/**
* @param string $path
* @param int $type self::LOCK_SHARED or self::LOCK_EXCLUSIVE
* @throws \OCP\Lock\LockedException
*/
public function acquireLock($path, $type)
{
if ($this->connection->inTransaction()) {
$this->logger->warning("Trying to acquire a lock for '{$path}' while inside a transition");
}
$this->connection->beginTransaction();
$this->initLockField($path);
if ($type === self::LOCK_SHARED) {
$result = $this->connection->executeUpdate('UPDATE `*PREFIX*file_locks` SET `lock` = `lock` + 1 WHERE `key` = ? AND `lock` >= 0', [$path]);
} else {
$result = $this->connection->executeUpdate('UPDATE `*PREFIX*file_locks` SET `lock` = -1 WHERE `key` = ? AND `lock` = 0', [$path]);
}
$this->connection->commit();
if ($result !== 1) {
throw new LockedException($path);
}
$this->markAcquire($path, $type);
}
/**
* Check if a transaction is active
*
* @return bool
*/
public function inTransaction()
{
return $this->connection->inTransaction();
}
