diff options
Diffstat (limited to 'Include/cpython/lock.h')
| -rw-r--r-- | Include/cpython/lock.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Include/cpython/lock.h b/Include/cpython/lock.h index 8ee03e82f74..63886fca28e 100644 --- a/Include/cpython/lock.h +++ b/Include/cpython/lock.h @@ -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 |