msg_stat_queue
Just to clarify what is meant by "process" above:
On the Apache webserver, many PHP requests will be executed within the same process space because it is multithreaded. However, any semaphores got and acquired by a script and not released and removed will still be automatically cleaned up by the PHP interpreter each time the script terminates.
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sem_acquire
(PHP 4, PHP 5)
sem_acquire — Acquire a semaphore
설명
bool sem_acquire
( resource $sem_identifier
)
sem_acquire() blocks (if necessary) until the semaphore can be acquired. A process attempting to acquire a semaphore which it has already acquired will block forever if acquiring the semaphore would cause its maximum number of semaphore to be exceeded.
After processing a request, any semaphores acquired by the process but not explicitly released will be released automatically and a warning will be generated.
반환값
성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.
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User Contributed Notessem_acquire
gladd at trash dot eris dot qinetiq dot com
13-Apr-2004 09:02
13-Apr-2004 09:02