sem_release

(PHP 4, PHP 5, PHP 7, PHP 8)

sem_release — Release a semaphore

说明

sem_release(SysvSemaphore $semaphore): 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

semaphore

A Semaphore as returned by sem_get().

返回值

成功时返回 true， 或者在失败时返回 false。

更新日志

版本 说明
8.0.0 semaphore expects a SysvSemaphore instance now; previously, a resource was expected.

参见