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cf6110ba13
This replaces some usages of PyThread_type_lock with PyMutex, which does not require memory allocation to initialize. This simplifies some of the runtime initialization and is also one step towards avoiding changing the default raw memory allocator during initialize/finalization, which can be non-thread-safe in some circumstances.
214 lines
7.3 KiB
C
214 lines
7.3 KiB
C
#ifndef Py_LIMITED_API
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#ifndef Py_INTERNAL_IMPORT_H
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#define Py_INTERNAL_IMPORT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef Py_BUILD_CORE
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# error "this header requires Py_BUILD_CORE define"
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#endif
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#include "pycore_lock.h" // PyMutex
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#include "pycore_hashtable.h" // _Py_hashtable_t
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#include "pycore_time.h" // _PyTime_t
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extern int _PyImport_IsInitialized(PyInterpreterState *);
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// Export for 'pyexpat' shared extension
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PyAPI_FUNC(int) _PyImport_SetModule(PyObject *name, PyObject *module);
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extern int _PyImport_SetModuleString(const char *name, PyObject* module);
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extern void _PyImport_AcquireLock(PyInterpreterState *interp);
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extern int _PyImport_ReleaseLock(PyInterpreterState *interp);
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extern int _PyImport_FixupBuiltin(
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PyObject *mod,
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const char *name, /* UTF-8 encoded string */
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PyObject *modules
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);
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extern int _PyImport_FixupExtensionObject(PyObject*, PyObject *,
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PyObject *, PyObject *);
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// Export for many shared extensions, like '_json'
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PyAPI_FUNC(PyObject*) _PyImport_GetModuleAttr(PyObject *, PyObject *);
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// Export for many shared extensions, like '_datetime'
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PyAPI_FUNC(PyObject*) _PyImport_GetModuleAttrString(const char *, const char *);
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struct _import_runtime_state {
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/* The builtin modules (defined in config.c). */
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struct _inittab *inittab;
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/* The most recent value assigned to a PyModuleDef.m_base.m_index.
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This is incremented each time PyModuleDef_Init() is called,
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which is just about every time an extension module is imported.
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See PyInterpreterState.modules_by_index for more info. */
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Py_ssize_t last_module_index;
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struct {
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/* A lock to guard the cache. */
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PyMutex mutex;
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/* The actual cache of (filename, name, PyModuleDef) for modules.
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Only legacy (single-phase init) extension modules are added
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and only if they support multiple initialization (m_size >- 0)
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or are imported in the main interpreter.
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This is initialized lazily in _PyImport_FixupExtensionObject().
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Modules are added there and looked up in _imp.find_extension(). */
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_Py_hashtable_t *hashtable;
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} extensions;
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/* Package context -- the full module name for package imports */
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const char * pkgcontext;
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};
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struct _import_state {
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/* cached sys.modules dictionary */
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PyObject *modules;
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/* This is the list of module objects for all legacy (single-phase init)
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extension modules ever loaded in this process (i.e. imported
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in this interpreter or in any other). Py_None stands in for
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modules that haven't actually been imported in this interpreter.
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A module's index (PyModuleDef.m_base.m_index) is used to look up
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the corresponding module object for this interpreter, if any.
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(See PyState_FindModule().) When any extension module
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is initialized during import, its moduledef gets initialized by
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PyModuleDef_Init(), and the first time that happens for each
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PyModuleDef, its index gets set to the current value of
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a global counter (see _PyRuntimeState.imports.last_module_index).
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The entry for that index in this interpreter remains unset until
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the module is actually imported here. (Py_None is used as
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a placeholder.) Note that multi-phase init modules always get
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an index for which there will never be a module set.
