1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "cc/base/unique_notifier.h" 6 7 #include "base/bind.h" 8 #include "base/bind_helpers.h" 9 #include "base/location.h" 10 #include "base/sequenced_task_runner.h" 11 12 namespace cc { 13 UniqueNotifier(base::SequencedTaskRunner * task_runner,const base::Closure & closure)14UniqueNotifier::UniqueNotifier(base::SequencedTaskRunner* task_runner, 15 const base::Closure& closure) 16 : task_runner_(task_runner), 17 closure_(closure), 18 notification_pending_(false), 19 weak_ptr_factory_(this) { 20 } 21 ~UniqueNotifier()22UniqueNotifier::~UniqueNotifier() { 23 } 24 Schedule()25void UniqueNotifier::Schedule() { 26 if (notification_pending_) 27 return; 28 29 task_runner_->PostTask( 30 FROM_HERE, 31 base::Bind(&UniqueNotifier::Notify, weak_ptr_factory_.GetWeakPtr())); 32 notification_pending_ = true; 33 } 34 Notify()35void UniqueNotifier::Notify() { 36 // Note that the order here is important in case closure schedules another 37 // run. 38 notification_pending_ = false; 39 closure_.Run(); 40 } 41 42 } // namespace cc 43