15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2011 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/synchronization/waitable_event_watcher.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/compiler_specific.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/synchronization/waitable_event.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/win/object_watcher.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)WaitableEventWatcher::WaitableEventWatcher() 142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : event_(NULL) { 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)WaitableEventWatcher::~WaitableEventWatcher() { 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)bool WaitableEventWatcher::StartWatching( 212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) WaitableEvent* event, 222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const EventCallback& callback) { 232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) callback_ = callback; 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) event_ = event; 252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return watcher_.StartWatching(event->handle(), this); 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void WaitableEventWatcher::StopWatching() { 292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) callback_.Reset(); 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) event_ = NULL; 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) watcher_.StopWatching(); 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)WaitableEvent* WaitableEventWatcher::GetWatchedEvent() { 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return event_; 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void WaitableEventWatcher::OnObjectSignaled(HANDLE h) { 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WaitableEvent* event = event_; 402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) EventCallback callback = callback_; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) event_ = NULL; 422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) callback_.Reset(); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(event); 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) callback.Run(event); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 49