media/audio/cross_process_notification.cc

   1 // Copyright (c) 2012 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 "media/audio/cross_process_notification.h"
   6
   7 #include "base/logging.h"
   8 #include "base/memory/scoped_ptr.h"
   9
  10 CrossProcessNotification::CrossProcessNotification() {}
  11
  12 CrossProcessNotification::WaitForMultiple::WaitForMultiple(
  13     const Notifications* notifications) {
  14   Reset(notifications);
  15 }
  16
  17 int CrossProcessNotification::WaitForMultiple::Wait() {
  18   DCHECK(CalledOnValidThread());
  19   int ret = WaitMultiple(*notifications_, wait_offset_);
  20   wait_offset_ = (ret + 1) % notifications_->size();
  21   return ret;
  22 }
  23
  24 void CrossProcessNotification::WaitForMultiple::Reset(
  25     const Notifications* notifications) {
  26   DCHECK(CalledOnValidThread());
  27   wait_offset_ = 0;
  28   notifications_ = notifications;
  29   DCHECK(!notifications_->empty());
  30 }