449 lines
16 KiB
C
449 lines
16 KiB
C
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/*
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* Copyright 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// This file contains Macros for creating proxies for webrtc MediaStream and
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// PeerConnection classes.
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//
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// Example usage:
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//
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// class TestInterface : public rtc::RefCountInterface {
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// public:
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// std::string FooA() = 0;
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// std::string FooB(bool arg1) const = 0;
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// std::string FooC(bool arg1) = 0;
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// };
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//
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// Note that return types can not be a const reference.
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//
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// class Test : public TestInterface {
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// ... implementation of the interface.
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// };
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//
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// BEGIN_PROXY_MAP(Test)
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// PROXY_METHOD0(std::string, FooA)
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// PROXY_CONSTMETHOD1(std::string, FooB, arg1)
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// PROXY_WORKER_METHOD1(std::string, FooC, arg1)
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// END_PROXY()
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//
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// where the first two methods are invoked on the signaling thread,
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// and the third is invoked on the worker thread.
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//
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// The proxy can be created using
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//
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// TestProxy::Create(Thread* signaling_thread, Thread* worker_thread,
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// TestInterface*).
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//
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// The variant defined with BEGIN_SIGNALING_PROXY_MAP is unaware of
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// the worker thread, and invokes all methods on the signaling thread.
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#ifndef WEBRTC_API_PROXY_H_
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#define WEBRTC_API_PROXY_H_
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#include <memory>
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#include "webrtc/base/event.h"
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#include "webrtc/base/thread.h"
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namespace webrtc {
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template <typename R>
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class ReturnType {
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public:
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template<typename C, typename M>
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void Invoke(C* c, M m) { r_ = (c->*m)(); }
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template<typename C, typename M, typename T1>
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void Invoke(C* c, M m, T1 a1) { r_ = (c->*m)(a1); }
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template<typename C, typename M, typename T1, typename T2>
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void Invoke(C* c, M m, T1 a1, T2 a2) { r_ = (c->*m)(a1, a2); }
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template<typename C, typename M, typename T1, typename T2, typename T3>
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void Invoke(C* c, M m, T1 a1, T2 a2, T3 a3) { r_ = (c->*m)(a1, a2, a3); }
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template<typename C, typename M, typename T1, typename T2, typename T3,
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typename T4>
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void Invoke(C* c, M m, T1 a1, T2 a2, T3 a3, T4 a4) {
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r_ = (c->*m)(a1, a2, a3, a4);
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}
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template<typename C, typename M, typename T1, typename T2, typename T3,
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typename T4, typename T5>
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void Invoke(C* c, M m, T1 a1, T2 a2, T3 a3, T4 a4, T5 a5) {
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r_ = (c->*m)(a1, a2, a3, a4, a5);
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}
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R value() { return r_; }
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private:
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R r_;
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};
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template <>
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class ReturnType<void> {
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public:
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template<typename C, typename M>
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void Invoke(C* c, M m) { (c->*m)(); }
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template<typename C, typename M, typename T1>
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void Invoke(C* c, M m, T1 a1) { (c->*m)(a1); }
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template<typename C, typename M, typename T1, typename T2>
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void Invoke(C* c, M m, T1 a1, T2 a2) { (c->*m)(a1, a2); }
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template<typename C, typename M, typename T1, typename T2, typename T3>
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void Invoke(C* c, M m, T1 a1, T2 a2, T3 a3) { (c->*m)(a1, a2, a3); }
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void value() {}
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};
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namespace internal {
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class SynchronousMethodCall
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: public rtc::MessageData,
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public rtc::MessageHandler {
