Php/docs/function.sem-release

• PHP Manual
• Semaphore 函数
• Release a semaphore

sem_release

(PHP 4, PHP 5, PHP 7)

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

• sem_get() - Get a semaphore id
• sem_acquire() - Acquire a semaphore