SyncReaderWriter::__construct
(PECL sync >= 1.0.0)
SyncReaderWriter::__construct — Constructs a new SyncReaderWriter object
説明
Constructs a named or unnamed reader-writer object.
パラメータ
name-
The name of the reader-writer if this is a named reader-writer object.
注意:
If the name already exists, it must be able to be opened by the current user that the process is running as or an exception will be thrown with a meaningless error message.
注意: On Windows,
namemust not contain backslashes. autounlock-
Specifies whether or not to automatically unlock the reader-writer at the conclusion of the PHP script.
警告If an object is: A named reader-writer with an autounlock of FALSE, the object is locked for either reading or writing, and the PHP script concludes before the object is unlocked, then the underlying objects will end up in an inconsistent state.
戻り値
The new SyncReaderWriter object.
エラー / 例外
An exception is thrown if the reader-writer cannot be created or opened.
例
例1 SyncReaderWriter::__construct() example
<?php
$readwrite = new SyncReaderWriter("FileCacheLock");
$readwrite->readlock();
/* ... */
$readwrite->readunlock();
$readwrite->writelock();
/* ... */
$readwrite->writeunlock();
?>参考
- SyncReaderWriter::readlock() - Waits for a read lock
- SyncReaderWriter::readunlock() - Releases a read lock
- SyncReaderWriter::writelock() - Waits for an exclusive write lock
- SyncReaderWriter::writeunlock() - Releases a write lock
User Contributed Notes
