add kikimr_configure

1 files changed, 70 insertions, 0 deletions

diff --git a/contrib/python/Twisted/py3/twisted/_threads/_memory.py b/contrib/python/Twisted/py3/twisted/_threads/_memory.py
new file mode 100644
index 0000000000..4c56db02ae
--- /dev/null
+++ b/contrib/python/Twisted/py3/twisted/_threads/_memory.py
@@ -0,0 +1,70 @@
+# -*- test-case-name: twisted._threads.test.test_memory -*-
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Implementation of an in-memory worker that defers execution.
+"""
+
+
+from zope.interface import implementer
+
+from . import IWorker
+from ._convenience import Quit
+
+NoMoreWork = object()
+
+
+@implementer(IWorker)
+class MemoryWorker:
+    """
+    An L{IWorker} that queues work for later performance.
+
+    @ivar _quit: a flag indicating
+    @type _quit: L{Quit}
+    """
+
+    def __init__(self, pending=list):
+        """
+        Create a L{MemoryWorker}.
+        """
+        self._quit = Quit()
+        self._pending = pending()
+
+    def do(self, work):
+        """
+        Queue some work for to perform later; see L{createMemoryWorker}.
+
+        @param work: The work to perform.
+        """
+        self._quit.check()
+        self._pending.append(work)
+
+    def quit(self):
+        """
+        Quit this worker.
+        """
+        self._quit.set()
+        self._pending.append(NoMoreWork)
+
+
+def createMemoryWorker():
+    """
+    Create an L{IWorker} that does nothing but defer work, to be performed
+    later.
+
+    @return: a worker that will enqueue work to perform later, and a callable
+        that will perform one element of that work.
+    @rtype: 2-L{tuple} of (L{IWorker}, L{callable})
+    """
+
+    def perform():
+        if not worker._pending:
+            return False
+        if worker._pending[0] is NoMoreWork:
+            return False
+        worker._pending.pop(0)()
+        return True
+
+    worker = MemoryWorker()
+    return (worker, perform)