Search moodle.org's
Developer Documentation
Developer Documentation
- Bug fixes for general core bugs in 3.10.x will end 8 November 2021 (12 months).
- Bug fixes for security issues in 3.10.x will end 9 May 2022 (18 months).
- PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
/lib/classes/lock/ -> file_lock_factory.php (source)
Differences Between: [Versions 310 and 401] [Versions 310 and 402] [Versions 310 and 403] [Versions 39 and 310]
Flock based file locking factory. The file lock factory returns file locks locked with the flock function. Works OK, except on some NFS, exotic shared storage and exotic server OSes (like windows). On windows, a second attempt to get a lock will block indefinitely instead of timing out.
| Copyright: | Damyon Wiese 2013 |
| License: | http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
| File Size: | 208 lines (7 kb) |
| Included or required: | 0 times |
| Referenced: | 0 times |
| Includes or requires: | 0 files |
Defines 1 class
file_lock_factory:: (9 methods):
__construct()
supports_timeout()
supports_auto_release()
is_available()
supports_recursion()
get_debug_info()
get_lock()
release_lock()
extend_lock()
Class: file_lock_factory - X-Ref
Flock based file locking factory.The file lock factory returns file locks locked with the flock function. Works OK, except on some
NFS, exotic shared storage and exotic server OSes (like windows). On windows, a second attempt to get a
lock will block indefinitely instead of timing out.
| __construct($type) X-Ref |
| Create this lock factory. param: string $type - The type, e.g. cron, cache, session |
| supports_timeout() X-Ref |
| Return information about the blocking behaviour of the lock type on this platform. return: boolean - False if attempting to get a lock will block indefinitely. |
| supports_auto_release() X-Ref |
| This lock type will be automatically released when a process ends. return: boolean - True |
| is_available() X-Ref |
| Is available. return: boolean - True if preventfilelocking is not set - or the file_lock_root is not in dataroot. |
| supports_recursion() X-Ref |
| Multiple locks for the same resource cannot be held from a single process. return: boolean - False |
| get_debug_info() X-Ref |
| Get some info that might be useful for debugging. return: boolean - string |
| get_lock($resource, $timeout, $maxlifetime = 86400) X-Ref |
| Get a lock within the specified timeout or return false. param: string $resource - The identifier for the lock. Should use frankenstyle prefix. param: int $timeout - The number of seconds to wait for a lock before giving up. param: int $maxlifetime - Unused by this lock type. return: boolean - true if a lock was obtained. |
| release_lock(lock $lock) X-Ref |
| Release a lock that was previously obtained with @lock. param: lock $lock - A lock obtained from this factory. return: boolean - true if the lock is no longer held (including if it was never held). |
| extend_lock(lock $lock, $maxlifetime = 86400) X-Ref |
| Extend a lock that was previously obtained with @lock. param: lock $lock - not used param: int $maxlifetime - not used return: boolean - true if the lock was extended. |
