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Unified Diff: base/waitable_event_watcher_win.cc

Issue 16554: WaitableEvent (Closed)
Patch Set: Addresssing darin's comments (round 2) Created 11 years, 11 months ago
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Index: base/waitable_event_watcher_win.cc
diff --git a/base/waitable_event_watcher_win.cc b/base/waitable_event_watcher_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7619aa46ed8196ffb7a9ab1c2283832db13a3d96
--- /dev/null
+++ b/base/waitable_event_watcher_win.cc
@@ -0,0 +1,60 @@
+// 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/waitable_event_watcher.h"
+
+#include "base/compiler_specific.h"
+#include "base/object_watcher.h"
+#include "base/waitable_event.h"
+
+namespace base {
+
+WaitableEventWatcher::ObjectWatcherHelper::ObjectWatcherHelper(
+ WaitableEventWatcher* watcher)
+ : watcher_(watcher) {
+};
+
+void WaitableEventWatcher::ObjectWatcherHelper::OnObjectSignaled(HANDLE h) {
+ watcher_->OnObjectSignaled();
+}
+
+
+WaitableEventWatcher::WaitableEventWatcher()
+ : event_(NULL),
+ ALLOW_THIS_IN_INITIALIZER_LIST(helper_(this)),
+ delegate_(NULL) {
+}
+
+WaitableEventWatcher::~WaitableEventWatcher() {
+}
+
+bool WaitableEventWatcher::StartWatching(WaitableEvent* event,
+ Delegate* delegate) {
+ delegate_ = delegate;
+ event_ = event;
+
+ return watcher_.StartWatching(event->handle(), &helper_);
+}
+
+void WaitableEventWatcher::StopWatching() {
+ delegate_ = NULL;
+ event_ = NULL;
+ watcher_.StopWatching();
+}
+
+WaitableEvent* WaitableEventWatcher::GetWatchedEvent() {
+ return event_;
+}
+
+void WaitableEventWatcher::OnObjectSignaled() {
+ WaitableEvent* event = event_;
+ Delegate* delegate = delegate_;
+ event_ = NULL;
+ delegate_ = NULL;
+ DCHECK(event);
+
+ delegate->OnWaitableEventSignaled(event);
+}
+
+} // namespace base
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