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public:
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explicit SynchronousMethodCall(rtc::MessageHandler* proxy)
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: e_(), proxy_(proxy) {}
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~SynchronousMethodCall() {}
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void Invoke(const rtc::Location& posted_from, rtc::Thread* t) {
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if (t->IsCurrent()) {
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proxy_->OnMessage(NULL);
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} else {
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e_.reset(new rtc::Event(false, false));
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t->Post(posted_from, this, 0);
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e_->Wait(rtc::Event::kForever);
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}
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}
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private:
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void OnMessage(rtc::Message*) { proxy_->OnMessage(NULL); e_->Set(); }
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std::unique_ptr<rtc::Event> e_;
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rtc::MessageHandler* proxy_;
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};
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} // namespace internal
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template <typename C, typename R>
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class MethodCall0 : public rtc::Message,
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public rtc::MessageHandler {
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public:
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typedef R (C::*Method)();
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MethodCall0(C* c, Method m) : c_(c), m_(m) {}
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R Marshal(const rtc::Location& posted_from, rtc::Thread* t) {
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internal::SynchronousMethodCall(this).Invoke(posted_from, t);
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return r_.value();
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}
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private:
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void OnMessage(rtc::Message*) { r_.Invoke(c_, m_); }
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C* c_;
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Method m_;
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ReturnType<R> r_;
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};
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template <typename C, typename R>
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class ConstMethodCall0 : public rtc::Message,
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public rtc::MessageHandler {
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public:
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typedef R (C::*Method)() const;
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ConstMethodCall0(C* c, Method m) : c_(c), m_(m) {}
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R Marshal(const rtc::Location& posted_from, rtc::Thread* t) {
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internal::SynchronousMethodCall(this).Invoke(posted_from, t);
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return r_.value();
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}
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private:
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void OnMessage(rtc::Message*) { r_.Invoke(c_, m_); }
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C* c_;
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Method m_;
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ReturnType<R> r_;
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};
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template <typename C, typename R, typename T1>
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class MethodCall1 : public rtc::Message,
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public rtc::MessageHandler {
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public:
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typedef R (C::*Method)(T1 a1);
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MethodCall1(C* c, Method m, T1 a1) : c_(c), m_(m), a1_(a1) {}
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R Marshal(const rtc::Location& posted_from, rtc::Thread* t) {
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internal::SynchronousMethodCall(this).Invoke(posted_from, t);
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return r_.value();
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}
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private:
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void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_); }
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C* c_;
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Method m_;
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ReturnType<R> r_;
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T1 a1_;
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};
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template <typename C, typename R, typename T1>
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class ConstMethodCall1 : public rtc::Message,
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public rtc::MessageHandler {
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public:
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typedef R (C::*Method)(T1 a1) const;
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ConstMethodCall1(C* c, Method m, T1 a1) : c_(c), m_(m), a1_(a1) {}
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R Marshal(const rtc::Location& posted_from, rtc::Thread* t) {
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internal::SynchronousMethodCall(this).Invoke(posted_from, t);
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return r_.value();
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}
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private:
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void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_); }
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C* c_;
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Method m_;
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ReturnType<R> r_;
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T1 a1_;
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};
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template <typename C, typename R, typename T1, typename T2>
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class MethodCall2 : public rtc::Message,
