1 files changed, 49 insertions, 0 deletions
diff --git a/daemon/pidfile.py b/daemon/pidfile.py
new file mode 100644
index 0000000..3248aca
--- /dev/null
+++ b/daemon/pidfile.py
@@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+
+# daemon/pidfile.py
+# Part of ‘python-daemon’, an implementation of PEP 3143.
+#
+# Copyright © 2008–2014 Ben Finney <ben+python@benfinney.id.au>
+#
+# This is free software: you may copy, modify, and/or distribute this work
+# under the terms of the Apache License, version 2.0 as published by the
+# Apache Software Foundation.
+# No warranty expressed or implied. See the file LICENSE.ASF-2 for details.
+
+""" Lockfile behaviour implemented via Unix PID files.
+    """
+
+from __future__ import (absolute_import, unicode_literals)
+
+from lockfile.pidlockfile import PIDLockFile
+
+
+class TimeoutPIDLockFile(PIDLockFile, object):
+    """ Lockfile with default timeout, implemented as a Unix PID file.
+
+        This uses the ``PIDLockFile`` implementation, with the
+        following changes:
+
+        * The `acquire_timeout` parameter to the initialiser will be
+          used as the default `timeout` parameter for the `acquire`
+          method.
+
+        """
+
+    def __init__(self, path, acquire_timeout=None, *args, **kwargs):
+        """ Set up the parameters of a TimeoutPIDLockFile. """
+        self.acquire_timeout = acquire_timeout
+        super(TimeoutPIDLockFile, self).__init__(path, *args, **kwargs)
+
+    def acquire(self, timeout=None, *args, **kwargs):
+        """ Acquire the lock. """
+        if timeout is None:
+            timeout = self.acquire_timeout
+        super(TimeoutPIDLockFile, self).acquire(timeout, *args, **kwargs)
+
+
+# Local variables:
+# coding: utf-8
+# mode: python
+# End:
+# vim: fileencoding=utf-8 filetype=python :