)
|
|
/*[clinic end generated code: output=2da35ccabfe41b98 input=c7518709b86fc747]*/
|
|
{
|
|
PyObject *newlist;
|
|
Py_ssize_t len, i, j=0;
|
|
Py_ssize_t cleared_callback0 = 0;
|
|
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
ENSURE_FUTURE_ALIVE(state, self)
|
|
|
|
if (self->fut_callback0 != NULL) {
|
|
int cmp = PyObject_RichCompareBool(self->fut_callback0, fn, Py_EQ);
|
|
if (cmp == -1) {
|
|
return NULL;
|
|
}
|
|
if (cmp == 1) {
|
|
/* callback0 == fn */
|
|
Py_CLEAR(self->fut_callback0);
|
|
Py_CLEAR(self->fut_context0);
|
|
cleared_callback0 = 1;
|
|
}
|
|
}
|
|
|
|
if (self->fut_callbacks == NULL) {
|
|
return PyLong_FromSsize_t(cleared_callback0);
|
|
}
|
|
|
|
len = PyList_GET_SIZE(self->fut_callbacks);
|
|
if (len == 0) {
|
|
Py_CLEAR(self->fut_callbacks);
|
|
return PyLong_FromSsize_t(cleared_callback0);
|
|
}
|
|
|
|
if (len == 1) {
|
|
PyObject *cb_tup = PyList_GET_ITEM(self->fut_callbacks, 0);
|
|
int cmp = PyObject_RichCompareBool(
|
|
PyTuple_GET_ITEM(cb_tup, 0), fn, Py_EQ);
|
|
if (cmp == -1) {
|
|
return NULL;
|
|
}
|
|
if (cmp == 1) {
|
|
/* callbacks[0] == fn */
|
|
Py_CLEAR(self->fut_callbacks);
|
|
return PyLong_FromSsize_t(1 + cleared_callback0);
|
|
}
|
|
/* callbacks[0] != fn and len(callbacks) == 1 */
|
|
return PyLong_FromSsize_t(cleared_callback0);
|
|
}
|
|
|
|
newlist = PyList_New(len);
|
|
if (newlist == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
// Beware: PyObject_RichCompareBool below may change fut_callbacks.
|
|
// See GH-97592.
|
|
for (i = 0;
|
|
self->fut_callbacks != NULL && i < PyList_GET_SIZE(self->fut_callbacks);
|
|
i++) {
|
|
int ret;
|
|
PyObject *item = PyList_GET_ITEM(self->fut_callbacks, i);
|
|
Py_INCREF(item);
|
|
ret = PyObject_RichCompareBool(PyTuple_GET_ITEM(item, 0), fn, Py_EQ);
|
|
if (ret == 0) {
|
|
if (j < len) {
|
|
PyList_SET_ITEM(newlist, j, item);
|
|
j++;
|
|
continue;
|
|
}
|
|
ret = PyList_Append(newlist, item);
|
|
}
|
|
Py_DECREF(item);
|
|
if (ret < 0) {
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
// Note: fut_callbacks may have been cleared.
|
|
if (j == 0 || self->fut_callbacks == NULL) {
|
|
Py_CLEAR(self->fut_callbacks);
|
|
Py_DECREF(newlist);
|
|
return PyLong_FromSsize_t(len + cleared_callback0);
|
|
}
|
|
|
|
if (j < len) {
|
|
Py_SET_SIZE(newlist, j);
|
|
}
|
|
j = PyList_GET_SIZE(newlist);
|
|
len = PyList_GET_SIZE(self->fut_callbacks);
|
|
if (j != len) {
|
|
if (PyList_SetSlice(self->fut_callbacks, 0, len, newlist) < 0) {
|
|
goto fail;
|
|
}
|
|
}
|
|
Py_DECREF(newlist);
|
|
return PyLong_FromSsize_t(len - j + cleared_callback0);
|
|
|
|
fail:
|
|
Py_DECREF(newlist);
|
|
return NULL;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.cancel
|
|
|
|
cls: defining_class
|
|
/
|
|
msg: object = None
|
|
|
|
Cancel the future and schedule callbacks.
|
|
|
|
If the future is already done or cancelled, return False. Otherwise,
|
|
change the future's state to cancelled, schedule the callbacks and
|
|
return True.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future_cancel_impl(FutureObj *self, PyTypeObject *cls,
|
|
PyObject *msg)
|
|
/*[clinic end generated code: output=074956f35904b034 input=bba8f8b786941a94]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
ENSURE_FUTURE_ALIVE(state, self)
|
|
return future_cancel(state, self, msg);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.cancelled
|
|
|
|
Return True if the future was cancelled.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future_cancelled_impl(FutureObj *self)
|
|
/*[clinic end generated code: output=145197ced586357d input=943ab8b7b7b17e45]*/
|
|
{
|
|
if (future_is_alive(self) && self->fut_state == STATE_CANCELLED) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
else {
|
|
Py_RETURN_FALSE;
|
|
}
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.done
|
|
|
|
Return True if the future is done.
|
|
|
|
Done means either that a result / exception are available, or that the
|
|
future was cancelled.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future_done_impl(FutureObj *self)
|
|
/*[clinic end generated code: output=244c5ac351145096 input=28d7b23fdb65d2ac]*/
|
|
{
|
|
if (!future_is_alive(self) || self->fut_state == STATE_PENDING) {
|
|
Py_RETURN_FALSE;
|
|
}
|
|
else {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future.get_loop
|
|
|
|
cls: defining_class
|
|
/
|
|
|
|
Return the event loop the Future is bound to.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future_get_loop_impl(FutureObj *self, PyTypeObject *cls)
|
|
/*[clinic end generated code: output=f50ea6c374d9ee97 input=163c2c498b45a1f0]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
ENSURE_FUTURE_ALIVE(state, self)
|
|
return Py_NewRef(self->fut_loop);
|
|
}
|
|
|
|
static PyObject *
|
|
FutureObj_get_blocking(FutureObj *fut, void *Py_UNUSED(ignored))
|
|
{
|
|
if (future_is_alive(fut) && fut->fut_blocking) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
else {
|
|
Py_RETURN_FALSE;
|
|
}
|
|
}
|
|
|
|
static int
|
|
FutureObj_set_blocking(FutureObj *fut, PyObject *val, void *Py_UNUSED(ignored))
|
|
{
|
|
if (future_ensure_alive(fut)) {
|
|
return -1;
|
|
}
|
|
if (val == NULL) {
|
|
PyErr_SetString(PyExc_AttributeError, "cannot delete attribute");
|
|
return -1;
|
|
}
|
|
|
|
int is_true = PyObject_IsTrue(val);
|
|
if (is_true < 0) {
|
|
return -1;
|
|
}
|
|
fut->fut_blocking = is_true;
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
FutureObj_get_log_traceback(FutureObj *fut, void *Py_UNUSED(ignored))
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)fut);
|
|
ENSURE_FUTURE_ALIVE(state, fut)
|
|
if (fut->fut_log_tb) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
else {
|
|
Py_RETURN_FALSE;
|
|
}
|
|
}
|
|
|
|
static int
|
|
FutureObj_set_log_traceback(FutureObj *fut, PyObject *val, void *Py_UNUSED(ignored))
|
|
{
|
|
if (val == NULL) {
|
|
PyErr_SetString(PyExc_AttributeError, "cannot delete attribute");
|
|
return -1;
|
|
}
|
|
int is_true = PyObject_IsTrue(val);
|
|
if (is_true < 0) {
|
|
return -1;
|
|
}
|
|
if (is_true) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"_log_traceback can only be set to False");
|
|
return -1;
|
|
}
|
|
fut->fut_log_tb = is_true;
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
FutureObj_get_loop(FutureObj *fut, void *Py_UNUSED(ignored))
|
|
{
|
|
if (!future_is_alive(fut)) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return Py_NewRef(fut->fut_loop);
|
|
}
|
|
|
|
static PyObject *
|
|
FutureObj_get_callbacks(FutureObj *fut, void *Py_UNUSED(ignored))
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)fut);
|
|
Py_ssize_t i;
|
|
|
|
ENSURE_FUTURE_ALIVE(state, fut)
|
|
|
|
if (fut->fut_callback0 == NULL) {
|
|
if (fut->fut_callbacks == NULL) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
return Py_NewRef(fut->fut_callbacks);
|
|
}
|
|
|
|
Py_ssize_t len = 1;
|
|
if (fut->fut_callbacks != NULL) {
|
|
len += PyList_GET_SIZE(fut->fut_callbacks);
|
|
}
|
|
|
|
|
|
PyObject *new_list = PyList_New(len);
|
|
if (new_list == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *tup0 = PyTuple_New(2);
|
|
if (tup0 == NULL) {
|
|
Py_DECREF(new_list);
|
|
return NULL;
|
|
}
|
|
|
|
Py_INCREF(fut->fut_callback0);
|
|
PyTuple_SET_ITEM(tup0, 0, fut->fut_callback0);
|
|
assert(fut->fut_context0 != NULL);
|
|
Py_INCREF(fut->fut_context0);
|
|
PyTuple_SET_ITEM(tup0, 1, (PyObject *)fut->fut_context0);
|
|
|
|
PyList_SET_ITEM(new_list, 0, tup0);
|
|
|
|
if (fut->fut_callbacks != NULL) {
|
|
for (i = 0; i < PyList_GET_SIZE(fut->fut_callbacks); i++) {
|
|
PyObject *cb = PyList_GET_ITEM(fut->fut_callbacks, i);
|
|
Py_INCREF(cb);
|
|
PyList_SET_ITEM(new_list, i + 1, cb);
|
|
}
|
|
}
|
|
|
|
return new_list;
|
|
}
|
|
|
|
static PyObject *
|
|
FutureObj_get_result(FutureObj *fut, void *Py_UNUSED(ignored))
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)fut);
|
|
ENSURE_FUTURE_ALIVE(state, fut)
|
|
if (fut->fut_result == NULL) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return Py_NewRef(fut->fut_result);
|
|
}
|
|
|
|
static PyObject *
|
|
FutureObj_get_exception(FutureObj *fut, void *Py_UNUSED(ignored))
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)fut);
|
|
ENSURE_FUTURE_ALIVE(state, fut)
|
|
if (fut->fut_exception == NULL) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return Py_NewRef(fut->fut_exception);
|
|
}
|
|
|
|
static PyObject *
|
|
FutureObj_get_source_traceback(FutureObj *fut, void *Py_UNUSED(ignored))
|
|
{
|
|
if (!future_is_alive(fut) || fut->fut_source_tb == NULL) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return Py_NewRef(fut->fut_source_tb);
|
|
}
|
|
|
|
static PyObject *
|
|
FutureObj_get_cancel_message(FutureObj *fut, void *Py_UNUSED(ignored))
|
|
{
|
|
if (fut->fut_cancel_msg == NULL) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return Py_NewRef(fut->fut_cancel_msg);
|
|
}
|
|
|
|
static int
|
|
FutureObj_set_cancel_message(FutureObj *fut, PyObject *msg,
|
|
void *Py_UNUSED(ignored))
|
|
{
|
|
if (msg == NULL) {
|
|
PyErr_SetString(PyExc_AttributeError, "cannot delete attribute");
|
|
return -1;
|
|
}
|
|
Py_INCREF(msg);
|
|
Py_XSETREF(fut->fut_cancel_msg, msg);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
FutureObj_get_state(FutureObj *fut, void *Py_UNUSED(ignored))
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)fut);
|
|
PyObject *ret = NULL;
|
|
|
|
ENSURE_FUTURE_ALIVE(state, fut)
|
|
|
|
switch (fut->fut_state) {
|
|
case STATE_PENDING:
|
|
ret = &_Py_ID(PENDING);
|
|
break;
|
|
case STATE_CANCELLED:
|
|
ret = &_Py_ID(CANCELLED);
|
|
break;
|
|
case STATE_FINISHED:
|
|
ret = &_Py_ID(FINISHED);
|
|
break;
|
|
default:
|
|
assert (0);
|
|
}
|
|
assert(_Py_IsImmortalLoose(ret));
|
|
return ret;
|
|
}
|
|
|
|
static PyObject *
|
|
FutureObj_repr(FutureObj *fut)
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)fut);
|
|
ENSURE_FUTURE_ALIVE(state, fut)
|
|
return PyObject_CallOneArg(state->asyncio_future_repr_func, (PyObject *)fut);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Future._make_cancelled_error
|
|
|
|
Create the CancelledError to raise if the Future is cancelled.
