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Revert "bpo-33608: Factor out a private, per-interpreter _Py_AddPendingCall(). (gh-13714)" (GH-13780)

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This reverts commit 6a150bcaeb.
This commit is contained in:
Victor Stinner 2019-06-03 18:14:24 +02:00 • committed by GitHub
parent 49a7e34797
commit e225bebc14
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 185 additions and 320 deletions
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68
Python/pystate.c
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@ -218,13 +218,6 @@ PyInterpreterState_New(void)
return NULL;
}
interp->ceval.pending.lock = PyThread_allocate_lock();
if (interp->ceval.pending.lock == NULL) {
PyErr_SetString(PyExc_RuntimeError,
"failed to create interpreter ceval pending mutex");
return NULL;
}
interp->eval_frame = _PyEval_EvalFrameDefault;
#ifdef HAVE_DLOPEN
#if HAVE_DECL_RTLD_NOW
@ -352,10 +345,6 @@ PyInterpreterState_Delete(PyInterpreterState *interp)
if (interp->id_mutex != NULL) {
PyThread_free_lock(interp->id_mutex);
}
if (interp->ceval.pending.lock != NULL) {
PyThread_free_lock(interp->ceval.pending.lock);
interp->ceval.pending.lock = NULL;
}
PyMem_RawFree(interp);
}
@ -1025,7 +1014,7 @@ PyThreadState_SetAsyncExc(unsigned long id, PyObject *exc)
p->async_exc = exc;
HEAD_UNLOCK(runtime);
Py_XDECREF(old_exc);
_PyEval_SignalAsyncExc(&runtime->ceval, &interp->ceval);
_PyEval_SignalAsyncExc(&runtime->ceval);
return 1;
}
}
@ -1455,7 +1444,7 @@ _PyObject_GetCrossInterpreterData(PyObject *obj, _PyCrossInterpreterData *data)
return 0;
}
static int
static void
_release_xidata(void *arg)
{
_PyCrossInterpreterData *data = (_PyCrossInterpreterData *)arg;
@ -1463,21 +1452,42 @@ _release_xidata(void *arg)
data->free(data->data);
}
Py_XDECREF(data->obj);
PyMem_Free(data);
return 0;
}
static void
_call_in_interpreter(struct _gilstate_runtime_state *gilstate,
PyInterpreterState *interp,
void (*func)(void *), void *arg)
{
/* We would use Py_AddPendingCall() if it weren't specific to the
* main interpreter (see bpo-33608). In the meantime we take a
* naive approach.
*/
PyThreadState *save_tstate = NULL;
if (interp != _PyRuntimeGILState_GetThreadState(gilstate)->interp) {
// XXX Using the "head" thread isn't strictly correct.
PyThreadState *tstate = PyInterpreterState_ThreadHead(interp);
// XXX Possible GILState issues?
save_tstate = _PyThreadState_Swap(gilstate, tstate);
}
func(arg);
// Switch back.
if (save_tstate != NULL) {
_PyThreadState_Swap(gilstate, save_tstate);
}
}
void
_PyCrossInterpreterData_Release(_PyCrossInterpreterData *data)
{
_PyRuntimeState *runtime = &_PyRuntime;
if (data->data == NULL && data->obj == NULL) {
// Nothing to release!
return;
}
// Get the original interpreter.
// Switch to the original interpreter.
PyInterpreterState *interp = _PyInterpreterState_LookUpID(data->interp);
if (interp == NULL) {
// The intepreter was already destroyed.
@ -1486,28 +1496,10 @@ _PyCrossInterpreterData_Release(_PyCrossInterpreterData *data)
}
return;
}
// XXX There's an ever-so-slight race here...
if (interp->finalizing) {
// XXX Someone leaked some memory...
return;
}
// "Release" the data and/or the object.
_PyCrossInterpreterData *copied = PyMem_Malloc(sizeof(_PyCrossInterpreterData));
if (copied == NULL) {
PyErr_SetString(PyExc_MemoryError,
"Not enough memory to preserve cross-interpreter data");
PyErr_Print();
return;
}
memcpy(copied, data, sizeof(_PyCrossInterpreterData));
PyThreadState *tstate = _PyRuntimeState_GetThreadState(runtime);
int res = _PyEval_AddPendingCall(tstate,
&runtime->ceval, &interp->ceval,
0, _release_xidata, copied);
if (res != 0) {
// XXX Queue full or couldn't get lock. Try again somehow?
}
struct _gilstate_runtime_state *gilstate = &_PyRuntime.gilstate;
_call_in_interpreter(gilstate, interp, _release_xidata, data);
}
PyObject *