Swoole\Lock->trylock_read

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  3. Lock
  4. Swoole\Lock->trylock_read

Notice: the documentation is suitable for PHP extension swoole until v4.7.1, we only support PHP extension openswoole from v4.7.1

Declaration

<?php
Swoole\Lock->trylock ()

Parameters

Return

Description

Try to acquire the read only lock and return straight away if the lock is not available.

Example

<?php

$lock = new Swoole\Lock(SWOOLE_MUTEX);
echo "[Master] Create lock\n";
$lock->lock();
if (pcntl_fork() > 0)
{
    sleep(1);
    $lock->unlock();
} 
else
{
    echo "[Child] Wait Lock\n";
    $lock->lock();
    echo "[Child] Get Lock\n";
    $lock->unlock();
    exit("[Child] exit\n");
}
echo "[Master]release lock\n";
unset($lock);
sleep(1);
echo "[Master]exit\n";