Support for flock().

Parameters

$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

Always returns TRUE at the present time.

Overrides StreamWrapperInterface::stream_lock

See also

http://php.net/manual/streamwrapper.stream-lock.php

File

drupal-7.x/includes/stream_wrappers.inc, line 434

Drupal stream wrapper interface.

Class

DrupalLocalStreamWrapper

Drupal stream wrapper base class for local files.

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;
}