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 12namespace cc { 13 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 22UniqueNotifier::~UniqueNotifier() { 23} 24 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 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