add kikimr_configure

1 files changed, 56 insertions, 0 deletions

diff --git a/contrib/python/Twisted/py2/twisted/internet/default.py b/contrib/python/Twisted/py2/twisted/internet/default.py
new file mode 100644
index 0000000000..c78fb18520
--- /dev/null
+++ b/contrib/python/Twisted/py2/twisted/internet/default.py
@@ -0,0 +1,56 @@
+# -*- test-case-name: twisted.internet.test.test_default -*-
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+The most suitable default reactor for the current platform.
+
+Depending on a specific application's needs, some other reactor may in
+fact be better.
+"""
+
+from __future__ import division, absolute_import
+
+__all__ = ["install"]
+
+from twisted.python.runtime import platform
+
+
+def _getInstallFunction(platform):
+    """
+    Return a function to install the reactor most suited for the given platform.
+
+    @param platform: The platform for which to select a reactor.
+    @type platform: L{twisted.python.runtime.Platform}
+
+    @return: A zero-argument callable which will install the selected
+        reactor.
+    """
+    # Linux: epoll(7) is the default, since it scales well.
+    #
+    # macOS: poll(2) is not exposed by Python because it doesn't support all
+    # file descriptors (in particular, lack of PTY support is a problem) --
+    # see <http://bugs.python.org/issue5154>. kqueue has the same restrictions
+    # as poll(2) as far PTY support goes.
+    #
+    # Windows: IOCP should eventually be default, but still has some serious
+    # bugs, e.g. <http://twistedmatrix.com/trac/ticket/4667>.
+    #
+    # We therefore choose epoll(7) on Linux, poll(2) on other non-macOS POSIX
+    # platforms, and select(2) everywhere else.
+    try:
+        if platform.isLinux():
+            try:
+                from twisted.internet.epollreactor import install
+            except ImportError:
+                from twisted.internet.pollreactor import install
+        elif platform.getType() == 'posix' and not platform.isMacOSX():
+            from twisted.internet.pollreactor import install
+        else:
+            from twisted.internet.selectreactor import install
+    except ImportError:
+        from twisted.internet.selectreactor import install
+    return install
+
+
+install = _getInstallFunction(platform)