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Add _PyThreadState_UncheckedGet()

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Issue #26154: Add a new private _PyThreadState_UncheckedGet() function which
gets the current thread state, but don't call Py_FatalError() if it is NULL.

Python 3.5.1 removed the _PyThreadState_Current symbol from the Python C API to
no more expose complex and private atomic types. Atomic types depends on the
compiler or can even depend on compiler options. The new function
_PyThreadState_UncheckedGet() allows to get the variable value without having
to care of the exact implementation of atomic types.

Changes:

* Replace direct usage of the _PyThreadState_Current variable with a call to
  _PyThreadState_UncheckedGet().
* In pystate.c, replace direct usage of the _PyThreadState_Current variable
  with the PyThreadState_GET() macro for readability.
* Document also PyThreadState_Get() in pystate.h
This commit is contained in:
Victor Stinner 2016-01-20 11:12:38 +01:00
parent aebb6d3682
commit bfd316e750
7 changed files with 42 additions and 26 deletions
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10
Include/pystate.h
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@ -168,7 +168,17 @@ PyAPI_FUNC(void) PyThreadState_DeleteCurrent(void);
PyAPI_FUNC(void) _PyGILState_Reinit(void);
#endif
/* Return the current thread state. The global interpreter lock must be held.
* When the current thread state is NULL, this issues a fatal error (so that
* the caller needn't check for NULL). */
PyAPI_FUNC(PyThreadState *) PyThreadState_Get(void);
#ifdef WITH_THREAD
/* Similar to PyThreadState_Get(), but don't issue a fatal error
* if it is NULL. */
PyAPI_FUNC(PyThreadState *) _PyThreadState_UncheckedGet(void);
#endif
PyAPI_FUNC(PyThreadState *) PyThreadState_Swap(PyThreadState *);
PyAPI_FUNC(PyObject *) PyThreadState_GetDict(void);
PyAPI_FUNC(int) PyThreadState_SetAsyncExc(long, PyObject *);