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    SyncReaderWriter::readlock

    (PECL sync >= 1.0.0)

    SyncReaderWriter::readlock — Waits for a read lock

    说明

    public SyncReaderWriter::readlock(int $wait = -1): bool

    Obtains a read lock on a SyncReaderWriter object.

    参数

    wait

    The number of milliseconds to wait for a lock. A value of -1 is infinite.

    返回值

    成功时返回 true， 或者在失败时返回 false。

    示例

    示例 #1 SyncReaderWriter::readlock() example

    <?php
    $readwrite     = new SyncReaderWriter("FileCacheLock");
    $readwrite->readlock();
    /* ... */
    $readwrite->readunlock();
    ?>

    参见

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