Applied patch #1657 epoll and kqueue wrappers for the select module

The patch adds wrappers for the Linux epoll syscalls and the BSD kqueue syscalls. Thanks to Thomas Herve and the Twisted people for their support and help.
TODO: Finish documentation documentation

1 files changed, 189 insertions, 0 deletions

diff --git a/Lib/test/test_epoll.py b/Lib/test/test_epoll.py
new file mode 100644
index 0000000000..f56d74f095
--- /dev/null
+++ b/Lib/test/test_epoll.py
@@ -0,0 +1,189 @@
+# Copyright (c) 2001-2006 Twisted Matrix Laboratories.
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+"""
+Tests for epoll wrapper.
+"""
+import os
+import socket
+import errno
+import time
+import select
+import tempfile
+import unittest
+
+from test import test_support
+if not hasattr(select, "epoll"):
+    raise test_support.TestSkipped("test works only on Linux 2.6")
+
+class TestEPoll(unittest.TestCase):
+
+    def setUp(self):
+        self.serverSocket = socket.socket()
+        self.serverSocket.bind(('127.0.0.1', 0))
+        self.serverSocket.listen(1)
+        self.connections = [self.serverSocket]
+
+
+    def tearDown(self):
+        for skt in self.connections:
+            skt.close()
+
+    def _connected_pair(self):
+        client = socket.socket()
+        client.setblocking(False)
+        try:
+            client.connect(('127.0.0.1', self.serverSocket.getsockname()[1]))
+        except socket.error, e:
+            self.assertEquals(e.args[0], errno.EINPROGRESS)
+        else:
+            raise AssertionError("Connect should have raised EINPROGRESS")
+        server, addr = self.serverSocket.accept()
+
+        self.connections.extend((client, server))
+        return client, server
+
+    def test_create(self):
+        try:
+            ep = select.epoll(16)
+        except OSError, e:
+            raise AssertionError(str(e))
+        self.assert_(ep.fileno() > 0, ep.fileno())
+        self.assert_(not ep.closed)
+        ep.close()
+        self.assert_(ep.closed)
+        self.assertRaises(ValueError, ep.fileno)
+
+    def test_badcreate(self):
+        self.assertRaises(TypeError, select.epoll, 1, 2, 3)
+        self.assertRaises(TypeError, select.epoll, 'foo')
+        self.assertRaises(TypeError, select.epoll, None)
+        self.assertRaises(TypeError, select.epoll, ())
+        self.assertRaises(TypeError, select.epoll, ['foo'])
+        self.assertRaises(TypeError, select.epoll, {})
+
+    def test_add(self):
+        server, client = self._connected_pair()
+
+        ep = select.epoll(2)
+        try:
+            ep.register(server.fileno(), select.EPOLLIN | select.EPOLLOUT)
+            ep.register(client.fileno(), select.EPOLLIN | select.EPOLLOUT)
+        finally:
+            ep.close()
+
+    def test_fromfd(self):
+        server, client = self._connected_pair()
+
+        ep = select.epoll(2)
+        ep2 = select.epoll.fromfd(ep.fileno())
+
+        ep2.register(server.fileno(), select.EPOLLIN | select.EPOLLOUT)
+        ep2.register(client.fileno(), select.EPOLLIN | select.EPOLLOUT)
+
+        events = ep.poll(1, 4)
+        events2 = ep2.poll(0.9, 4)
+        self.assertEqual(len(events), 2)
+        self.assertEqual(len(events2), 2)
+
+        ep.close()
+        try:
+            ep2.poll(1, 4)
+        except IOError, e:
+            self.failUnlessEqual(e.args[0], errno.EBADF, e)
+        else:
+            self.fail("epoll on closed fd didn't raise EBADF")
+
+    def test_control_and_wait(self):
+        client, server = self._connected_pair()
+
+        ep = select.epoll(16)
+        ep.register(server.fileno(),
+                   select.EPOLLIN | select.EPOLLOUT | select.EPOLLET)
+        ep.register(client.fileno(),
+                   select.EPOLLIN | select.EPOLLOUT | select.EPOLLET)
+
+        now = time.time()
+        events = ep.poll(1, 4)
+        then = time.time()
+        self.failIf(then - now > 0.1, then - now)
+
+        events.sort()
+        expected = [(client.fileno(), select.EPOLLOUT),
+                    (server.fileno(), select.EPOLLOUT)]
+        expected.sort()
+
+        self.assertEquals(events, expected)
+        self.failIf(then - now > 0.01, then - now)
+
+        now = time.time()
+        events = ep.poll(timeout=2.1, maxevents=4)
+        then = time.time()
+        self.failIf(events)
+
+        client.send("Hello!")
+        server.send("world!!!")
+
+        now = time.time()
+        events = ep.poll(1, 4)
+        then = time.time()
+        self.failIf(then - now > 0.01)
+
+        events.sort()
+        expected = [(client.fileno(), select.EPOLLIN | select.EPOLLOUT),
+                    (server.fileno(), select.EPOLLIN | select.EPOLLOUT)]
+        expected.sort()
+
+        self.assertEquals(events, expected)
+
+        ep.unregister(client.fileno())
+        ep.modify(server.fileno(), select.EPOLLOUT)
+        now = time.time()
+        events = ep.poll(1, 4)
+        then = time.time()
+        self.failIf(then - now > 0.01)
+
+        expected = [(server.fileno(), select.EPOLLOUT)]
+        self.assertEquals(events, expected)
+
+    def test_errors(self):
+        self.assertRaises(ValueError, select.epoll, -2)
+        self.assertRaises(ValueError, select.epoll().register, -1,
+                          select.EPOLLIN)
+
+    def test_unregister_closed(self):
+        server, client = self._connected_pair()
+        fd = server.fileno()
+        ep = select.epoll(16)
+        ep.register(server)
+
+        now = time.time()
+        events = ep.poll(1, 4)
+        then = time.time()
+        self.failIf(then - now > 0.01)
+
+        server.close()
+        ep.unregister(fd)
+
+def test_main():
+    test_support.run_unittest(TestEPoll)
+
+if __name__ == "__main__":
+    test_main()