public function LocalStream::stream_lock
public LocalStream::stream_lock($operation)
Support for flock().
Parameters
int $operation: One of the following:
- LOCK_SH to acquire a shared lock (reader).
- LOCK_EX to acquire an exclusive lock (writer).
- LOCK_UN to release a lock (shared or exclusive).
- LOCK_NB if you don't want flock() to block while locking (not supported on Windows).
Return value
bool Always returns TRUE at the present time.
Overrides PhpStreamWrapperInterface::stream_lock
See also
http://php.net/manual/streamwrapper.stream-lock.php
File
- core/lib/Drupal/Core/StreamWrapper/LocalStream.php, line 191
Class
- LocalStream
- Defines a Drupal stream wrapper base class for local files.
Namespace
Drupal\Core\StreamWrapperCode
public function stream_lock($operation) { if (in_array($operation, array(LOCK_SH, LOCK_EX, LOCK_UN, LOCK_NB))) { return flock($this->handle, $operation); } return TRUE; }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!StreamWrapper!LocalStream.php/function/LocalStream::stream_lock/8.1.x