5d6e58e76e
BUG=webrtc:4690 Support for rtc::scoped_ptr as return type. Support for up to 6 input parameters. R=pthatcher@webrtc.org, solenberg@webrtc.org Review URL: https://codereview.webrtc.org/1226153003 . Cr-Commit-Position: refs/heads/master@{#9569}
83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
/*
|
|
* Copyright 2004 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.
|
|
*/
|
|
|
|
#ifndef WEBRTC_BASE_MESSAGEHANDLER_H_
|
|
#define WEBRTC_BASE_MESSAGEHANDLER_H_
|
|
|
|
#include "webrtc/base/constructormagic.h"
|
|
#include "webrtc/base/scoped_ptr.h"
|
|
|
|
namespace rtc {
|
|
|
|
struct Message;
|
|
|
|
// Messages get dispatched to a MessageHandler
|
|
|
|
class MessageHandler {
|
|
public:
|
|
virtual ~MessageHandler();
|
|
virtual void OnMessage(Message* msg) = 0;
|
|
|
|
protected:
|
|
MessageHandler() {}
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(MessageHandler);
|
|
};
|
|
|
|
// Helper class to facilitate executing a functor on a thread.
|
|
template <class ReturnT, class FunctorT>
|
|
class FunctorMessageHandler : public MessageHandler {
|
|
public:
|
|
explicit FunctorMessageHandler(const FunctorT& functor)
|
|
: functor_(functor) {}
|
|
virtual void OnMessage(Message* msg) {
|
|
result_ = functor_();
|
|
}
|
|
const ReturnT& result() const { return result_; }
|
|
|
|
private:
|
|
FunctorT functor_;
|
|
ReturnT result_;
|
|
};
|
|
|
|
// Specialization for rtc::scoped_ptr<ReturnT>.
|
|
template <class ReturnT, class FunctorT>
|
|
class FunctorMessageHandler<class rtc::scoped_ptr<ReturnT>, FunctorT>
|
|
: public MessageHandler {
|
|
public:
|
|
explicit FunctorMessageHandler(const FunctorT& functor) : functor_(functor) {}
|
|
virtual void OnMessage(Message* msg) { result_ = functor_().Pass(); }
|
|
rtc::scoped_ptr<ReturnT> result() { return result_.Pass(); }
|
|
|
|
private:
|
|
FunctorT functor_;
|
|
rtc::scoped_ptr<ReturnT> result_;
|
|
};
|
|
|
|
// Specialization for ReturnT of void.
|
|
template <class FunctorT>
|
|
class FunctorMessageHandler<void, FunctorT> : public MessageHandler {
|
|
public:
|
|
explicit FunctorMessageHandler(const FunctorT& functor)
|
|
: functor_(functor) {}
|
|
virtual void OnMessage(Message* msg) {
|
|
functor_();
|
|
}
|
|
void result() const {}
|
|
|
|
private:
|
|
FunctorT functor_;
|
|
};
|
|
|
|
} // namespace rtc
|
|
|
|
#endif // WEBRTC_BASE_MESSAGEHANDLER_H_
|