|
|
|
|
This should only be called once when handling a cancellation since
|
|
it erases the context exception value.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Future__make_cancelled_error_impl(FutureObj *self)
|
|
/*[clinic end generated code: output=a5df276f6c1213de input=ac6effe4ba795ecc]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)self);
|
|
return create_cancelled_error(state, self);
|
|
}
|
|
|
|
static void
|
|
FutureObj_finalize(FutureObj *fut)
|
|
{
|
|
PyObject *context;
|
|
PyObject *message = NULL;
|
|
PyObject *func;
|
|
|
|
if (!fut->fut_log_tb) {
|
|
return;
|
|
}
|
|
assert(fut->fut_exception != NULL);
|
|
fut->fut_log_tb = 0;
|
|
|
|
/* Save the current exception, if any. */
|
|
PyObject *exc = PyErr_GetRaisedException();
|
|
|
|
context = PyDict_New();
|
|
if (context == NULL) {
|
|
goto finally;
|
|
}
|
|
|
|
message = PyUnicode_FromFormat(
|
|
"%s exception was never retrieved", _PyType_Name(Py_TYPE(fut)));
|
|
if (message == NULL) {
|
|
goto finally;
|
|
}
|
|
|
|
if (PyDict_SetItem(context, &_Py_ID(message), message) < 0 ||
|
|
PyDict_SetItem(context, &_Py_ID(exception), fut->fut_exception) < 0 ||
|
|
PyDict_SetItem(context, &_Py_ID(future), (PyObject*)fut) < 0) {
|
|
goto finally;
|
|
}
|
|
if (fut->fut_source_tb != NULL) {
|
|
if (PyDict_SetItem(context, &_Py_ID(source_traceback),
|
|
fut->fut_source_tb) < 0) {
|
|
goto finally;
|
|
}
|
|
}
|
|
|
|
func = PyObject_GetAttr(fut->fut_loop, &_Py_ID(call_exception_handler));
|
|
if (func != NULL) {
|
|
PyObject *res = PyObject_CallOneArg(func, context);
|
|
if (res == NULL) {
|
|
PyErr_WriteUnraisable(func);
|
|
}
|
|
else {
|
|
Py_DECREF(res);
|
|
}
|
|
Py_DECREF(func);
|
|
}
|
|
|
|
finally:
|
|
Py_XDECREF(context);
|
|
Py_XDECREF(message);
|
|
|
|
/* Restore the saved exception. */
|
|
PyErr_SetRaisedException(exc);
|
|
}
|
|
|
|
static PyMethodDef FutureType_methods[] = {
|
|
_ASYNCIO_FUTURE_RESULT_METHODDEF
|
|
_ASYNCIO_FUTURE_EXCEPTION_METHODDEF
|
|
_ASYNCIO_FUTURE_SET_RESULT_METHODDEF
|
|
_ASYNCIO_FUTURE_SET_EXCEPTION_METHODDEF
|
|
_ASYNCIO_FUTURE_ADD_DONE_CALLBACK_METHODDEF
|
|
_ASYNCIO_FUTURE_REMOVE_DONE_CALLBACK_METHODDEF
|
|
_ASYNCIO_FUTURE_CANCEL_METHODDEF
|
|
_ASYNCIO_FUTURE_CANCELLED_METHODDEF
|
|
_ASYNCIO_FUTURE_DONE_METHODDEF
|
|
_ASYNCIO_FUTURE_GET_LOOP_METHODDEF
|
|
_ASYNCIO_FUTURE__MAKE_CANCELLED_ERROR_METHODDEF
|
|
{"__class_getitem__", Py_GenericAlias, METH_O|METH_CLASS, PyDoc_STR("See PEP 585")},
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
#define FUTURE_COMMON_GETSETLIST \
|
|
{"_state", (getter)FutureObj_get_state, NULL, NULL}, \
|
|
{"_asyncio_future_blocking", (getter)FutureObj_get_blocking, \
|
|
(setter)FutureObj_set_blocking, NULL}, \
|
|
{"_loop", (getter)FutureObj_get_loop, NULL, NULL}, \
|
|
{"_callbacks", (getter)FutureObj_get_callbacks, NULL, NULL}, \
|
|
{"_result", (getter)FutureObj_get_result, NULL, NULL}, \
|
|
{"_exception", (getter)FutureObj_get_exception, NULL, NULL}, \
|
|
{"_log_traceback", (getter)FutureObj_get_log_traceback, \
|
|
(setter)FutureObj_set_log_traceback, NULL}, \
|
|
{"_source_traceback", (getter)FutureObj_get_source_traceback, \
|
|
NULL, NULL}, \
|
|
{"_cancel_message", (getter)FutureObj_get_cancel_message, \
|
|
(setter)FutureObj_set_cancel_message, NULL},
|
|
|
|
static PyGetSetDef FutureType_getsetlist[] = {
|
|
FUTURE_COMMON_GETSETLIST
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static void FutureObj_dealloc(PyObject *self);
|
|
|
|
static PyType_Slot Future_slots[] = {
|
|
{Py_tp_dealloc, FutureObj_dealloc},
|
|
{Py_tp_repr, (reprfunc)FutureObj_repr},
|
|
{Py_tp_doc, (void *)_asyncio_Future___init____doc__},
|
|
{Py_tp_traverse, (traverseproc)FutureObj_traverse},
|
|
{Py_tp_clear, (inquiry)FutureObj_clear},
|
|
{Py_tp_iter, (getiterfunc)future_new_iter},
|
|
{Py_tp_methods, FutureType_methods},
|
|
{Py_tp_getset, FutureType_getsetlist},
|
|
{Py_tp_init, (initproc)_asyncio_Future___init__},
|
|
{Py_tp_new, PyType_GenericNew},
|
|
{Py_tp_finalize, (destructor)FutureObj_finalize},
|
|
|
|
// async slots
|
|
{Py_am_await, (unaryfunc)future_new_iter},
|
|
{0, NULL},
|
|
};
|
|
|
|
static PyType_Spec Future_spec = {
|
|
.name = "_asyncio.Future",
|
|
.basicsize = sizeof(FutureObj),
|
|
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_BASETYPE |
|
|
Py_TPFLAGS_IMMUTABLETYPE | Py_TPFLAGS_MANAGED_DICT |
|
|
Py_TPFLAGS_MANAGED_WEAKREF),
|
|
.slots = Future_slots,
|
|
};
|
|
|
|
static void
|
|
FutureObj_dealloc(PyObject *self)
|
|
{
|
|
FutureObj *fut = (FutureObj *)self;
|
|
|
|
if (PyObject_CallFinalizerFromDealloc(self) < 0) {
|
|
// resurrected.
|
|
return;
|
|
}
|
|
|
|
PyTypeObject *tp = Py_TYPE(fut);
|
|
PyObject_GC_UnTrack(self);
|
|
|
|
PyObject_ClearWeakRefs(self);
|
|
|
|
(void)FutureObj_clear(fut);
|
|
tp->tp_free(fut);
|
|
Py_DECREF(tp);
|
|
}
|
|
|
|
|
|
/*********************** Future Iterator **************************/
|
|
|
|
typedef struct futureiterobject {
|
|
PyObject_HEAD
|
|
FutureObj *future;
|
|
} futureiterobject;
|
|
|
|
|
|
static void
|
|
FutureIter_dealloc(futureiterobject *it)
|
|
{
|
|
PyTypeObject *tp = Py_TYPE(it);
|
|
|
|
assert(_PyType_HasFeature(tp, Py_TPFLAGS_HEAPTYPE));
|
|
|
|
PyObject_GC_UnTrack(it);
|
|
tp->tp_clear((PyObject *)it);
|
|
|
|
if (!_Py_FREELIST_PUSH(futureiters, it, Py_futureiters_MAXFREELIST)) {
|
|
PyObject_GC_Del(it);
|
|
Py_DECREF(tp);
|
|
}
|
|
}
|
|
|
|
static PySendResult
|
|
FutureIter_am_send(futureiterobject *it,
|
|
PyObject *Py_UNUSED(arg),
|
|
PyObject **result)
|
|
{
|
|
/* arg is unused, see the comment on FutureIter_send for clarification */
|
|
|
|
PyObject *res;
|
|
FutureObj *fut = it->future;
|
|
|
|
*result = NULL;
|
|
if (fut == NULL) {
|
|
return PYGEN_ERROR;
|
|
}
|
|
|
|
if (fut->fut_state == STATE_PENDING) {
|
|
if (!fut->fut_blocking) {
|
|
fut->fut_blocking = 1;
|
|
*result = Py_NewRef(fut);
|
|
return PYGEN_NEXT;
|
|
}
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"await wasn't used with future");
|
|
return PYGEN_ERROR;
|
|
}
|
|
|
|
it->future = NULL;
|
|
res = _asyncio_Future_result_impl(fut);
|
|
if (res != NULL) {
|
|
Py_DECREF(fut);
|
|
*result = res;
|
|
return PYGEN_RETURN;
|
|
}
|
|
|
|
Py_DECREF(fut);
|
|
return PYGEN_ERROR;
|
|
}
|
|
|
|
static PyObject *
|
|
FutureIter_iternext(futureiterobject *it)
|
|
{
|
|
PyObject *result;
|
|
switch (FutureIter_am_send(it, Py_None, &result)) {
|
|
case PYGEN_RETURN:
|
|
(void)_PyGen_SetStopIterationValue(result);
|
|
Py_DECREF(result);
|
|
return NULL;
|
|
case PYGEN_NEXT:
|
|
return result;
|
|
case PYGEN_ERROR:
|
|
return NULL;
|
|
default:
|
|
Py_UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
static PyObject *
|
|
FutureIter_send(futureiterobject *self, PyObject *unused)
|
|
{
|
|
/* Future.__iter__ doesn't care about values that are pushed to the
|
|
* generator, it just returns self.result().
