cc/base/unique_notifier.cc

   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
  14 UniqueNotifier::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
  22 UniqueNotifier::~UniqueNotifier() {
  23 }
  24
  25 void 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
  35 void 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