ops

lib/tornado/platform/auto.py

@@ -0,0 +1,58 @@
+#
+# Copyright 2011 Facebook
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+"""Implementation of platform-specific functionality.
+
+For each function or class described in `tornado.platform.interface`,
+the appropriate platform-specific implementation exists in this module.
+Most code that needs access to this functionality should do e.g.::
+
+    from tornado.platform.auto import set_close_exec
+"""
+
+from __future__ import absolute_import, division, print_function
+
+import os
+
+if 'APPENGINE_RUNTIME' in os.environ:
+    from tornado.platform.common import Waker
+
+    def set_close_exec(fd):
+        pass
+elif os.name == 'nt':
+    from tornado.platform.common import Waker
+    from tornado.platform.windows import set_close_exec
+else:
+    from tornado.platform.posix import set_close_exec, Waker
+
+try:
+    # monotime monkey-patches the time module to have a monotonic function
+    # in versions of python before 3.3.
+    import monotime
+    # Silence pyflakes warning about this unused import
+    monotime
+except ImportError:
+    pass
+try:
+    # monotonic can provide a monotonic function in versions of python before
+    # 3.3, too.
+    from monotonic import monotonic as monotonic_time
+except ImportError:
+    try:
+        from time import monotonic as monotonic_time
+    except ImportError:
+        monotonic_time = None
+
+__all__ = ['Waker', 'set_close_exec', 'monotonic_time']