|
|
*/
|
|
return FutureIter_iternext(self);
|
|
}
|
|
|
|
static PyObject *
|
|
FutureIter_throw(futureiterobject *self, PyObject *const *args, Py_ssize_t nargs)
|
|
{
|
|
PyObject *type, *val = NULL, *tb = NULL;
|
|
if (!_PyArg_CheckPositional("throw", nargs, 1, 3)) {
|
|
return NULL;
|
|
}
|
|
if (nargs > 1) {
|
|
if (PyErr_WarnEx(PyExc_DeprecationWarning,
|
|
"the (type, exc, tb) signature of throw() is deprecated, "
|
|
"use the single-arg signature instead.",
|
|
1) < 0) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
type = args[0];
|
|
if (nargs == 3) {
|
|
val = args[1];
|
|
tb = args[2];
|
|
}
|
|
else if (nargs == 2) {
|
|
val = args[1];
|
|
}
|
|
|
|
if (val == Py_None) {
|
|
val = NULL;
|
|
}
|
|
if (tb == Py_None ) {
|
|
tb = NULL;
|
|
} else if (tb != NULL && !PyTraceBack_Check(tb)) {
|
|
PyErr_SetString(PyExc_TypeError, "throw() third argument must be a traceback");
|
|
return NULL;
|
|
}
|
|
|
|
Py_INCREF(type);
|
|
Py_XINCREF(val);
|
|
Py_XINCREF(tb);
|
|
|
|
if (PyExceptionClass_Check(type)) {
|
|
PyErr_NormalizeException(&type, &val, &tb);
|
|
/* No need to call PyException_SetTraceback since we'll be calling
|
|
PyErr_Restore for `type`, `val`, and `tb`. */
|
|
} else if (PyExceptionInstance_Check(type)) {
|
|
if (val) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"instance exception may not have a separate value");
|
|
goto fail;
|
|
}
|
|
val = type;
|
|
type = PyExceptionInstance_Class(type);
|
|
Py_INCREF(type);
|
|
if (tb == NULL)
|
|
tb = PyException_GetTraceback(val);
|
|
} else {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"exceptions must be classes deriving BaseException or "
|
|
"instances of such a class");
|
|
goto fail;
|
|
}
|
|
|
|
Py_CLEAR(self->future);
|
|
|
|
PyErr_Restore(type, val, tb);
|
|
|
|
return NULL;
|
|
|
|
fail:
|
|
Py_DECREF(type);
|
|
Py_XDECREF(val);
|
|
Py_XDECREF(tb);
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
FutureIter_clear(futureiterobject *it)
|
|
{
|
|
Py_CLEAR(it->future);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
FutureIter_close(futureiterobject *self, PyObject *arg)
|
|
{
|
|
(void)FutureIter_clear(self);
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static int
|
|
FutureIter_traverse(futureiterobject *it, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(Py_TYPE(it));
|
|
Py_VISIT(it->future);
|
|
return 0;
|
|
}
|
|
|
|
static PyMethodDef FutureIter_methods[] = {
|
|
{"send", (PyCFunction)FutureIter_send, METH_O, NULL},
|
|
{"throw", _PyCFunction_CAST(FutureIter_throw), METH_FASTCALL, NULL},
|
|
{"close", (PyCFunction)FutureIter_close, METH_NOARGS, NULL},
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyType_Slot FutureIter_slots[] = {
|
|
{Py_tp_dealloc, (destructor)FutureIter_dealloc},
|
|
{Py_tp_getattro, PyObject_GenericGetAttr},
|
|
{Py_tp_traverse, (traverseproc)FutureIter_traverse},
|
|
{Py_tp_clear, FutureIter_clear},
|
|
{Py_tp_iter, PyObject_SelfIter},
|
|
{Py_tp_iternext, (iternextfunc)FutureIter_iternext},
|
|
{Py_tp_methods, FutureIter_methods},
|
|
|
|
// async methods
|
|
{Py_am_send, (sendfunc)FutureIter_am_send},
|
|
{0, NULL},
|
|
};
|
|
|
|
static PyType_Spec FutureIter_spec = {
|
|
.name = "_asyncio.FutureIter",
|
|
.basicsize = sizeof(futureiterobject),
|
|
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
|
|
Py_TPFLAGS_IMMUTABLETYPE),
|
|
.slots = FutureIter_slots,
|
|
};
|
|
|
|
static PyObject *
|
|
future_new_iter(PyObject *fut)
|
|
{
|
|
futureiterobject *it;
|
|
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)fut);
|
|
ENSURE_FUTURE_ALIVE(state, fut)
|
|
|
|
it = _Py_FREELIST_POP(futureiterobject, futureiters);
|
|
if (it == NULL) {
|
|
it = PyObject_GC_New(futureiterobject, state->FutureIterType);
|
|
if (it == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
it->future = (FutureObj*)Py_NewRef(fut);
|
|
PyObject_GC_Track(it);
|
|
return (PyObject*)it;
|
|
}
|
|
|
|
|
|
/*********************** Task **************************/
|
|
|
|
|
|
/*[clinic input]
|
|
class _asyncio.Task "TaskObj *" "&Task_Type"
|
|
[clinic start generated code]*/
|
|
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=719dcef0fcc03b37]*/
|
|
|
|
static int task_call_step_soon(asyncio_state *state, TaskObj *, PyObject *);
|
|
static PyObject * task_wakeup(TaskObj *, PyObject *);
|
|
static PyObject * task_step(asyncio_state *, TaskObj *, PyObject *);
|
|
static int task_eager_start(asyncio_state *state, TaskObj *task);
|
|
|
|
/* ----- Task._step wrapper */
|
|
|
|
static int
|
|
TaskStepMethWrapper_clear(TaskStepMethWrapper *o)
|
|
{
|
|
Py_CLEAR(o->sw_task);
|
|
Py_CLEAR(o->sw_arg);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
TaskStepMethWrapper_dealloc(TaskStepMethWrapper *o)
|
|
{
|
|
PyTypeObject *tp = Py_TYPE(o);
|
|
PyObject_GC_UnTrack(o);
|
|
(void)TaskStepMethWrapper_clear(o);
|
|
Py_TYPE(o)->tp_free(o);
|
|
Py_DECREF(tp);
|
|
}
|
|
|
|
static PyObject *
|
|
TaskStepMethWrapper_call(TaskStepMethWrapper *o,
|
|
PyObject *args, PyObject *kwds)
|
|
{
|
|
if (kwds != NULL && PyDict_GET_SIZE(kwds) != 0) {
|
|
PyErr_SetString(PyExc_TypeError, "function takes no keyword arguments");
|
|
return NULL;
|
|
}
|
|
if (args != NULL && PyTuple_GET_SIZE(args) != 0) {
|
|
PyErr_SetString(PyExc_TypeError, "function takes no positional arguments");
|
|
return NULL;
|
|
}
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)o);
|
|
return task_step(state, o->sw_task, o->sw_arg);
|
|
}
|
|
|
|
static int
|
|
TaskStepMethWrapper_traverse(TaskStepMethWrapper *o,
|
|
visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(Py_TYPE(o));
|
|
Py_VISIT(o->sw_task);
|
|
Py_VISIT(o->sw_arg);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
TaskStepMethWrapper_get___self__(TaskStepMethWrapper *o, void *Py_UNUSED(ignored))
|
|
{
|
|
if (o->sw_task) {
|
|
return Py_NewRef(o->sw_task);
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static PyGetSetDef TaskStepMethWrapper_getsetlist[] = {
|
|
{"__self__", (getter)TaskStepMethWrapper_get___self__, NULL, NULL},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyType_Slot TaskStepMethWrapper_slots[] = {
|
|
{Py_tp_getset, TaskStepMethWrapper_getsetlist},
|
|
{Py_tp_dealloc, (destructor)TaskStepMethWrapper_dealloc},
|
|
{Py_tp_call, (ternaryfunc)TaskStepMethWrapper_call},
|
|
{Py_tp_getattro, PyObject_GenericGetAttr},
|
|
{Py_tp_traverse, (traverseproc)TaskStepMethWrapper_traverse},
|
|
{Py_tp_clear, (inquiry)TaskStepMethWrapper_clear},
|
|
{0, NULL},
|
|
};
|
|
|
|
static PyType_Spec TaskStepMethWrapper_spec = {
|
|
.name = "_asyncio.TaskStepMethWrapper",
|
|
.basicsize = sizeof(TaskStepMethWrapper),
|
|
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
|
|
Py_TPFLAGS_IMMUTABLETYPE),
|
|
.slots = TaskStepMethWrapper_slots,
|
|
};
|
|
|
|
static PyObject *
|
|
TaskStepMethWrapper_new(TaskObj *task, PyObject *arg)
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)task);
|
|
TaskStepMethWrapper *o;
|
|
o = PyObject_GC_New(TaskStepMethWrapper, state->TaskStepMethWrapper_Type);
|
|
if (o == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
o->sw_task = (TaskObj*)Py_NewRef(task);
|
|
o->sw_arg = Py_XNewRef(arg);
|
|
|
|
PyObject_GC_Track(o);
|
|
return (PyObject*) o;
|
|
}
|
|
|
|
/* ----- Task._wakeup implementation */
|
|
|
|
static PyMethodDef TaskWakeupDef = {
|
|
"task_wakeup",
|
|
(PyCFunction)task_wakeup,
|
|
METH_O,
|
|
NULL
|
|
};
|
|
|
|
/* ----- Task introspection helpers */
|
|
|
|
static void
|
|
register_task(asyncio_state *state, TaskObj *task)
|
|
{
|
|
ASYNCIO_STATE_LOCK(state);
|
|
assert(Task_Check(state, task));
|
|
assert(task != &state->asyncio_tasks.tail);
|
|
if (task->next != NULL) {
|
|
// already registered
|
|
goto exit;
|
|
}
|
|
assert(task->prev == NULL);
|
|
assert(state->asyncio_tasks.head != NULL);
|
|
|
|
task->next = state->asyncio_tasks.head;
|
|
state->asyncio_tasks.head->prev = task;
|
|
state->asyncio_tasks.head = task;
|
|
exit:
|
|
ASYNCIO_STATE_UNLOCK(state);
|
|
}
|
|
|
|
static int
|
|
register_eager_task(asyncio_state *state, PyObject *task)
|
|
{
|
|
return PySet_Add(state->eager_tasks, task);
|
|
}
|
|
|
|
static void
|
|
unregister_task(asyncio_state *state, TaskObj *task)
|
|
{
|
|
ASYNCIO_STATE_LOCK(state);
|
|
assert(Task_Check(state, task));
|
|
assert(task != &state->asyncio_tasks.tail);
|
|
if (task->next == NULL) {
|
|
// not registered
|
|
assert(task->prev == NULL);
|
|
assert(state->asyncio_tasks.head != task);
|
|
goto exit;
|
|
}
|
|
task->next->prev = task->prev;
|
|
if (task->prev == NULL) {
|
|
assert(state->asyncio_tasks.head == task);
|
|
state->asyncio_tasks.head = task->next;
|
|
} else {
|
|
task->prev->next = task->next;
|
|
}
|
|
task->next = NULL;
|
|
task->prev = NULL;
|
|
assert(state->asyncio_tasks.head != task);
|
|
exit:
|
|
ASYNCIO_STATE_UNLOCK(state);
|
|
}
|
|
|
|
static int
|
|
unregister_eager_task(asyncio_state *state, PyObject *task)
|
|
{
|
|
return PySet_Discard(state->eager_tasks, task);
|
|
}
|
|
|
|
static int
|
|
enter_task(asyncio_state *state, PyObject *loop, PyObject *task)
|
|
{
|
|
PyObject *item;
|
|
int res = PyDict_SetDefaultRef(state->current_tasks, loop, task, &item);
|
|
if (res < 0) {
|
|
return -1;
|
|
}
|
|
else if (res == 1) {
|
|
PyErr_Format(
|
|
PyExc_RuntimeError,
|
|
"Cannot enter into task %R while another " \
|
|
"task %R is being executed.",
|
|
task, item, NULL);
|
|
Py_DECREF(item);
|
|
return -1;
|
|
}
|
|
Py_DECREF(item);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
err_leave_task(PyObject *item, PyObject *task)
|
|
{
|
|
PyErr_Format(
|
|
PyExc_RuntimeError,
|
|
"Leaving task %R does not match the current task %R.",
|
|
task, item);
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
leave_task_predicate(PyObject *item, void *task)
|
|
{
|
|
if (item != task) {
|
|
return err_leave_task(item, (PyObject *)task);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
leave_task(asyncio_state *state, PyObject *loop, PyObject *task)
|
|
/*[clinic end generated code: output=0ebf6db4b858fb41 input=51296a46313d1ad8]*/
|
|
{
|
|
int res = _PyDict_DelItemIf(state->current_tasks, loop,
|
|
leave_task_predicate, task);
|
|
if (res == 0) {
|
|
// task was not found
|
|
return err_leave_task(Py_None, task);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static PyObject *
|
|
swap_current_task_lock_held(PyDictObject *current_tasks, PyObject *loop,
|
|
Py_hash_t hash, PyObject *task)
|
|
{
|
|
PyObject *prev_task;
|
|
if (_PyDict_GetItemRef_KnownHash_LockHeld(current_tasks, loop, hash, &prev_task) < 0) {
|
|
return NULL;
|
|
}
|
|
if (_PyDict_SetItem_KnownHash_LockHeld(current_tasks, loop, task, hash) < 0) {
|
|
Py_XDECREF(prev_task);
|
|
return NULL;
|
|
}
|
|
if (prev_task == NULL) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return prev_task;
|
|
}
|
|
|
|
static PyObject *
|
|
swap_current_task(asyncio_state *state, PyObject *loop, PyObject *task)
|
|
{
|
|
PyObject *prev_task;
|
|
|
|
if (task == Py_None) {
|
|
if (PyDict_Pop(state->current_tasks, loop, &prev_task) < 0) {
|
|
return NULL;
|
|
}
|
|
if (prev_task == NULL) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return prev_task;
|
|
}
|
|
|
|
Py_hash_t hash = PyObject_Hash(loop);
|
|
if (hash == -1) {
|
|
return NULL;
|
|
}
|
|
|
|
PyDictObject *current_tasks = (PyDictObject *)state->current_tasks;
|
|
Py_BEGIN_CRITICAL_SECTION(current_tasks);
|
|
prev_task = swap_current_task_lock_held(current_tasks, loop, hash, task);
|
|
Py_END_CRITICAL_SECTION();
|
|
return prev_task;
|
|
}
|
|
|
|
/* ----- Task */
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.__init__
|
|
|
|
coro: object
|
|
*
|
|
loop: object = None
|
|
name: object = None
|
|
context: object = None
|
|
eager_start: bool = False
|
|
|
|
A coroutine wrapped in a Future.
