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

includes/stream_wrappers.inc, line 439

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;
}

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