POSIX: allow WaitableEvents to be deleted while watching them.

base/waitable_event_watcher_unittest.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/message_loop.h"
 #include "base/platform_thread.h"
 #include "base/waitable_event.h"
 #include "base/waitable_event_watcher.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 89 matching lines @@
     WaitableEventWatcher watcher;
     {
       MessageLoop message_loop(message_loop_type);
 
       QuitDelegate delegate;
       watcher.StartWatching(&event, &delegate);
     }
   }
 }
 
+void RunTest_DeleteUnder(MessageLoop::Type message_loop_type) {
+  // Delete the WaitableEvent out from under the Watcher. This is explictly
+  // allowed by the interface.
+
+  MessageLoop message_loop(message_loop_type);
+
+  {
+    WaitableEventWatcher watcher;
+
+    WaitableEvent* event = new WaitableEvent(false, false);
+    QuitDelegate delegate;
+    watcher.StartWatching(event, &delegate);
+    delete event;
+  }
+}
+
 }  // namespace
 
 //-----------------------------------------------------------------------------
 
 TEST(WaitableEventWatcherTest, BasicSignal) {
   RunTest_BasicSignal(MessageLoop::TYPE_DEFAULT);
   RunTest_BasicSignal(MessageLoop::TYPE_IO);
   RunTest_BasicSignal(MessageLoop::TYPE_UI);
 }
 
 TEST(WaitableEventWatcherTest, BasicCancel) {
   RunTest_BasicCancel(MessageLoop::TYPE_DEFAULT);
   RunTest_BasicCancel(MessageLoop::TYPE_IO);
   RunTest_BasicCancel(MessageLoop::TYPE_UI);
 }
 
 TEST(WaitableEventWatcherTest, CancelAfterSet) {
   RunTest_CancelAfterSet(MessageLoop::TYPE_DEFAULT);
   RunTest_CancelAfterSet(MessageLoop::TYPE_IO);
   RunTest_CancelAfterSet(MessageLoop::TYPE_UI);
 }
 
 TEST(WaitableEventWatcherTest, OutlivesMessageLoop) {
   RunTest_OutlivesMessageLoop(MessageLoop::TYPE_DEFAULT);
   RunTest_OutlivesMessageLoop(MessageLoop::TYPE_IO);
   RunTest_OutlivesMessageLoop(MessageLoop::TYPE_UI);
 }
+
+TEST(WaitableEventWatcherTest, DeleteUnder) {
+  RunTest_DeleteUnder(MessageLoop::TYPE_DEFAULT);
+  RunTest_DeleteUnder(MessageLoop::TYPE_IO);
+  RunTest_DeleteUnder(MessageLoop::TYPE_UI);
+}