diff options
Diffstat (limited to 'Python/thread_nt.h')
-rw-r--r-- | Python/thread_nt.h | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/Python/thread_nt.h b/Python/thread_nt.h index e078b98be3c..9a29d14ef67 100644 --- a/Python/thread_nt.h +++ b/Python/thread_nt.h @@ -300,98 +300,6 @@ PyThread_hang_thread(void) } } -/* - * Lock support. It has to be implemented as semaphores. - * I [Dag] tried to implement it with mutex but I could find a way to - * tell whether a thread already own the lock or not. - */ -PyThread_type_lock -PyThread_allocate_lock(void) -{ - PNRMUTEX mutex; - - if (!initialized) - PyThread_init_thread(); - - mutex = AllocNonRecursiveMutex() ; - - PyThread_type_lock aLock = (PyThread_type_lock) mutex; - assert(aLock); - - return aLock; -} - -void -PyThread_free_lock(PyThread_type_lock aLock) -{ - FreeNonRecursiveMutex(aLock) ; -} - -// WaitForSingleObject() accepts timeout in milliseconds in the range -// [0; 0xFFFFFFFE] (DWORD type). INFINITE value (0xFFFFFFFF) means no -// timeout. 0xFFFFFFFE milliseconds is around 49.7 days. -const DWORD TIMEOUT_MS_MAX = 0xFFFFFFFE; - -/* - * Return 1 on success if the lock was acquired - * - * and 0 if the lock was not acquired. This means a 0 is returned - * if the lock has already been acquired by this thread! - */ -PyLockStatus -PyThread_acquire_lock_timed(PyThread_type_lock aLock, - PY_TIMEOUT_T microseconds, int intr_flag) -{ - assert(aLock); - - /* Fow now, intr_flag does nothing on Windows, and lock acquires are - * uninterruptible. */ - PyLockStatus success; - PY_TIMEOUT_T milliseconds; - - if (microseconds >= 0) { - milliseconds = microseconds / 1000; - // Round milliseconds away from zero - if (microseconds % 1000 > 0) { - milliseconds++; - } - if (milliseconds > (PY_TIMEOUT_T)TIMEOUT_MS_MAX) { - // bpo-41710: PyThread_acquire_lock_timed() cannot report timeout - // overflow to the caller, so clamp the timeout to - // [0, TIMEOUT_MS_MAX] milliseconds. - // - // _thread.Lock.acquire() and _thread.RLock.acquire() raise an - // OverflowError if microseconds is greater than PY_TIMEOUT_MAX. - milliseconds = TIMEOUT_MS_MAX; - } - assert(milliseconds != INFINITE); - } - else { - milliseconds = INFINITE; - } - - if (EnterNonRecursiveMutex((PNRMUTEX)aLock, - (DWORD)milliseconds) == WAIT_OBJECT_0) { - success = PY_LOCK_ACQUIRED; - } - else { - success = PY_LOCK_FAILURE; - } - - return success; -} -int -PyThread_acquire_lock(PyThread_type_lock aLock, int waitflag) -{ - return PyThread_acquire_lock_timed(aLock, waitflag ? -1 : 0, 0); -} - -void -PyThread_release_lock(PyThread_type_lock aLock) -{ - assert(aLock); - (void)LeaveNonRecursiveMutex((PNRMUTEX) aLock); -} /* minimum/maximum thread stack sizes supported */ #define THREAD_MIN_STACKSIZE 0x8000 /* 32 KiB */ |