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public rtc::MessageHandler {
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public:
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typedef R (C::*Method)(T1 a1, T2 a2);
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MethodCall2(C* c, Method m, T1 a1, T2 a2) : c_(c), m_(m), a1_(a1), a2_(a2) {}
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R Marshal(const rtc::Location& posted_from, rtc::Thread* t) {
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internal::SynchronousMethodCall(this).Invoke(posted_from, t);
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return r_.value();
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}
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private:
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void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_, a2_); }
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C* c_;
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Method m_;
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ReturnType<R> r_;
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T1 a1_;
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T2 a2_;
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};
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template <typename C, typename R, typename T1, typename T2, typename T3>
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class MethodCall3 : public rtc::Message,
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public rtc::MessageHandler {
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public:
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typedef R (C::*Method)(T1 a1, T2 a2, T3 a3);
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MethodCall3(C* c, Method m, T1 a1, T2 a2, T3 a3)
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: c_(c), m_(m), a1_(a1), a2_(a2), a3_(a3) {}
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R Marshal(const rtc::Location& posted_from, rtc::Thread* t) {
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internal::SynchronousMethodCall(this).Invoke(posted_from, t);
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return r_.value();
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}
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private:
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void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_, a2_, a3_); }
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C* c_;
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Method m_;
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ReturnType<R> r_;
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T1 a1_;
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T2 a2_;
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T3 a3_;
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};
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template <typename C, typename R, typename T1, typename T2, typename T3,
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typename T4>
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class MethodCall4 : public rtc::Message,
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public rtc::MessageHandler {
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public:
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typedef R (C::*Method)(T1 a1, T2 a2, T3 a3, T4 a4);
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MethodCall4(C* c, Method m, T1 a1, T2 a2, T3 a3, T4 a4)
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: c_(c), m_(m), a1_(a1), a2_(a2), a3_(a3), a4_(a4) {}
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R Marshal(const rtc::Location& posted_from, rtc::Thread* t) {
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internal::SynchronousMethodCall(this).Invoke(posted_from, t);
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return r_.value();
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}
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private:
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void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_, a2_, a3_, a4_); }
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C* c_;
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Method m_;
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ReturnType<R> r_;
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T1 a1_;
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T2 a2_;
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T3 a3_;
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T4 a4_;
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};
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template <typename C, typename R, typename T1, typename T2, typename T3,
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typename T4, typename T5>
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class MethodCall5 : public rtc::Message,
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public rtc::MessageHandler {
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public:
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typedef R (C::*Method)(T1 a1, T2 a2, T3 a3, T4 a4, T5 a5);
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MethodCall5(C* c, Method m, T1 a1, T2 a2, T3 a3, T4 a4, T5 a5)
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: c_(c), m_(m), a1_(a1), a2_(a2), a3_(a3), a4_(a4), a5_(a5) {}
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R Marshal(const rtc::Location& posted_from, rtc::Thread* t) {
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internal::SynchronousMethodCall(this).Invoke(posted_from, t);
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return r_.value();
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}
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private:
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void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_, a2_, a3_, a4_, a5_); }
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C* c_;
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Method m_;
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ReturnType<R> r_;
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T1 a1_;
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T2 a2_;
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T3 a3_;
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T4 a4_;
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T5 a5_;
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};
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#define BEGIN_SIGNALING_PROXY_MAP(c) \
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template <class INTERNAL_CLASS> \
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class c##ProxyWithInternal; \
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typedef c##ProxyWithInternal<c##Interface> c##Proxy; \
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template <class INTERNAL_CLASS> \
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class c##ProxyWithInternal : public c##Interface { \
