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[3.14] gh-134009: Expose PyMutex_IsLocked in the public C API (gh-134365) (#136971)

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Co-authored-by: Sam Gross <colesbury@gmail.com>
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Hugo van Kemenade 2025-07-22 12:48:08 +03:00 • committed by GitHub
parent 11f510167c
commit 8e43b130f7
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6 changed files with 33 additions and 7 deletions
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11
Include/cpython/lock.h
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@ -36,6 +36,9 @@ PyAPI_FUNC(void) PyMutex_Lock(PyMutex *m);
// exported function for unlocking the mutex
PyAPI_FUNC(void) PyMutex_Unlock(PyMutex *m);
// exported function for checking if the mutex is locked
PyAPI_FUNC(int) PyMutex_IsLocked(PyMutex *m);
// Locks the mutex.
//
// If the mutex is currently locked, the calling thread will be parked until
@ -61,3 +64,11 @@ _PyMutex_Unlock(PyMutex *m)
}
}
#define PyMutex_Unlock _PyMutex_Unlock
// Checks if the mutex is currently locked.
static inline int
_PyMutex_IsLocked(PyMutex *m)
{
return (_Py_atomic_load_uint8(&m->_bits) & _Py_LOCKED) != 0;
}
#define PyMutex_IsLocked _PyMutex_IsLocked

7
Include/internal/pycore_lock.h
View file

@ -25,13 +25,6 @@ PyMutex_LockFast(PyMutex *m)
return _Py_atomic_compare_exchange_uint8(lock_bits, &expected, _Py_LOCKED);
}
// Checks if the mutex is currently locked.
static inline int
PyMutex_IsLocked(PyMutex *m)
{
return (_Py_atomic_load_uint8(&m->_bits) & _Py_LOCKED) != 0;
}
// Re-initializes the mutex after a fork to the unlocked state.
static inline void
_PyMutex_at_fork_reinit(PyMutex *m)