|
|
[clinic start generated code]*/
|
|
|
|
static int
|
|
_asyncio_Task___init___impl(TaskObj *self, PyObject *coro, PyObject *loop,
|
|
PyObject *name, PyObject *context,
|
|
int eager_start)
|
|
/*[clinic end generated code: output=7aced2d27836f1a1 input=18e3f113a51b829d]*/
|
|
{
|
|
if (future_init((FutureObj*)self, loop)) {
|
|
return -1;
|
|
}
|
|
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)self);
|
|
int is_coro = is_coroutine(state, coro);
|
|
if (is_coro == -1) {
|
|
return -1;
|
|
}
|
|
if (is_coro == 0) {
|
|
self->task_log_destroy_pending = 0;
|
|
PyErr_Format(PyExc_TypeError,
|
|
"a coroutine was expected, got %R",
|
|
coro, NULL);
|
|
return -1;
|
|
}
|
|
|
|
if (context == Py_None) {
|
|
Py_XSETREF(self->task_context, PyContext_CopyCurrent());
|
|
if (self->task_context == NULL) {
|
|
return -1;
|
|
}
|
|
} else {
|
|
self->task_context = Py_NewRef(context);
|
|
}
|
|
|
|
Py_CLEAR(self->task_fut_waiter);
|
|
self->task_must_cancel = 0;
|
|
self->task_log_destroy_pending = 1;
|
|
self->task_num_cancels_requested = 0;
|
|
Py_INCREF(coro);
|
|
Py_XSETREF(self->task_coro, coro);
|
|
|
|
if (name == Py_None) {
|
|
// optimization: defer task name formatting
|
|
// store the task counter as PyLong in the name
|
|
// for deferred formatting in get_name
|
|
#ifdef Py_GIL_DISABLED
|
|
unsigned long long counter = _Py_atomic_add_uint64(&state->task_name_counter, 1) + 1;
|
|
#else
|
|
unsigned long long counter = ++state->task_name_counter;
|
|
#endif
|
|
name = PyLong_FromUnsignedLongLong(counter);
|
|
} else if (!PyUnicode_CheckExact(name)) {
|
|
name = PyObject_Str(name);
|
|
} else {
|
|
Py_INCREF(name);
|
|
}
|
|
Py_XSETREF(self->task_name, name);
|
|
if (self->task_name == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
if (eager_start) {
|
|
PyObject *res = PyObject_CallMethodNoArgs(loop, &_Py_ID(is_running));
|
|
if (res == NULL) {
|
|
return -1;
|
|
}
|
|
int is_loop_running = Py_IsTrue(res);
|
|
Py_DECREF(res);
|
|
if (is_loop_running) {
|
|
if (task_eager_start(state, self)) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (task_call_step_soon(state, self, NULL)) {
|
|
return -1;
|
|
}
|
|
register_task(state, self);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
TaskObj_clear(TaskObj *task)
|
|
{
|
|
(void)FutureObj_clear((FutureObj*) task);
|
|
Py_CLEAR(task->task_context);
|
|
Py_CLEAR(task->task_coro);
|
|
Py_CLEAR(task->task_name);
|
|
Py_CLEAR(task->task_fut_waiter);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
TaskObj_traverse(TaskObj *task, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(Py_TYPE(task));
|
|
Py_VISIT(task->task_context);
|
|
Py_VISIT(task->task_coro);
|
|
Py_VISIT(task->task_name);
|
|
Py_VISIT(task->task_fut_waiter);
|
|
FutureObj *fut = (FutureObj *)task;
|
|
Py_VISIT(fut->fut_loop);
|
|
Py_VISIT(fut->fut_callback0);
|
|
Py_VISIT(fut->fut_context0);
|
|
Py_VISIT(fut->fut_callbacks);
|
|
Py_VISIT(fut->fut_result);
|
|
Py_VISIT(fut->fut_exception);
|
|
Py_VISIT(fut->fut_exception_tb);
|
|
Py_VISIT(fut->fut_source_tb);
|
|
Py_VISIT(fut->fut_cancel_msg);
|
|
Py_VISIT(fut->fut_cancelled_exc);
|
|
PyObject_VisitManagedDict((PyObject *)fut, visit, arg);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
TaskObj_get_log_destroy_pending(TaskObj *task, void *Py_UNUSED(ignored))
|
|
{
|
|
if (task->task_log_destroy_pending) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
else {
|
|
Py_RETURN_FALSE;
|
|
}
|
|
}
|
|
|
|
static int
|
|
TaskObj_set_log_destroy_pending(TaskObj *task, PyObject *val, void *Py_UNUSED(ignored))
|
|
{
|
|
if (val == NULL) {
|
|
PyErr_SetString(PyExc_AttributeError, "cannot delete attribute");
|
|
return -1;
|
|
}
|
|
int is_true = PyObject_IsTrue(val);
|
|
if (is_true < 0) {
|
|
return -1;
|
|
}
|
|
task->task_log_destroy_pending = is_true;
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
TaskObj_get_must_cancel(TaskObj *task, void *Py_UNUSED(ignored))
|
|
{
|
|
if (task->task_must_cancel) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
else {
|
|
Py_RETURN_FALSE;
|
|
}
|
|
}
|
|
|
|
static PyObject *
|
|
TaskObj_get_coro(TaskObj *task, void *Py_UNUSED(ignored))
|
|
{
|
|
if (task->task_coro) {
|
|
return Py_NewRef(task->task_coro);
|
|
}
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static PyObject *
|
|
TaskObj_get_fut_waiter(TaskObj *task, void *Py_UNUSED(ignored))
|
|
{
|
|
if (task->task_fut_waiter) {
|
|
return Py_NewRef(task->task_fut_waiter);
|
|
}
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static PyObject *
|
|
TaskObj_repr(TaskObj *task)
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)task);
|
|
return PyObject_CallOneArg(state->asyncio_task_repr_func,
|
|
(PyObject *)task);
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task._make_cancelled_error
|
|
|
|
Create the CancelledError to raise if the Task is cancelled.
|
|
|
|
This should only be called once when handling a cancellation since
|
|
it erases the context exception value.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task__make_cancelled_error_impl(TaskObj *self)
|
|
/*[clinic end generated code: output=55a819e8b4276fab input=52c0e32de8e2f840]*/
|
|
{
|
|
FutureObj *fut = (FutureObj*)self;
|
|
return _asyncio_Future__make_cancelled_error_impl(fut);
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.cancel
|
|
|
|
msg: object = None
|
|
|
|
Request that this task cancel itself.
|
|
|
|
This arranges for a CancelledError to be thrown into the
|
|
wrapped coroutine on the next cycle through the event loop.
|
|
The coroutine then has a chance to clean up or even deny
|
|
the request using try/except/finally.
|
|
|
|
Unlike Future.cancel, this does not guarantee that the
|
|
task will be cancelled: the exception might be caught and
|
|
acted upon, delaying cancellation of the task or preventing
|
|
cancellation completely. The task may also return a value or
|
|
raise a different exception.
|
|
|
|
Immediately after this method is called, Task.cancelled() will
|
|
not return True (unless the task was already cancelled). A
|
|
task will be marked as cancelled when the wrapped coroutine
|
|
terminates with a CancelledError exception (even if cancel()
|
|
was not called).
|
|
|
|
This also increases the task's count of cancellation requests.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_cancel_impl(TaskObj *self, PyObject *msg)
|
|
/*[clinic end generated code: output=c66b60d41c74f9f1 input=7bb51bf25974c783]*/
|
|
{
|
|
self->task_log_tb = 0;
|
|
|
|
if (self->task_state != STATE_PENDING) {
|
|
Py_RETURN_FALSE;
|
|
}
|
|
|
|
self->task_num_cancels_requested += 1;
|
|
|
|
// These three lines are controversial. See discussion starting at
|
|
// https://github.com/python/cpython/pull/31394#issuecomment-1053545331
|
|
// and corresponding code in tasks.py.
|
|
// if (self->task_num_cancels_requested > 1) {
|
|
// Py_RETURN_FALSE;
|
|
// }
|
|
|
|
if (self->task_fut_waiter) {
|
|
PyObject *res;
|
|
int is_true;
|
|
|
|
res = PyObject_CallMethodOneArg(self->task_fut_waiter,
|
|
&_Py_ID(cancel), msg);
|
|
if (res == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
is_true = PyObject_IsTrue(res);
|
|
Py_DECREF(res);
|
|
if (is_true < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
if (is_true) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
}
|
|
|
|
self->task_must_cancel = 1;
|
|
Py_XINCREF(msg);
|
|
Py_XSETREF(self->task_cancel_msg, msg);
|
|
Py_RETURN_TRUE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.cancelling
|
|
|
|
Return the count of the task's cancellation requests.
|
|
|
|
This count is incremented when .cancel() is called
|
|
and may be decremented using .uncancel().
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_cancelling_impl(TaskObj *self)
|
|
/*[clinic end generated code: output=803b3af96f917d7e input=b625224d310cbb17]*/
|
|
/*[clinic end generated code]*/
|
|
{
|
|
return PyLong_FromLong(self->task_num_cancels_requested);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.uncancel
|
|
|
|
Decrement the task's count of cancellation requests.
|
|
|
|
This should be used by tasks that catch CancelledError
|
|
and wish to continue indefinitely until they are cancelled again.
|
|
|
|
Returns the remaining number of cancellation requests.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_uncancel_impl(TaskObj *self)
|
|
/*[clinic end generated code: output=58184d236a817d3c input=68f81a4b90b46be2]*/
|
|
/*[clinic end generated code]*/
|
|
{
|
|
if (self->task_num_cancels_requested > 0) {
|
|
self->task_num_cancels_requested -= 1;
|
|
if (self->task_num_cancels_requested == 0) {
|
|
self->task_must_cancel = 0;
|
|
}
|
|
}
|
|
return PyLong_FromLong(self->task_num_cancels_requested);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.get_stack
|
|
|
|
cls: defining_class
|
|
/
|
|
*
|
|
limit: object = None
|
|
|
|
Return the list of stack frames for this task's coroutine.
|
|
|
|
If the coroutine is not done, this returns the stack where it is
|
|
suspended. If the coroutine has completed successfully or was
|
|
cancelled, this returns an empty list. If the coroutine was
|
|
terminated by an exception, this returns the list of traceback
|
|
frames.
|
|
|
|
The frames are always ordered from oldest to newest.
|
|
|
|
The optional limit gives the maximum number of frames to
|
|
return; by default all available frames are returned. Its
|
|
meaning differs depending on whether a stack or a traceback is
|
|
returned: the newest frames of a stack are returned, but the
|
|
oldest frames of a traceback are returned. (This matches the
|
|
behavior of the traceback module.)
|
|
|
|
For reasons beyond our control, only one stack frame is
|
|
returned for a suspended coroutine.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_get_stack_impl(TaskObj *self, PyTypeObject *cls,
|
|
PyObject *limit)
|
|
/*[clinic end generated code: output=6774dfc10d3857fa input=8e01c9b2618ae953]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
PyObject *stack[] = {(PyObject *)self, limit};
|
|
return PyObject_Vectorcall(state->asyncio_task_get_stack_func,
|
|
stack, 2, NULL);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.print_stack
|
|
|
|
cls: defining_class
|
|
/
|
|
*
|
|
limit: object = None
|
|
file: object = None
|
|
|
|
Print the stack or traceback for this task's coroutine.
