blob: e142d145761965b8c5f2cb2c97219cb871867910 [file] [log] [blame]
* Copyright 2011 The WebRTC project authors. All Rights Reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
#include <list>
#include "webrtc/api/mediastreaminterface.h"
#include "webrtc/rtc_base/checks.h"
namespace webrtc {
// Implements a template version of a notifier.
// TODO(deadbeef): This is an implementation detail; move out of api/.
template <class T>
class Notifier : public T {
Notifier() {
virtual void RegisterObserver(ObserverInterface* observer) {
RTC_DCHECK(observer != nullptr);
virtual void UnregisterObserver(ObserverInterface* observer) {
for (std::list<ObserverInterface*>::iterator it = observers_.begin();
it != observers_.end(); it++) {
if (*it == observer) {
void FireOnChanged() {
// Copy the list of observers to avoid a crash if the observer object
// unregisters as a result of the OnChanged() call. If the same list is used
// UnregisterObserver will affect the list make the iterator invalid.
std::list<ObserverInterface*> observers = observers_;
for (std::list<ObserverInterface*>::iterator it = observers.begin();
it != observers.end(); ++it) {
std::list<ObserverInterface*> observers_;
} // namespace webrtc