NullLockManager.php
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NullLockManager.php
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	<?php
	/**
	* @license GPL-2.0-or-later
	* @file
	*/

	/**
	* Simple lock management based on in-process reference counting.
	*
	* @since 1.19
	* @ingroup LockManager
	*/
	class NullLockManager extends LockManager {
	/** @inheritDoc */
	protected function doLock( array $paths, $type ) {
	foreach ( $paths as $path ) {
	if ( isset( $this->locksHeld[$path][$type] ) ) {
	++$this->locksHeld[$path][$type];
	} else {
	$this->locksHeld[$path][$type] = 1;
	}
	}

	return StatusValue::newGood();
	}

	/** @inheritDoc */
	protected function doUnlock( array $paths, $type ) {
	$status = StatusValue::newGood();

	foreach ( $paths as $path ) {
	if ( isset( $this->locksHeld[$path][$type] ) ) {
	if ( --$this->locksHeld[$path][$type] <= 0 ) {
	unset( $this->locksHeld[$path][$type] );
	if ( !$this->locksHeld[$path] ) {
	unset( $this->locksHeld[$path] ); // clean up
	}
	}
	} else {
	$status->warning( 'lockmanager-notlocked', $path );
	}
	}

	return $status;
	}
	}