diff options
Diffstat (limited to 'phpBB/includes/functions_messenger.php')
| -rw-r--r-- | phpBB/includes/functions_messenger.php | 85 |
1 files changed, 18 insertions, 67 deletions
diff --git a/phpBB/includes/functions_messenger.php b/phpBB/includes/functions_messenger.php index cf03de08c4..a18aeddabd 100644 --- a/phpBB/includes/functions_messenger.php +++ b/phpBB/includes/functions_messenger.php @@ -651,64 +651,6 @@ class queue } /** - * Obtains exclusive lock on queue cache file. - * Returns resource representing the lock - */ - function lock() - { - // For systems that can't have two processes opening - // one file for writing simultaneously - if (file_exists($this->cache_file . '.lock')) - { - $mode = 'rb'; - } - else - { - $mode = 'wb'; - } - - $lock_fp = @fopen($this->cache_file . '.lock', $mode); - - if ($mode == 'wb') - { - if (!$lock_fp) - { - // Two processes may attempt to create lock file at the same time. - // Have the losing process try opening the lock file again for reading - // on the assumption that the winning process created it - $mode = 'rb'; - $lock_fp = @fopen($this->cache_file . '.lock', $mode); - } - else - { - // Only need to set mode when the lock file is written - @chmod($this->cache_file . '.lock', 0666); - } - } - - if ($lock_fp) - { - @flock($lock_fp, LOCK_EX); - } - - return $lock_fp; - } - - /** - * Releases lock on queue cache file, using resource obtained from lock() - */ - function unlock($lock_fp) - { - // lock() will return null if opening lock file, and thus locking, failed. - // Accept null values here so that client code does not need to check them - if ($lock_fp) - { - @flock($lock_fp, LOCK_UN); - fclose($lock_fp); - } - } - - /** * Process queue * Using lock file */ @@ -716,16 +658,24 @@ class queue { global $db, $config, $phpEx, $phpbb_root_path, $user; - $lock_fp = $this->lock(); + $lock = new phpbb_lock_flock($this->cache_file); + $lock->acquire(); - set_config('last_queue_run', time(), true); - - if (!file_exists($this->cache_file) || filemtime($this->cache_file) > time() - $config['queue_interval']) + // avoid races, check file existence once + $have_cache_file = file_exists($this->cache_file); + if (!$have_cache_file || $config['last_queue_run'] > time() - $config['queue_interval']) { - $this->unlock($lock_fp); + if (!$have_cache_file) + { + set_config('last_queue_run', time(), true); + } + + $lock->release(); return; } + set_config('last_queue_run', time(), true); + include($this->cache_file); foreach ($this->queue_data as $object => $data_ary) @@ -789,7 +739,7 @@ class queue break; default: - $this->unlock($lock_fp); + $lock->release(); return; } @@ -865,7 +815,7 @@ class queue } } - $this->unlock($lock_fp); + $lock->release(); } /** @@ -878,7 +828,8 @@ class queue return; } - $lock_fp = $this->lock(); + $lock = new phpbb_lock_flock($this->cache_file); + $lock->acquire(); if (file_exists($this->cache_file)) { @@ -905,7 +856,7 @@ class queue phpbb_chmod($this->cache_file, CHMOD_READ | CHMOD_WRITE); } - $this->unlock($lock_fp); + $lock->release(); } } |