(PECL sync >= 1.0.0)
SyncReaderWriter::readlock — Waits for a read lock
Obtains a read lock on a SyncReaderWriter object.
The 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.
Example #1 SyncReaderWriter::readlock() example
$readwrite = new SyncReaderWriter("FileCacheLock");
/* ... */