|
|
|
|
This produces output similar to that of the traceback module,
|
|
for the frames retrieved by get_stack(). The limit argument
|
|
is passed to get_stack(). The file argument is an I/O stream
|
|
to which the output is written; by default output is written
|
|
to sys.stderr.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_print_stack_impl(TaskObj *self, PyTypeObject *cls,
|
|
PyObject *limit, PyObject *file)
|
|
/*[clinic end generated code: output=b38affe9289ec826 input=150b35ba2d3a7dee]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_cls(cls);
|
|
PyObject *stack[] = {(PyObject *)self, limit, file};
|
|
return PyObject_Vectorcall(state->asyncio_task_print_stack_func,
|
|
stack, 3, NULL);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.set_result
|
|
|
|
result: object
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_set_result(TaskObj *self, PyObject *result)
|
|
/*[clinic end generated code: output=1dcae308bfcba318 input=9d1a00c07be41bab]*/
|
|
{
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"Task does not support set_result operation");
|
|
return NULL;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.set_exception
|
|
|
|
exception: object
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_set_exception(TaskObj *self, PyObject *exception)
|
|
/*[clinic end generated code: output=bc377fc28067303d input=9a8f65c83dcf893a]*/
|
|
{
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"Task does not support set_exception operation");
|
|
return NULL;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.get_coro
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_get_coro_impl(TaskObj *self)
|
|
/*[clinic end generated code: output=bcac27c8cc6c8073 input=d2e8606c42a7b403]*/
|
|
{
|
|
if (self->task_coro) {
|
|
return Py_NewRef(self->task_coro);
|
|
}
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.get_context
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_get_context_impl(TaskObj *self)
|
|
/*[clinic end generated code: output=6996f53d3dc01aef input=87c0b209b8fceeeb]*/
|
|
{
|
|
return Py_NewRef(self->task_context);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.get_name
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_get_name_impl(TaskObj *self)
|
|
/*[clinic end generated code: output=0ecf1570c3b37a8f input=a4a6595d12f4f0f8]*/
|
|
{
|
|
if (self->task_name) {
|
|
if (PyLong_CheckExact(self->task_name)) {
|
|
PyObject *name = PyUnicode_FromFormat("Task-%S", self->task_name);
|
|
if (name == NULL) {
|
|
return NULL;
|
|
}
|
|
Py_SETREF(self->task_name, name);
|
|
}
|
|
return Py_NewRef(self->task_name);
|
|
}
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.Task.set_name
|
|
|
|
value: object
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_Task_set_name(TaskObj *self, PyObject *value)
|
|
/*[clinic end generated code: output=138a8d51e32057d6 input=a8359b6e65f8fd31]*/
|
|
{
|
|
if (!PyUnicode_CheckExact(value)) {
|
|
value = PyObject_Str(value);
|
|
if (value == NULL) {
|
|
return NULL;
|
|
}
|
|
} else {
|
|
Py_INCREF(value);
|
|
}
|
|
|
|
Py_XSETREF(self->task_name, value);
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static void
|
|
TaskObj_finalize(TaskObj *task)
|
|
{
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)task);
|
|
// Unregister the task from the linked list of tasks.
|
|
// Since task is a native task, we directly call the
|
|
// unregister_task function. Third party event loops
|
|
// should use the asyncio._unregister_task function.
|
|
// See https://docs.python.org/3/library/asyncio-extending.html#task-lifetime-support
|
|
|
|
unregister_task(state, task);
|
|
|
|
PyObject *context;
|
|
PyObject *message = NULL;
|
|
PyObject *func;
|
|
|
|
if (task->task_state != STATE_PENDING || !task->task_log_destroy_pending) {
|
|
goto done;
|
|
}
|
|
|
|
/* Save the current exception, if any. */
|
|
PyObject *exc = PyErr_GetRaisedException();
|
|
|
|
context = PyDict_New();
|
|
if (context == NULL) {
|
|
goto finally;
|
|
}
|
|
|
|
message = PyUnicode_FromString("Task was destroyed but it is pending!");
|
|
if (message == NULL) {
|
|
goto finally;
|
|
}
|
|
|
|
if (PyDict_SetItem(context, &_Py_ID(message), message) < 0 ||
|
|
PyDict_SetItem(context, &_Py_ID(task), (PyObject*)task) < 0)
|
|
{
|
|
goto finally;
|
|
}
|
|
|
|
if (task->task_source_tb != NULL) {
|
|
if (PyDict_SetItem(context, &_Py_ID(source_traceback),
|
|
task->task_source_tb) < 0)
|
|
{
|
|
goto finally;
|
|
}
|
|
}
|
|
|
|
func = PyObject_GetAttr(task->task_loop, &_Py_ID(call_exception_handler));
|
|
if (func != NULL) {
|
|
PyObject *res = PyObject_CallOneArg(func, context);
|
|
if (res == NULL) {
|
|
PyErr_WriteUnraisable(func);
|
|
}
|
|
else {
|
|
Py_DECREF(res);
|
|
}
|
|
Py_DECREF(func);
|
|
}
|
|
|
|
finally:
|
|
Py_XDECREF(context);
|
|
Py_XDECREF(message);
|
|
|
|
/* Restore the saved exception. */
|
|
PyErr_SetRaisedException(exc);
|
|
|
|
done:
|
|
FutureObj_finalize((FutureObj*)task);
|
|
}
|
|
|
|
static void TaskObj_dealloc(PyObject *); /* Needs Task_CheckExact */
|
|
|
|
static PyMethodDef TaskType_methods[] = {
|
|
_ASYNCIO_FUTURE_RESULT_METHODDEF
|
|
_ASYNCIO_FUTURE_EXCEPTION_METHODDEF
|
|
_ASYNCIO_FUTURE_ADD_DONE_CALLBACK_METHODDEF
|
|
_ASYNCIO_FUTURE_REMOVE_DONE_CALLBACK_METHODDEF
|
|
_ASYNCIO_FUTURE_CANCELLED_METHODDEF
|
|
_ASYNCIO_FUTURE_DONE_METHODDEF
|
|
_ASYNCIO_TASK_SET_RESULT_METHODDEF
|
|
_ASYNCIO_TASK_SET_EXCEPTION_METHODDEF
|
|
_ASYNCIO_TASK_CANCEL_METHODDEF
|
|
_ASYNCIO_TASK_CANCELLING_METHODDEF
|
|
_ASYNCIO_TASK_UNCANCEL_METHODDEF
|
|
_ASYNCIO_TASK_GET_STACK_METHODDEF
|
|
_ASYNCIO_TASK_PRINT_STACK_METHODDEF
|
|
_ASYNCIO_TASK__MAKE_CANCELLED_ERROR_METHODDEF
|
|
_ASYNCIO_TASK_GET_NAME_METHODDEF
|
|
_ASYNCIO_TASK_SET_NAME_METHODDEF
|
|
_ASYNCIO_TASK_GET_CORO_METHODDEF
|
|
_ASYNCIO_TASK_GET_CONTEXT_METHODDEF
|
|
{"__class_getitem__", Py_GenericAlias, METH_O|METH_CLASS, PyDoc_STR("See PEP 585")},
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyGetSetDef TaskType_getsetlist[] = {
|
|
FUTURE_COMMON_GETSETLIST
|
|
{"_log_destroy_pending", (getter)TaskObj_get_log_destroy_pending,
|
|
(setter)TaskObj_set_log_destroy_pending, NULL},
|
|
{"_must_cancel", (getter)TaskObj_get_must_cancel, NULL, NULL},
|
|
{"_coro", (getter)TaskObj_get_coro, NULL, NULL},
|
|
{"_fut_waiter", (getter)TaskObj_get_fut_waiter, NULL, NULL},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyType_Slot Task_slots[] = {
|
|
{Py_tp_dealloc, TaskObj_dealloc},
|
|
{Py_tp_repr, (reprfunc)TaskObj_repr},
|
|
{Py_tp_doc, (void *)_asyncio_Task___init____doc__},
|
|
{Py_tp_traverse, (traverseproc)TaskObj_traverse},
|
|
{Py_tp_clear, (inquiry)TaskObj_clear},
|
|
{Py_tp_iter, (getiterfunc)future_new_iter},
|
|
{Py_tp_methods, TaskType_methods},
|
|
{Py_tp_getset, TaskType_getsetlist},
|
|
{Py_tp_init, (initproc)_asyncio_Task___init__},
|
|
{Py_tp_new, PyType_GenericNew},
|
|
{Py_tp_finalize, (destructor)TaskObj_finalize},
|
|
|
|
// async slots
|
|
{Py_am_await, (unaryfunc)future_new_iter},
|
|
{0, NULL},
|
|
};
|
|
|
|
static PyType_Spec Task_spec = {
|
|
.name = "_asyncio.Task",
|
|
.basicsize = sizeof(TaskObj),
|
|
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_BASETYPE |
|
|
Py_TPFLAGS_IMMUTABLETYPE | Py_TPFLAGS_MANAGED_DICT |
|
|
Py_TPFLAGS_MANAGED_WEAKREF),
|
|
.slots = Task_slots,
|
|
};
|
|
|
|
static void
|
|
TaskObj_dealloc(PyObject *self)
|
|
{
|
|
TaskObj *task = (TaskObj *)self;
|
|
|
|
if (PyObject_CallFinalizerFromDealloc(self) < 0) {
|
|
// resurrected.
|
|
return;
|
|
}
|
|
|
|
PyTypeObject *tp = Py_TYPE(task);
|
|
PyObject_GC_UnTrack(self);
|
|
|
|
PyObject_ClearWeakRefs(self);
|
|
|
|
(void)TaskObj_clear(task);
|
|
tp->tp_free(task);
|
|
Py_DECREF(tp);
|
|
}
|
|
|
|
static int
|
|
task_call_step_soon(asyncio_state *state, TaskObj *task, PyObject *arg)
|
|
{
|
|
PyObject *cb = TaskStepMethWrapper_new(task, arg);
|
|
if (cb == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
int ret = call_soon(state, task->task_loop, cb, NULL, task->task_context);
|
|
Py_DECREF(cb);
|
|
return ret;
|
|
}
|
|
|
|
static PyObject *
|
|
task_set_error_soon(asyncio_state *state, TaskObj *task, PyObject *et,
|
|
const char *format, ...)
|
|
{
|
|
PyObject* msg;
|
|
|
|
va_list vargs;
|
|
va_start(vargs, format);
|
|
msg = PyUnicode_FromFormatV(format, vargs);
|
|
va_end(vargs);
|
|
|
|
if (msg == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *e = PyObject_CallOneArg(et, msg);
|
|
Py_DECREF(msg);
|
|
if (e == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (task_call_step_soon(state, task, e) == -1) {
|
|
Py_DECREF(e);
|
|
return NULL;
|
|
}
|
|
|
|
Py_DECREF(e);
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static inline int
|
|
gen_status_from_result(PyObject **result)
|
|
{
|
|
if (*result != NULL) {
|
|
return PYGEN_NEXT;
|
|
}
|
|
if (_PyGen_FetchStopIterationValue(result) == 0) {
|
|
return PYGEN_RETURN;
|
|
}
|
|
|
|
assert(PyErr_Occurred());
|
|
return PYGEN_ERROR;
|
|
}
|
|
|
|
static PyObject *
|
|
task_step_impl(asyncio_state *state, TaskObj *task, PyObject *exc)
|
|
{
|
|
int clear_exc = 0;
|
|
PyObject *result = NULL;
|
|
PyObject *coro;
|
|
PyObject *o;
|
|
|
|
if (task->task_state != STATE_PENDING) {
|
|
PyErr_Format(state->asyncio_InvalidStateError,
|
|
"__step(): already done: %R %R",
|
|
task,
|
|
exc ? exc : Py_None);
|
|
goto fail;
|
|
}
|
|
|
|
if (task->task_must_cancel) {
|
|
assert(exc != Py_None);
|
|
|
|
if (!exc || !PyErr_GivenExceptionMatches(exc, state->asyncio_CancelledError)) {
|
|
/* exc was not a CancelledError */
|
|
exc = create_cancelled_error(state, (FutureObj*)task);
|
|
|
|
if (!exc) {
|
|
goto fail;
|
|
}
|
|
clear_exc = 1;
|
|
}
|
|
|
|
task->task_must_cancel = 0;
|
|
}
|
|
|
|
Py_CLEAR(task->task_fut_waiter);
|
|
|
|
coro = task->task_coro;
|
|
if (coro == NULL) {
|
|
PyErr_SetString(PyExc_RuntimeError, "uninitialized Task object");
|
|
if (clear_exc) {
|
|
/* We created 'exc' during this call */
|
|
Py_DECREF(exc);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int gen_status = PYGEN_ERROR;
|
|
if (exc == NULL) {
|
|
gen_status = PyIter_Send(coro, Py_None, &result);
|
|
}
|
|
else {
|
|
result = PyObject_CallMethodOneArg(coro, &_Py_ID(throw), exc);
|
|
gen_status = gen_status_from_result(&result);
|
|
if (clear_exc) {
|
|
/* We created 'exc' during this call */
|
|
Py_DECREF(exc);
|
|
}
|
|
}
|
|
|
|
if (gen_status == PYGEN_RETURN || gen_status == PYGEN_ERROR) {
|
|
if (result != NULL) {
|
|
/* The error is StopIteration and that means that
|
|
the underlying coroutine has resolved */
|
|
|
|
PyObject *tmp;
|
|
if (task->task_must_cancel) {
|
|
// Task is cancelled right before coro stops.
