5f93d0a140
BUG=2133 R=juberti@webrtc.org Review URL: https://webrtc-codereview.appspot.com/39559004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@8105 4adac7df-926f-26a2-2b94-8c16560cd09d
78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
/*
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* libjingle
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* Copyright 2011 Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_APP_WEBRTC_NOTIFIER_H_
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#define TALK_APP_WEBRTC_NOTIFIER_H_
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#include <list>
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#include "talk/app/webrtc/mediastreaminterface.h"
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#include "webrtc/base/common.h"
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namespace webrtc {
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// Implement a template version of a notifier.
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template <class T>
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class Notifier : public T {
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public:
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Notifier() {
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}
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virtual void RegisterObserver(ObserverInterface* observer) {
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ASSERT(observer != NULL);
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observers_.push_back(observer);
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}
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virtual void UnregisterObserver(ObserverInterface* observer) {
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for (std::list<ObserverInterface*>::iterator it = observers_.begin();
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it != observers_.end(); it++) {
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if (*it == observer) {
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observers_.erase(it);
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break;
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}
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}
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}
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void FireOnChanged() {
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// Copy the list of observers to avoid a crash if the observer object
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// unregisters as a result of the OnChanged() call. If the same list is used
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// UnregisterObserver will affect the list make the iterator invalid.
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std::list<ObserverInterface*> observers = observers_;
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for (std::list<ObserverInterface*>::iterator it = observers.begin();
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it != observers.end(); ++it) {
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(*it)->OnChanged();
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}
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}
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protected:
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std::list<ObserverInterface*> observers_;
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};
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} // namespace webrtc
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#endif // TALK_APP_WEBRTC_NOTIFIER_H_
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