sem_release

(PHP 4, PHP 5, PHP 7)

sem_release — Release a semaphore

说明

sem_release ( resource $sem_identifier ) : bool

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

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