|
|
task->task_must_cancel = 0;
|
|
tmp = future_cancel(state, (FutureObj*)task,
|
|
task->task_cancel_msg);
|
|
}
|
|
else {
|
|
tmp = future_set_result(state, (FutureObj*)task, result);
|
|
}
|
|
|
|
Py_DECREF(result);
|
|
|
|
if (tmp == NULL) {
|
|
return NULL;
|
|
}
|
|
Py_DECREF(tmp);
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
if (PyErr_ExceptionMatches(state->asyncio_CancelledError)) {
|
|
/* CancelledError */
|
|
|
|
PyObject *exc = PyErr_GetRaisedException();
|
|
assert(exc);
|
|
|
|
FutureObj *fut = (FutureObj*)task;
|
|
/* transfer ownership */
|
|
fut->fut_cancelled_exc = exc;
|
|
|
|
return future_cancel(state, fut, NULL);
|
|
}
|
|
|
|
/* Some other exception; pop it and call Task.set_exception() */
|
|
PyObject *exc = PyErr_GetRaisedException();
|
|
assert(exc);
|
|
|
|
o = future_set_exception(state, (FutureObj*)task, exc);
|
|
if (!o) {
|
|
/* An exception in Task.set_exception() */
|
|
Py_DECREF(exc);
|
|
goto fail;
|
|
}
|
|
assert(o == Py_None);
|
|
Py_DECREF(o);
|
|
|
|
if (PyErr_GivenExceptionMatches(exc, PyExc_KeyboardInterrupt) ||
|
|
PyErr_GivenExceptionMatches(exc, PyExc_SystemExit))
|
|
{
|
|
/* We've got a KeyboardInterrupt or a SystemError; re-raise it */
|
|
PyErr_SetRaisedException(exc);
|
|
goto fail;
|
|
}
|
|
|
|
Py_DECREF(exc);
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
PyObject *ret = task_step_handle_result_impl(state, task, result);
|
|
return ret;
|
|
|
|
fail:
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
task_step_handle_result_impl(asyncio_state *state, TaskObj *task, PyObject *result)
|
|
{
|
|
int res;
|
|
PyObject *o;
|
|
|
|
if (result == (PyObject*)task) {
|
|
/* We have a task that wants to await on itself */
|
|
goto self_await;
|
|
}
|
|
|
|
/* Check if `result` is FutureObj or TaskObj (and not a subclass) */
|
|
if (Future_CheckExact(state, result) || Task_CheckExact(state, result)) {
|
|
PyObject *wrapper;
|
|
PyObject *tmp;
|
|
FutureObj *fut = (FutureObj*)result;
|
|
|
|
/* Check if `result` future is attached to a different loop */
|
|
if (fut->fut_loop != task->task_loop) {
|
|
goto different_loop;
|
|
}
|
|
|
|
if (!fut->fut_blocking) {
|
|
goto yield_insteadof_yf;
|
|
}
|
|
|
|
fut->fut_blocking = 0;
|
|
|
|
/* result.add_done_callback(task._wakeup) */
|
|
wrapper = PyCFunction_New(&TaskWakeupDef, (PyObject *)task);
|
|
if (wrapper == NULL) {
|
|
goto fail;
|
|
}
|
|
tmp = future_add_done_callback(state,
|
|
(FutureObj*)result, wrapper, task->task_context);
|
|
Py_DECREF(wrapper);
|
|
if (tmp == NULL) {
|
|
goto fail;
|
|
}
|
|
Py_DECREF(tmp);
|
|
|
|
/* task._fut_waiter = result */
|
|
task->task_fut_waiter = result; /* no incref is necessary */
|
|
|
|
if (task->task_must_cancel) {
|
|
PyObject *r;
|
|
int is_true;
|
|
r = PyObject_CallMethodOneArg(result, &_Py_ID(cancel),
|
|
task->task_cancel_msg);
|
|
if (r == NULL) {
|
|
return NULL;
|
|
}
|
|
is_true = PyObject_IsTrue(r);
|
|
Py_DECREF(r);
|
|
if (is_true < 0) {
|
|
return NULL;
|
|
}
|
|
else if (is_true) {
|
|
task->task_must_cancel = 0;
|
|
}
|
|
}
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/* Check if `result` is None */
|
|
if (result == Py_None) {
|
|
/* Bare yield relinquishes control for one event loop iteration. */
|
|
if (task_call_step_soon(state, task, NULL)) {
|
|
goto fail;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* Check if `result` is a Future-compatible object */
|
|
if (PyObject_GetOptionalAttr(result, &_Py_ID(_asyncio_future_blocking), &o) < 0) {
|
|
goto fail;
|
|
}
|
|
if (o != NULL && o != Py_None) {
|
|
/* `result` is a Future-compatible object */
|
|
PyObject *wrapper;
|
|
PyObject *tmp;
|
|
|
|
int blocking = PyObject_IsTrue(o);
|
|
Py_DECREF(o);
|
|
if (blocking < 0) {
|
|
goto fail;
|
|
}
|
|
|
|
/* Check if `result` future is attached to a different loop */
|
|
PyObject *oloop = get_future_loop(state, result);
|
|
if (oloop == NULL) {
|
|
goto fail;
|
|
}
|
|
if (oloop != task->task_loop) {
|
|
Py_DECREF(oloop);
|
|
goto different_loop;
|
|
}
|
|
Py_DECREF(oloop);
|
|
|
|
if (!blocking) {
|
|
goto yield_insteadof_yf;
|
|
}
|
|
|
|
/* result._asyncio_future_blocking = False */
|
|
if (PyObject_SetAttr(
|
|
result, &_Py_ID(_asyncio_future_blocking), Py_False) == -1) {
|
|
goto fail;
|
|
}
|
|
|
|
wrapper = PyCFunction_New(&TaskWakeupDef, (PyObject *)task);
|
|
if (wrapper == NULL) {
|
|
goto fail;
|
|
}
|
|
|
|
/* result.add_done_callback(task._wakeup) */
|
|
PyObject *add_cb = PyObject_GetAttr(
|
|
result, &_Py_ID(add_done_callback));
|
|
if (add_cb == NULL) {
|
|
Py_DECREF(wrapper);
|
|
goto fail;
|
|
}
|
|
PyObject *stack[2];
|
|
stack[0] = wrapper;
|
|
stack[1] = (PyObject *)task->task_context;
|
|
EVAL_CALL_STAT_INC_IF_FUNCTION(EVAL_CALL_API, add_cb);
|
|
tmp = PyObject_Vectorcall(add_cb, stack, 1, state->context_kwname);
|
|
Py_DECREF(add_cb);
|
|
Py_DECREF(wrapper);
|
|
if (tmp == NULL) {
|
|
goto fail;
|
|
}
|
|
Py_DECREF(tmp);
|
|
|
|
/* task._fut_waiter = result */
|
|
task->task_fut_waiter = result; /* no incref is necessary */
|
|
|
|
if (task->task_must_cancel) {
|
|
PyObject *r;
|
|
int is_true;
|
|
r = PyObject_CallMethodOneArg(result, &_Py_ID(cancel),
|
|
task->task_cancel_msg);
|
|
if (r == NULL) {
|
|
return NULL;
|
|
}
|
|
is_true = PyObject_IsTrue(r);
|
|
Py_DECREF(r);
|
|
if (is_true < 0) {
|
|
return NULL;
|
|
}
|
|
else if (is_true) {
|
|
task->task_must_cancel = 0;
|
|
}
|
|
}
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
Py_XDECREF(o);
|
|
/* Check if `result` is a generator */
|
|
res = PyObject_IsInstance(result, (PyObject*)&PyGen_Type);
|
|
if (res < 0) {
|
|
goto fail;
|
|
}
|
|
if (res) {
|
|
/* `result` is a generator */
|
|
o = task_set_error_soon(
|
|
state, task, PyExc_RuntimeError,
|
|
"yield was used instead of yield from for "
|
|
"generator in task %R with %R", task, result);
|
|
Py_DECREF(result);
|
|
return o;
|
|
}
|
|
|
|
/* The `result` is none of the above */
|
|
o = task_set_error_soon(
|
|
state, task, PyExc_RuntimeError, "Task got bad yield: %R", result);
|
|
Py_DECREF(result);
|
|
return o;
|
|
|
|
self_await:
|
|
o = task_set_error_soon(
|
|
state, task, PyExc_RuntimeError,
|
|
"Task cannot await on itself: %R", task);
|
|
Py_DECREF(result);
|
|
return o;
|
|
|
|
yield_insteadof_yf:
|
|
o = task_set_error_soon(
|
|
state, task, PyExc_RuntimeError,
|
|
"yield was used instead of yield from "
|
|
"in task %R with %R",
|
|
task, result);
|
|
Py_DECREF(result);
|
|
return o;
|
|
|
|
different_loop:
|
|
o = task_set_error_soon(
|
|
state, task, PyExc_RuntimeError,
|
|
"Task %R got Future %R attached to a different loop",
|
|
task, result);
|
|
Py_DECREF(result);
|
|
return o;
|
|
|
|
fail:
|
|
Py_XDECREF(result);
|
|
return NULL;
|
|
}
|
|
|
|
static PyObject *
|
|
task_step(asyncio_state *state, TaskObj *task, PyObject *exc)
|
|
{
|
|
PyObject *res;
|
|
|
|
if (enter_task(state, task->task_loop, (PyObject*)task) < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
res = task_step_impl(state, task, exc);
|
|
|
|
if (res == NULL) {
|
|
PyObject *exc = PyErr_GetRaisedException();
|
|
leave_task(state, task->task_loop, (PyObject*)task);
|
|
_PyErr_ChainExceptions1(exc);
|
|
return NULL;
|
|
}
|
|
else {
|
|
if (leave_task(state, task->task_loop, (PyObject*)task) < 0) {
|
|
Py_DECREF(res);
|
|
return NULL;
|
|
}
|
|
else {
|
|
return res;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
task_eager_start(asyncio_state *state, TaskObj *task)
|
|
{
|
|
assert(task != NULL);
|
|
PyObject *prevtask = swap_current_task(state, task->task_loop, (PyObject *)task);
|
|
if (prevtask == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
if (register_eager_task(state, (PyObject *)task) == -1) {
|
|
Py_DECREF(prevtask);
|
|
return -1;
|
|
}
|
|
|
|
if (PyContext_Enter(task->task_context) == -1) {
|
|
Py_DECREF(prevtask);
|
|
return -1;
|
|
}
|
|
|
|
int retval = 0;
|
|
|
|
PyObject *stepres = task_step_impl(state, task, NULL);
|
|
if (stepres == NULL) {
|
|
PyObject *exc = PyErr_GetRaisedException();
|
|
_PyErr_ChainExceptions1(exc);
|
|
retval = -1;
|
|
} else {
|
|
Py_DECREF(stepres);
|
|
}
|
|
|
|
PyObject *curtask = swap_current_task(state, task->task_loop, prevtask);
|
|
Py_DECREF(prevtask);
|
|
if (curtask == NULL) {
|
|
retval = -1;
|
|
} else {
|
|
assert(curtask == (PyObject *)task);
|
|
Py_DECREF(curtask);
|
|
}
|
|
|
|
if (unregister_eager_task(state, (PyObject *)task) == -1) {
|
|
retval = -1;
|
|
}
|
|
|
|
if (PyContext_Exit(task->task_context) == -1) {
|
|
retval = -1;
|
|
}
|
|
|
|
if (task->task_state == STATE_PENDING) {
|
|
register_task(state, task);
|
|
} else {
|
|
// This seems to really help performance on pyperformance benchmarks
|
|
Py_CLEAR(task->task_coro);
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
static PyObject *
|
|
task_wakeup(TaskObj *task, PyObject *o)
|
|
{
|
|
PyObject *result;
|
|
assert(o);
|
|
|
|
asyncio_state *state = get_asyncio_state_by_def((PyObject *)task);
|
|
if (Future_CheckExact(state, o) || Task_CheckExact(state, o)) {
|
|
PyObject *fut_result = NULL;
|
|
int res = future_get_result(state, (FutureObj*)o, &fut_result);
|
|
|
|
switch(res) {
|
|
case -1:
|
|
assert(fut_result == NULL);
|
|
break; /* exception raised */
|
|
case 0:
|
|
Py_DECREF(fut_result);
|
|
return task_step(state, task, NULL);
|
|
default:
|
|
assert(res == 1);
|
|
result = task_step(state, task, fut_result);
|
|
Py_DECREF(fut_result);
|
|
return result;
|
|
}
|
|
}
|
|
else {
|
|
PyObject *fut_result = PyObject_CallMethod(o, "result", NULL);
|
|
if (fut_result != NULL) {
|
|
Py_DECREF(fut_result);
|
|
return task_step(state, task, NULL);
|
|
}
|
|
/* exception raised */
|
|
}
|
|
|
|
PyObject *exc = PyErr_GetRaisedException();
|
|
assert(exc);
|
|
|
|
result = task_step(state, task, exc);
|
|
|
|
Py_DECREF(exc);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*********************** Functions **************************/
|
|
|
|
|
|
/*[clinic input]
|
|
_asyncio._get_running_loop
|
|
|
|
Return the running event loop or None.
