SyncSemaphore::lock

(PECL sync >= 1.0.0)

SyncSemaphore::lock — Decreases the count of the semaphore or waits

説明

public function SyncSemaphore::lock(int $wait = -1): bool

Decreases the count of a SyncSemaphore object or waits until the semaphore becomes non-zero.

パラメータ

wait: The number of milliseconds to wait for the semaphore. A value of -1 is infinite.

戻り値

成功した場合に true を、失敗した場合に false を返します。

例

例1 SyncSemaphore::lock() example

<?php
$semaphore = new SyncSemaphore("LimitedResource_2clients", 2);

if (!$semaphore->lock(3000))
{
    echo "Unable to lock semaphore.";

    exit();
}

/* ... */

$semaphore->unlock();
?>

参考

SyncSemaphore::unlock() - Increases the count of the semaphore

関連キーワード:

semaphore SyncSemaphore lock count Decreases waits unlock wait construct sync until becomes number milliseconds infinite 成功 example LimitedResource clients Unable exit 参考 Increases