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// 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/synchronization/waitable_event_watcher.h"
#include "base/compiler_specific.h"
#include "base/synchronization/waitable_event.h"
#include "base/win/object_watcher.h"
namespace base {
WaitableEventWatcher::WaitableEventWatcher()
: event_(NULL) {
}
WaitableEventWatcher::~WaitableEventWatcher() {
}
bool WaitableEventWatcher::StartWatching(
WaitableEvent* event,
const EventCallback& callback) {
callback_ = callback;
event_ = event;
return watcher_.StartWatching(event->handle(), this);
}
void WaitableEventWatcher::StopWatching() {
callback_.Reset();
event_ = NULL;
watcher_.StopWatching();
}
WaitableEvent* WaitableEventWatcher::GetWatchedEvent() {
return event_;
}
void WaitableEventWatcher::OnObjectSignaled(HANDLE h) {
WaitableEvent* event = event_;
EventCallback callback = callback_;
event_ = NULL;
callback_.Reset();
DCHECK(event);
callback.Run(event);
}
} // namespace base
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