(PECL sync >= 1.0.0)
SyncReaderWriter::readlock — Waits for a read lock
$wait = -1
] ) : boolObtains a read lock on a SyncReaderWriter object.
waitThe number of milliseconds to wait for a lock. A value of -1 is infinite.
A boolean of TRUE if the lock was obtained, FALSE otherwise.
例1 SyncReaderWriter::readlock() example
<?php
$readwrite = new SyncReaderWriter("FileCacheLock");
$readwrite->readlock();
/* ... */
$readwrite->readunlock();
?>