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This is initialized lazily in PyState_AddModule(), which is also
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where modules get added. */
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PyObject *modules_by_index;
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/* importlib module._bootstrap */
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PyObject *importlib;
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/* override for config->use_frozen_modules (for tests)
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(-1: "off", 1: "on", 0: no override) */
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int override_frozen_modules;
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int override_multi_interp_extensions_check;
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#ifdef HAVE_DLOPEN
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int dlopenflags;
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#endif
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PyObject *import_func;
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/* The global import lock. */
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struct {
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PyThread_type_lock mutex;
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unsigned long thread;
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int level;
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} lock;
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/* diagnostic info in PyImport_ImportModuleLevelObject() */
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struct {
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int import_level;
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_PyTime_t accumulated;
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int header;
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} find_and_load;
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};
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#ifdef HAVE_DLOPEN
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# include <dlfcn.h> // RTLD_NOW, RTLD_LAZY
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# if HAVE_DECL_RTLD_NOW
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# define _Py_DLOPEN_FLAGS RTLD_NOW
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# else
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# define _Py_DLOPEN_FLAGS RTLD_LAZY
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# endif
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# define DLOPENFLAGS_INIT .dlopenflags = _Py_DLOPEN_FLAGS,
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#else
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# define _Py_DLOPEN_FLAGS 0
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# define DLOPENFLAGS_INIT
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#endif
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#define IMPORTS_INIT \
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{ \
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DLOPENFLAGS_INIT \
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.lock = { \
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.mutex = NULL, \
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.thread = PYTHREAD_INVALID_THREAD_ID, \
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.level = 0, \
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}, \
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.find_and_load = { \
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.header = 1, \
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}, \
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}
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extern void _PyImport_ClearCore(PyInterpreterState *interp);
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extern Py_ssize_t _PyImport_GetNextModuleIndex(void);
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extern const char * _PyImport_ResolveNameWithPackageContext(const char *name);
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extern const char * _PyImport_SwapPackageContext(const char *newcontext);
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extern int _PyImport_GetDLOpenFlags(PyInterpreterState *interp);
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extern void _PyImport_SetDLOpenFlags(PyInterpreterState *interp, int new_val);
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extern PyObject * _PyImport_InitModules(PyInterpreterState *interp);
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extern PyObject * _PyImport_GetModules(PyInterpreterState *interp);
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extern void _PyImport_ClearModules(PyInterpreterState *interp);
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extern void _PyImport_ClearModulesByIndex(PyInterpreterState *interp);
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extern int _PyImport_InitDefaultImportFunc(PyInterpreterState *interp);
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extern int _PyImport_IsDefaultImportFunc(
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PyInterpreterState *interp,
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PyObject *func);
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extern PyObject * _PyImport_GetImportlibLoader(
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PyInterpreterState *interp,
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const char *loader_name);
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extern PyObject * _PyImport_GetImportlibExternalLoader(
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PyInterpreterState *interp,
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const char *loader_name);
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extern PyObject * _PyImport_BlessMyLoader(
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PyInterpreterState *interp,
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PyObject *module_globals);
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extern PyObject * _PyImport_ImportlibModuleRepr(
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PyInterpreterState *interp,
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PyObject *module);
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extern PyStatus _PyImport_Init(void);
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extern void _PyImport_Fini(void);
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extern void _PyImport_Fini2(void);
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extern PyStatus _PyImport_InitCore(
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PyThreadState *tstate,
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PyObject *sysmod,
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int importlib);
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extern PyStatus _PyImport_InitExternal(PyThreadState *tstate);
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extern void _PyImport_FiniCore(PyInterpreterState *interp);
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extern void _PyImport_FiniExternal(PyInterpreterState *interp);
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#ifdef HAVE_FORK
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extern PyStatus _PyImport_ReInitLock(PyInterpreterState *interp);
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#endif
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extern PyObject* _PyImport_GetBuiltinModuleNames(void);
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struct _module_alias {
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const char *name; /* ASCII encoded string */
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const char *orig; /* ASCII encoded string */
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};
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// Export these 3 symbols for test_ctypes
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PyAPI_DATA(const struct _frozen*) _PyImport_FrozenBootstrap;
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PyAPI_DATA(const struct _frozen*) _PyImport_FrozenStdlib;
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PyAPI_DATA(const struct _frozen*) _PyImport_FrozenTest;
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extern const struct _module_alias * _PyImport_FrozenAliases;
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extern int _PyImport_CheckSubinterpIncompatibleExtensionAllowed(
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const char *name);
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// Export for '_testinternalcapi' shared extension
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PyAPI_FUNC(int) _PyImport_ClearExtension(PyObject *name, PyObject *filename);
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_INTERNAL_IMPORT_H */
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#endif /* !Py_LIMITED_API */
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