chromium/remoting/signaling/delegating_signal_strategy.h

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef REMOTING_SIGNALING_DELEGATING_SIGNAL_STRATEGY_H_
#define REMOTING_SIGNALING_DELEGATING_SIGNAL_STRATEGY_H_

#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "remoting/signaling/signal_strategy.h"
#include "remoting/signaling/signaling_address.h"

namespace base {
class SingleThreadTaskRunner;
}  // namespace base

namespace remoting {

// A signaling strategy class that delegates IQ sending and receiving.
//
// Notes on thread safety:
// 1. This object can be created on any thread.
// 2. |send_iq_callback| will always be called on the thread that it is created.
//    Note that |send_iq_callback| may be called after this object is destroyed.
// 3. The caller should invoke all methods on the SignalStrategy interface on
//    the |client_task_runner|.
// 4. All listeners will be called on |client_task_runner| as well.
// 5. The destructor should always be called on the |client_task_runner|.
// 6. As a result of (5), use MakeIncomingMessageCallback() to obtain a callback
//    when passing incoming signaling messages from the delegate.  The callback
//    can then be invoked at any thread.
class DelegatingSignalStrategy : public SignalStrategy { … };

}  // namespace remoting

#endif  // REMOTING_SIGNALING_DELEGATING_SIGNAL_STRATEGY_H_