|
|
|
|
This is a low-level function intended to be used by event loops.
|
|
This function is thread-specific.
|
|
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio__get_running_loop_impl(PyObject *module)
|
|
/*[clinic end generated code: output=b4390af721411a0a input=0a21627e25a4bd43]*/
|
|
{
|
|
_PyThreadStateImpl *ts = (_PyThreadStateImpl *)_PyThreadState_GET();
|
|
PyObject *loop = Py_XNewRef(ts->asyncio_running_loop);
|
|
if (loop == NULL) {
|
|
/* There's no currently running event loop */
|
|
Py_RETURN_NONE;
|
|
}
|
|
return loop;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio._set_running_loop
|
|
loop: 'O'
|
|
/
|
|
|
|
Set the running event loop.
|
|
|
|
This is a low-level function intended to be used by event loops.
|
|
This function is thread-specific.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio__set_running_loop(PyObject *module, PyObject *loop)
|
|
/*[clinic end generated code: output=ae56bf7a28ca189a input=4c9720233d606604]*/
|
|
{
|
|
_PyThreadStateImpl *ts = (_PyThreadStateImpl *)_PyThreadState_GET();
|
|
if (loop == Py_None) {
|
|
loop = NULL;
|
|
}
|
|
Py_XSETREF(ts->asyncio_running_loop, Py_XNewRef(loop));
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.get_event_loop
|
|
|
|
Return an asyncio event loop.
|
|
|
|
When called from a coroutine or a callback (e.g. scheduled with
|
|
call_soon or similar API), this function will always return the
|
|
running event loop.
|
|
|
|
If there is no running event loop set, the function will return
|
|
the result of `get_event_loop_policy().get_event_loop()` call.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_get_event_loop_impl(PyObject *module)
|
|
/*[clinic end generated code: output=2a2d8b2f824c648b input=9364bf2916c8655d]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state(module);
|
|
return get_event_loop(state);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio.get_running_loop
|
|
|
|
Return the running event loop. Raise a RuntimeError if there is none.
|
|
|
|
This function is thread-specific.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_get_running_loop_impl(PyObject *module)
|
|
/*[clinic end generated code: output=c247b5f9e529530e input=2a3bf02ba39f173d]*/
|
|
{
|
|
PyObject *loop;
|
|
_PyThreadStateImpl *ts = (_PyThreadStateImpl *)_PyThreadState_GET();
|
|
loop = Py_XNewRef(ts->asyncio_running_loop);
|
|
if (loop == NULL) {
|
|
/* There's no currently running event loop */
|
|
PyErr_SetString(
|
|
PyExc_RuntimeError, "no running event loop");
|
|
return NULL;
|
|
}
|
|
return loop;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio._register_task
|
|
|
|
task: object
|
|
|
|
Register a new task in asyncio as executed by loop.
|
|
|
|
Returns None.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio__register_task_impl(PyObject *module, PyObject *task)
|
|
/*[clinic end generated code: output=8672dadd69a7d4e2 input=21075aaea14dfbad]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state(module);
|
|
if (Task_Check(state, task)) {
|
|
// task is an asyncio.Task instance or subclass, use efficient
|
|
// linked-list implementation.
|
|
register_task(state, (TaskObj *)task);
|
|
Py_RETURN_NONE;
|
|
}
|
|
// As task does not inherit from asyncio.Task, fallback to less efficient
|
|
// weakset implementation.
|
|
PyObject *res = PyObject_CallMethodOneArg(state->non_asyncio_tasks,
|
|
&_Py_ID(add), task);
|
|
if (res == NULL) {
|
|
return NULL;
|
|
}
|
|
Py_DECREF(res);
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio._register_eager_task
|
|
|
|
task: object
|
|
|
|
Register a new task in asyncio as executed by loop.
|
|
|
|
Returns None.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio__register_eager_task_impl(PyObject *module, PyObject *task)
|
|
/*[clinic end generated code: output=dfe1d45367c73f1a input=237f684683398c51]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state(module);
|
|
if (register_eager_task(state, task) < 0) {
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
_asyncio._unregister_task
|
|
|
|
task: object
|
|
|
|
Unregister a task.
|
|
|
|
Returns None.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio__unregister_task_impl(PyObject *module, PyObject *task)
|
|
/*[clinic end generated code: output=6e5585706d568a46 input=28fb98c3975f7bdc]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state(module);
|
|
if (Task_Check(state, task)) {
|
|
unregister_task(state, (TaskObj *)task);
|
|
Py_RETURN_NONE;
|
|
}
|
|
PyObject *res = PyObject_CallMethodOneArg(state->non_asyncio_tasks,
|
|
&_Py_ID(discard), task);
|
|
if (res == NULL) {
|
|
return NULL;
|
|
}
|
|
Py_DECREF(res);
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_asyncio._unregister_eager_task
|
|
|
|
task: object
|
|
|
|
Unregister a task.
|
|
|
|
Returns None.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio__unregister_eager_task_impl(PyObject *module, PyObject *task)
|
|
/*[clinic end generated code: output=a426922bd07f23d1 input=9d07401ef14ee048]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state(module);
|
|
if (unregister_eager_task(state, task) < 0) {
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
_asyncio._enter_task
|
|
|
|
loop: object
|
|
task: object
|
|
|
|
Enter into task execution or resume suspended task.
|
|
|
|
Task belongs to loop.
|
|
|
|
Returns None.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio__enter_task_impl(PyObject *module, PyObject *loop, PyObject *task)
|
|
/*[clinic end generated code: output=a22611c858035b73 input=de1b06dca70d8737]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state(module);
|
|
if (enter_task(state, loop, task) < 0) {
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
_asyncio._leave_task
|
|
|
|
loop: object
|
|
task: object
|
|
|
|
Leave task execution or suspend a task.
|
|
|
|
Task belongs to loop.
|
|
|
|
Returns None.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio__leave_task_impl(PyObject *module, PyObject *loop, PyObject *task)
|
|
/*[clinic end generated code: output=0ebf6db4b858fb41 input=51296a46313d1ad8]*/
|
|
{
|
|
asyncio_state *state = get_asyncio_state(module);
|
|
if (leave_task(state, loop, task) < 0) {
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
_asyncio._swap_current_task
|
|
|
|
loop: object
|
|
task: object
|
|
|
|
Temporarily swap in the supplied task and return the original one (or None).
|
|
|
|
This is intended for use during eager coroutine execution.
|
|
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio__swap_current_task_impl(PyObject *module, PyObject *loop,
|
|
PyObject *task)
|
|
/*[clinic end generated code: output=9f88de958df74c7e input=c9c72208d3d38b6c]*/
|
|
{
|
|
return swap_current_task(get_asyncio_state(module), loop, task);
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
_asyncio.current_task
|
|
|
|
loop: object = None
|
|
|
|
Return a currently executed task.
|
|
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_current_task_impl(PyObject *module, PyObject *loop)
|
|
/*[clinic end generated code: output=fe15ac331a7f981a input=58910f61a5627112]*/
|
|
{
|
|
PyObject *ret;
|
|
asyncio_state *state = get_asyncio_state(module);
|
|
|
|
if (loop == Py_None) {
|
|
loop = _asyncio_get_running_loop_impl(module);
|
|
if (loop == NULL) {
|
|
return NULL;
|
|
}
|
|
} else {
|
|
Py_INCREF(loop);
|
|
}
|
|
|
|
int rc = PyDict_GetItemRef(state->current_tasks, loop, &ret);
|
|
Py_DECREF(loop);
|
|
if (rc == 0) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
static inline int
|
|
add_one_task(asyncio_state *state, PyObject *tasks, PyObject *task, PyObject *loop)
|
|
{
|
|
PyObject *done = PyObject_CallMethodNoArgs(task, &_Py_ID(done));
|
|
if (done == NULL) {
|
|
return -1;
|
|
}
|
|
if (Py_IsTrue(done)) {
|
|
return 0;
|
|
}
|
|
Py_DECREF(done);
|
|
PyObject *task_loop = get_future_loop(state, task);
|
|
if (task_loop == NULL) {
|
|
return -1;
|
|
}
|
|
if (task_loop == loop) {
|
|
if (PySet_Add(tasks, task) < 0) {
|
|
Py_DECREF(task_loop);
|
|
return -1;
|
|
}
|
|
}
|
|
Py_DECREF(task_loop);
|
|
return 0;
|
|
}
|
|
|
|
/*********************** Module **************************/
|
|
|
|
/*[clinic input]
|
|
_asyncio.all_tasks
|
|
|
|
loop: object = None
|
|
|
|
Return a set of all tasks for the loop.
