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\StreamWrapper

Code

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;
}