sem_release
(PHP 4, PHP 5)
sem_release — Release a semaphore
说明
bool sem_release ( resource $sem_identifier )sem_release() releases the semaphore if it is currently acquired by the calling process, otherwise a warning is generated.
After releasing the semaphore, sem_acquire() may be called to re-acquire it.
参数
- sem_identifier
-
A Semaphore resource handle as returned by sem_get().
返回值
成功时返回 TRUE， 或者在失败时返回 FALSE.
参见
- sem_get() - Get a semaphore id
- sem_acquire() - Acquire a semaphore