|
|
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_asyncio_all_tasks_impl(PyObject *module, PyObject *loop)
|
|
/*[clinic end generated code: output=0e107cbb7f72aa7b input=43a1b423c2d95bfa]*/
|
|
{
|
|
|
|
asyncio_state *state = get_asyncio_state(module);
|
|
PyObject *tasks = PySet_New(NULL);
|
|
if (tasks == NULL) {
|
|
return NULL;
|
|
}
|
|
if (loop == Py_None) {
|
|
loop = _asyncio_get_running_loop_impl(module);
|
|
if (loop == NULL) {
|
|
Py_DECREF(tasks);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
Py_INCREF(loop);
|
|
}
|
|
// First add eager tasks to the set so that we don't miss
|
|
// any tasks which graduates from eager to non-eager
|
|
PyObject *eager_iter = PyObject_GetIter(state->eager_tasks);
|
|
if (eager_iter == NULL) {
|
|
Py_DECREF(tasks);
|
|
Py_DECREF(loop);
|
|
return NULL;
|
|
}
|
|
PyObject *item;
|
|
while ((item = PyIter_Next(eager_iter)) != NULL) {
|
|
if (add_one_task(state, tasks, item, loop) < 0) {
|
|
Py_DECREF(tasks);
|
|
Py_DECREF(loop);
|
|
Py_DECREF(item);
|
|
Py_DECREF(eager_iter);
|
|
return NULL;
|
|
}
|
|
Py_DECREF(item);
|
|
}
|
|
Py_DECREF(eager_iter);
|
|
int err = 0;
|
|
ASYNCIO_STATE_LOCK(state);
|
|
TaskObj *head = state->asyncio_tasks.head;
|
|
Py_INCREF(head);
|
|
assert(head != NULL);
|
|
assert(head->prev == NULL);
|
|
TaskObj *tail = &state->asyncio_tasks.tail;
|
|
while (head != tail)
|
|
{
|
|
if (add_one_task(state, tasks, (PyObject *)head, loop) < 0) {
|
|
Py_DECREF(tasks);
|
|
Py_DECREF(loop);
|
|
Py_DECREF(head);
|
|
err = 1;
|
|
break;
|
|
}
|
|
Py_INCREF(head->next);
|
|
Py_SETREF(head, head->next);
|
|
}
|
|
ASYNCIO_STATE_UNLOCK(state);
|
|
if (err) {
|
|
return NULL;
|
|
}
|
|
PyObject *scheduled_iter = PyObject_GetIter(state->non_asyncio_tasks);
|
|
if (scheduled_iter == NULL) {
|
|
Py_DECREF(tasks);
|
|
Py_DECREF(loop);
|
|
return NULL;
|
|
}
|
|
while ((item = PyIter_Next(scheduled_iter)) != NULL) {
|
|
if (add_one_task(state, tasks, item, loop) < 0) {
|
|
Py_DECREF(tasks);
|
|
Py_DECREF(loop);
|
|
Py_DECREF(item);
|
|
Py_DECREF(scheduled_iter);
|
|
return NULL;
|
|
}
|
|
Py_DECREF(item);
|
|
}
|
|
Py_DECREF(scheduled_iter);
|
|
Py_DECREF(loop);
|
|
return tasks;
|
|
}
|
|
|
|
static int
|
|
module_traverse(PyObject *mod, visitproc visit, void *arg)
|
|
{
|
|
asyncio_state *state = get_asyncio_state(mod);
|
|
|
|
Py_VISIT(state->FutureIterType);
|
|
Py_VISIT(state->TaskStepMethWrapper_Type);
|
|
Py_VISIT(state->FutureType);
|
|
Py_VISIT(state->TaskType);
|
|
|
|
Py_VISIT(state->asyncio_mod);
|
|
Py_VISIT(state->traceback_extract_stack);
|
|
Py_VISIT(state->asyncio_future_repr_func);
|
|
Py_VISIT(state->asyncio_get_event_loop_policy);
|
|
Py_VISIT(state->asyncio_iscoroutine_func);
|
|
Py_VISIT(state->asyncio_task_get_stack_func);
|
|
Py_VISIT(state->asyncio_task_print_stack_func);
|
|
Py_VISIT(state->asyncio_task_repr_func);
|
|
Py_VISIT(state->asyncio_InvalidStateError);
|
|
Py_VISIT(state->asyncio_CancelledError);
|
|
|
|
Py_VISIT(state->non_asyncio_tasks);
|
|
Py_VISIT(state->eager_tasks);
|
|
Py_VISIT(state->current_tasks);
|
|
Py_VISIT(state->iscoroutine_typecache);
|
|
|
|
Py_VISIT(state->context_kwname);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
module_clear(PyObject *mod)
|
|
{
|
|
asyncio_state *state = get_asyncio_state(mod);
|
|
|
|
Py_CLEAR(state->FutureIterType);
|
|
Py_CLEAR(state->TaskStepMethWrapper_Type);
|
|
Py_CLEAR(state->FutureType);
|
|
Py_CLEAR(state->TaskType);
|
|
|
|
Py_CLEAR(state->asyncio_mod);
|
|
Py_CLEAR(state->traceback_extract_stack);
|
|
Py_CLEAR(state->asyncio_future_repr_func);
|
|
Py_CLEAR(state->asyncio_get_event_loop_policy);
|
|
Py_CLEAR(state->asyncio_iscoroutine_func);
|
|
Py_CLEAR(state->asyncio_task_get_stack_func);
|
|
Py_CLEAR(state->asyncio_task_print_stack_func);
|
|
Py_CLEAR(state->asyncio_task_repr_func);
|
|
Py_CLEAR(state->asyncio_InvalidStateError);
|
|
Py_CLEAR(state->asyncio_CancelledError);
|
|
|
|
Py_CLEAR(state->non_asyncio_tasks);
|
|
Py_CLEAR(state->eager_tasks);
|
|
Py_CLEAR(state->current_tasks);
|
|
Py_CLEAR(state->iscoroutine_typecache);
|
|
|
|
Py_CLEAR(state->context_kwname);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
module_free(void *mod)
|
|
{
|
|
(void)module_clear((PyObject *)mod);
|
|
}
|
|
|
|
static int
|
|
module_init(asyncio_state *state)
|
|
{
|
|
PyObject *module = NULL;
|
|
|
|
state->asyncio_mod = PyImport_ImportModule("asyncio");
|
|
if (state->asyncio_mod == NULL) {
|
|
goto fail;
|
|
}
|
|
|
|
state->current_tasks = PyDict_New();
|
|
if (state->current_tasks == NULL) {
|
|
goto fail;
|
|
}
|
|
|
|
state->iscoroutine_typecache = PySet_New(NULL);
|
|
if (state->iscoroutine_typecache == NULL) {
|
|
goto fail;
|
|
}
|
|
|
|
|
|
state->context_kwname = Py_BuildValue("(s)", "context");
|
|
if (state->context_kwname == NULL) {
|
|
goto fail;
|
|
}
|
|
|
|
#define WITH_MOD(NAME) \
|
|
Py_CLEAR(module); \
|
|
module = PyImport_ImportModule(NAME); \
|
|
if (module == NULL) { \
|
|
goto fail; \
|
|
}
|
|
|
|
#define GET_MOD_ATTR(VAR, NAME) \
|
|
VAR = PyObject_GetAttrString(module, NAME); \
|
|
if (VAR == NULL) { \
|
|
goto fail; \
|
|
}
|
|
|
|
WITH_MOD("asyncio.events")
|
|
GET_MOD_ATTR(state->asyncio_get_event_loop_policy, "get_event_loop_policy")
|
|
|
|
WITH_MOD("asyncio.base_futures")
|
|
GET_MOD_ATTR(state->asyncio_future_repr_func, "_future_repr")
|
|
|
|
WITH_MOD("asyncio.exceptions")
|
|
GET_MOD_ATTR(state->asyncio_InvalidStateError, "InvalidStateError")
|
|
GET_MOD_ATTR(state->asyncio_CancelledError, "CancelledError")
|
|
|
|
WITH_MOD("asyncio.base_tasks")
|
|
GET_MOD_ATTR(state->asyncio_task_repr_func, "_task_repr")
|
|
GET_MOD_ATTR(state->asyncio_task_get_stack_func, "_task_get_stack")
|
|
GET_MOD_ATTR(state->asyncio_task_print_stack_func, "_task_print_stack")
|
|
|
|
WITH_MOD("asyncio.coroutines")
|
|
GET_MOD_ATTR(state->asyncio_iscoroutine_func, "iscoroutine")
|
|
|
|
WITH_MOD("traceback")
|
|
GET_MOD_ATTR(state->traceback_extract_stack, "extract_stack")
|
|
|
|
PyObject *weak_set;
|
|
WITH_MOD("weakref")
|
|
GET_MOD_ATTR(weak_set, "WeakSet");
|
|
state->non_asyncio_tasks = PyObject_CallNoArgs(weak_set);
|
|
Py_CLEAR(weak_set);
|
|
if (state->non_asyncio_tasks == NULL) {
|
|
goto fail;
|
|
}
|
|
|
|
state->eager_tasks = PySet_New(NULL);
|
|
if (state->eager_tasks == NULL) {
|
|
goto fail;
|
|
}
|
|
|
|
Py_DECREF(module);
|
|
return 0;
|
|
|
|
fail:
|
|
Py_CLEAR(module);
|
|
return -1;
|
|
|
|
#undef WITH_MOD
|
|
#undef GET_MOD_ATTR
|
|
}
|
|
|
|
PyDoc_STRVAR(module_doc, "Accelerator module for asyncio");
|
|
|
|
static PyMethodDef asyncio_methods[] = {
|
|
_ASYNCIO_CURRENT_TASK_METHODDEF
|
|
_ASYNCIO_GET_EVENT_LOOP_METHODDEF
|
|
_ASYNCIO_GET_RUNNING_LOOP_METHODDEF
|
|
_ASYNCIO__GET_RUNNING_LOOP_METHODDEF
|
|
_ASYNCIO__SET_RUNNING_LOOP_METHODDEF
|
|
_ASYNCIO__REGISTER_TASK_METHODDEF
|
|
_ASYNCIO__REGISTER_EAGER_TASK_METHODDEF
|
|
_ASYNCIO__UNREGISTER_TASK_METHODDEF
|
|
_ASYNCIO__UNREGISTER_EAGER_TASK_METHODDEF
|
|
_ASYNCIO__ENTER_TASK_METHODDEF
|
|
_ASYNCIO__LEAVE_TASK_METHODDEF
|
|
_ASYNCIO__SWAP_CURRENT_TASK_METHODDEF
|
|
_ASYNCIO_ALL_TASKS_METHODDEF
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static int
|
|
module_exec(PyObject *mod)
|
|
{
|
|
asyncio_state *state = get_asyncio_state(mod);
|
|
Py_SET_TYPE(&state->asyncio_tasks.tail, state->TaskType);
|
|
_Py_SetImmortalUntracked((PyObject *)&state->asyncio_tasks.tail);
|
|
state->asyncio_tasks.head = &state->asyncio_tasks.tail;
|
|
|
|
#define CREATE_TYPE(m, tp, spec, base) \
|
|
do { \
|
|
tp = (PyTypeObject *)PyType_FromMetaclass(NULL, m, spec, \
|
|
(PyObject *)base); \
|
|
if (tp == NULL) { \
|
|
return -1; \
|
|
} \
|
|
} while (0)
|
|
|
|
CREATE_TYPE(mod, state->TaskStepMethWrapper_Type, &TaskStepMethWrapper_spec, NULL);
|
|
CREATE_TYPE(mod, state->FutureIterType, &FutureIter_spec, NULL);
|
|
CREATE_TYPE(mod, state->FutureType, &Future_spec, NULL);
|
|
CREATE_TYPE(mod, state->TaskType, &Task_spec, state->FutureType);
|
|
|
|
#undef CREATE_TYPE
|
|
|
|
if (PyModule_AddType(mod, state->FutureType) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (PyModule_AddType(mod, state->TaskType) < 0) {
|
|
return -1;
|
|
}
|
|
// Must be done after types are added to avoid a circular dependency
|
|
if (module_init(state) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (PyModule_AddObjectRef(mod, "_scheduled_tasks", state->non_asyncio_tasks) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (PyModule_AddObjectRef(mod, "_eager_tasks", state->eager_tasks) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (PyModule_AddObjectRef(mod, "_current_tasks", state->current_tasks) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct PyModuleDef_Slot module_slots[] = {
|
|
{Py_mod_exec, module_exec},
|
|
{Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
|
|
{Py_mod_gil, Py_MOD_GIL_NOT_USED},
|
|
{0, NULL},
|
|
};
|
|
|
|
static struct PyModuleDef _asynciomodule = {
|
|
.m_base = PyModuleDef_HEAD_INIT,
|
|
.m_name = "_asyncio",
|
|
.m_doc = module_doc,
|
|
.m_size = sizeof(asyncio_state),
|
|
.m_methods = asyncio_methods,
|
|
.m_slots = module_slots,
|
|
.m_traverse = module_traverse,
|
|
.m_clear = module_clear,
|
|
.m_free = (freefunc)module_free,
|
|
};
|
|
|
|
PyMODINIT_FUNC
|
|
PyInit__asyncio(void)
|
|
{
|
|
return PyModuleDef_Init(&_asynciomodule);
|
|
}
|