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protected: \
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typedef c##Interface C; \
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c##ProxyWithInternal(rtc::Thread* signaling_thread, INTERNAL_CLASS* c) \
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: signaling_thread_(signaling_thread), c_(c) {} \
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~c##ProxyWithInternal() { \
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MethodCall0<c##ProxyWithInternal, void> call( \
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this, &c##ProxyWithInternal::Release_s); \
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call.Marshal(RTC_FROM_HERE, signaling_thread_); \
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} \
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\
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public: \
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static rtc::scoped_refptr<c##ProxyWithInternal> Create( \
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rtc::Thread* signaling_thread, \
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INTERNAL_CLASS* c) { \
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return new rtc::RefCountedObject<c##ProxyWithInternal>(signaling_thread, \
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c); \
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} \
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const INTERNAL_CLASS* internal() const { return c_.get(); } \
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INTERNAL_CLASS* internal() { return c_.get(); }
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#define BEGIN_PROXY_MAP(c) \
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template <class INTERNAL_CLASS> \
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class c##ProxyWithInternal; \
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typedef c##ProxyWithInternal<c##Interface> c##Proxy; \
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template <class INTERNAL_CLASS> \
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class c##ProxyWithInternal : public c##Interface { \
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protected: \
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typedef c##Interface C; \
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c##ProxyWithInternal(rtc::Thread* signaling_thread, \
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rtc::Thread* worker_thread, \
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INTERNAL_CLASS* c) \
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: signaling_thread_(signaling_thread), \
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worker_thread_(worker_thread), \
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c_(c) {} \
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~c##ProxyWithInternal() { \
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MethodCall0<c##ProxyWithInternal, void> call( \
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this, &c##ProxyWithInternal::Release_s); \
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call.Marshal(RTC_FROM_HERE, signaling_thread_); \
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} \
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\
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public: \
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static rtc::scoped_refptr<c##ProxyWithInternal> Create( \
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rtc::Thread* signaling_thread, \
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rtc::Thread* worker_thread, \
|
||
|
|
INTERNAL_CLASS* c) { \
|
||
|
|
return new rtc::RefCountedObject<c##ProxyWithInternal>( \
|
||
|
|
signaling_thread, worker_thread, c); \
|
||
|
|
} \
|
||
|
|
const INTERNAL_CLASS* internal() const { return c_.get(); } \
|
||
|
|
INTERNAL_CLASS* internal() { return c_.get(); }
|
||
|
|
|
||
|
|
#define PROXY_METHOD0(r, method) \
|
||
|
|
r method() override { \
|
||
|
|
MethodCall0<C, r> call(c_.get(), &C::method); \
|
||
|
|
return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define PROXY_CONSTMETHOD0(r, method) \
|
||
|
|
r method() const override { \
|
||
|
|
ConstMethodCall0<C, r> call(c_.get(), &C::method); \
|
||
|
|
return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define PROXY_METHOD1(r, method, t1) \
|
||
|
|
r method(t1 a1) override { \
|
||
|
|
MethodCall1<C, r, t1> call(c_.get(), &C::method, a1); \
|
||
|
|
return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define PROXY_CONSTMETHOD1(r, method, t1) \
|
||
|
|
r method(t1 a1) const override { \
|
||
|
|
ConstMethodCall1<C, r, t1> call(c_.get(), &C::method, a1); \
|
||
|
|
return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define PROXY_METHOD2(r, method, t1, t2) \
|
||
|
|
r method(t1 a1, t2 a2) override { \
|
||
|
|
MethodCall2<C, r, t1, t2> call(c_.get(), &C::method, a1, a2); \
|
||
|
|
return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define PROXY_METHOD3(r, method, t1, t2, t3) \
|
||
|
|
r method(t1 a1, t2 a2, t3 a3) override { \
|
||
|
|
MethodCall3<C, r, t1, t2, t3> call(c_.get(), &C::method, a1, a2, a3); \
|
||
|
|
return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define PROXY_METHOD4(r, method, t1, t2, t3, t4) \
|
||
|
|
r method(t1 a1, t2 a2, t3 a3, t4 a4) override { \
|
||
|
|
MethodCall4<C, r, t1, t2, t3, t4> call(c_.get(), &C::method, a1, a2, a3, \
|
||
|
|
a4); \
|
||
|
|
return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define PROXY_METHOD5(r, method, t1, t2, t3, t4, t5) \
|
||
|
|
r method(t1 a1, t2 a2, t3 a3, t4 a4, t5 a5) override { \
|
||
|
|
MethodCall5<C, r, t1, t2, t3, t4, t5> call(c_.get(), &C::method, a1, a2, \
|
||
|
|
a3, a4, a5); \
|
||
|
|
return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
|
||
|
|
}
|
||
|
|
|
||
|
|
// Define methods which should be invoked on the worker thread.
|
||
|
|
#define PROXY_WORKER_METHOD1(r, method, t1) \
|
||
|
|
r method(t1 a1) override { \
|
||
|
|
MethodCall1<C, r, t1> call(c_.get(), &C::method, a1); \
|
||
|
|
return call.Marshal(RTC_FROM_HERE, worker_thread_); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define PROXY_WORKER_METHOD2(r, method, t1, t2) \
|
||
|
|
r method(t1 a1, t2 a2) override { \
|
||
|
|
MethodCall2<C, r, t1, t2> call(c_.get(), &C::method, a1, a2); \
|
||
|
|
return call.Marshal(RTC_FROM_HERE, worker_thread_); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define END_SIGNALING_PROXY() \
|
||
|
|
private: \
|
||
|
|
void Release_s() { c_ = NULL; } \
|
||
|
|
mutable rtc::Thread* signaling_thread_; \
|
||
|
|
rtc::scoped_refptr<INTERNAL_CLASS> c_; \
|
||
|
|
} \
|
||
|
|
;
|
||
|
|
|
||
|
|
#define END_PROXY() \
|
||
|
|
private: \
|
||
|
|
void Release_s() { c_ = NULL; } \
|
||
|
|
mutable rtc::Thread* signaling_thread_; \
|
||
|
|
mutable rtc::Thread* worker_thread_; \
|
||
|
|
rtc::scoped_refptr<INTERNAL_CLASS> c_; \
|
||
|
|
} \
|
||
|
|
;
|
||
|
|
|
||
|
|
} // namespace webrtc
|
||
|
|
|
||
|
|
#endif // WEBRTC_API_PROXY_H_
|