Move CancellationFlag and WaitableEvent to the synchronization subdirectory.

TEST=it compiles
BUG=none
Review URL: http://codereview.chromium.org/5977010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@70369 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 165 insertions, 0 deletions

diff --git a/base/synchronization/waitable_event_watcher_unittest.cc b/base/synchronization/waitable_event_watcher_unittest.cc
new file mode 100644
index 0000000..1715dff
--- /dev/null
+++ b/base/synchronization/waitable_event_watcher_unittest.cc
@@ -0,0 +1,165 @@
+// Copyright (c) 2011 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/synchronization/waitable_event.h"
+#include "base/synchronization/waitable_event_watcher.h"
+#include "base/threading/platform_thread.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+
+namespace {
+
+class QuitDelegate : public WaitableEventWatcher::Delegate {
+ public:
+  virtual void OnWaitableEventSignaled(WaitableEvent* event) {
+    MessageLoop::current()->Quit();
+  }
+};
+
+class DecrementCountDelegate : public WaitableEventWatcher::Delegate {
+ public:
+  explicit DecrementCountDelegate(int* counter) : counter_(counter) {
+  }
+  virtual void OnWaitableEventSignaled(WaitableEvent* object) {
+    --(*counter_);
+  }
+ private:
+  int* counter_;
+};
+
+void RunTest_BasicSignal(MessageLoop::Type message_loop_type) {
+  MessageLoop message_loop(message_loop_type);
+
+  // A manual-reset event that is not yet signaled.
+  WaitableEvent event(true, false);
+
+  WaitableEventWatcher watcher;
+  EXPECT_TRUE(watcher.GetWatchedEvent() == NULL);
+
+  QuitDelegate delegate;
+  watcher.StartWatching(&event, &delegate);
+  EXPECT_EQ(&event, watcher.GetWatchedEvent());
+
+  event.Signal();
+
+  MessageLoop::current()->Run();
+
+  EXPECT_TRUE(watcher.GetWatchedEvent() == NULL);
+}
+
+void RunTest_BasicCancel(MessageLoop::Type message_loop_type) {
+  MessageLoop message_loop(message_loop_type);
+
+  // A manual-reset event that is not yet signaled.
+  WaitableEvent event(true, false);
+
+  WaitableEventWatcher watcher;
+
+  QuitDelegate delegate;
+  watcher.StartWatching(&event, &delegate);
+
+  watcher.StopWatching();
+}
+
+void RunTest_CancelAfterSet(MessageLoop::Type message_loop_type) {
+  MessageLoop message_loop(message_loop_type);
+
+  // A manual-reset event that is not yet signaled.
+  WaitableEvent event(true, false);
+
+  WaitableEventWatcher watcher;
+
+  int counter = 1;
+  DecrementCountDelegate delegate(&counter);
+
+  watcher.StartWatching(&event, &delegate);
+
+  event.Signal();
+
+  // Let the background thread do its business
+  base::PlatformThread::Sleep(30);
+
+  watcher.StopWatching();
+
+  MessageLoop::current()->RunAllPending();
+
+  // Our delegate should not have fired.
+  EXPECT_EQ(1, counter);
+}
+
+void RunTest_OutlivesMessageLoop(MessageLoop::Type message_loop_type) {
+  // Simulate a MessageLoop that dies before an WaitableEventWatcher.  This
+  // ordinarily doesn't happen when people use the Thread class, but it can
+  // happen when people use the Singleton pattern or atexit.
+  WaitableEvent event(true, false);
+  {
+    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);
+}
+
+#if defined(OS_WIN)
+// Crashes sometimes on vista.  http://crbug.com/62119
+#define MAYBE_DeleteUnder DISABLED_DeleteUnder
+#else
+#define MAYBE_DeleteUnder DeleteUnder
+#endif
+TEST(WaitableEventWatcherTest, MAYBE_DeleteUnder) {
+  RunTest_DeleteUnder(MessageLoop::TYPE_DEFAULT);
+  RunTest_DeleteUnder(MessageLoop::TYPE_IO);
+  RunTest_DeleteUnder(MessageLoop::TYPE_UI);
+}
+
+}  // namespace base