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665174fdbb
Running clang-format with chromium's style guide. The goal is n-fold: * providing consistency and readability (that's what code guidelines are for) * preventing noise with presubmit checks and git cl format * building on the previous point: making it easier to automatically fix format issues * you name it Please consider using git-hyper-blame to ignore this commit. Bug: webrtc:9340 Change-Id: I694567c4cdf8cee2860958cfe82bfaf25848bb87 Reviewed-on: https://webrtc-review.googlesource.com/81185 Reviewed-by: Patrik Höglund <phoglund@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23660}
588 lines
21 KiB
C++
588 lines
21 KiB
C++
/*
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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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// TODO(deadbeef): Move this to pc/; this is part of the implementation.
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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_SIGNALING_THREAD_DESTRUCTOR()
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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_MAP()
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//
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// Where the destructor and first two methods are invoked on the signaling
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// thread, 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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//
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// The variant defined with BEGIN_OWNED_PROXY_MAP does not use
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// refcounting, and instead just takes ownership of the object being proxied.
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#ifndef API_PROXY_H_
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#define API_PROXY_H_
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#include <memory>
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#include <utility>
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#include "rtc_base/event.h"
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#include "rtc_base/refcountedobject.h"
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#include "rtc_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) {
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r_ = (c->*m)();
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}
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template <typename C, typename M, typename T1>
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void Invoke(C* c, M m, T1 a1) {
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r_ = (c->*m)(std::move(a1));
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}
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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) {
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r_ = (c->*m)(std::move(a1), std::move(a2));
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}
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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) {
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r_ = (c->*m)(std::move(a1), std::move(a2), std::move(a3));
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}
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template <typename C,
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typename M,
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typename T1,
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typename T2,
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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)(std::move(a1), std::move(a2), std::move(a3), std::move(a4));
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}
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template <typename C,
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typename M,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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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)(std::move(a1), std::move(a2), std::move(a3), std::move(a4),
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std::move(a5));
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}
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R moved_result() { return std::move(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) {
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(c->*m)();
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}
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template <typename C, typename M, typename T1>
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void Invoke(C* c, M m, T1 a1) {
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(c->*m)(std::move(a1));
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}
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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) {
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(c->*m)(std::move(a1), std::move(a2));
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}
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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) {
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(c->*m)(std::move(a1), std::move(a2), std::move(a3));
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}
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void moved_result() {}
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};
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namespace internal {
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class SynchronousMethodCall : 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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~SynchronousMethodCall() override;
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void Invoke(const rtc::Location& posted_from, rtc::Thread* t);
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private:
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void OnMessage(rtc::Message*) override;
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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, 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_.moved_result();
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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, 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_.moved_result();
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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, 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_(std::move(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_.moved_result();
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}
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private:
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void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, std::move(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, 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_(std::move(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_.moved_result();
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}
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private:
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void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, std::move(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, 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)
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: c_(c), m_(m), a1_(std::move(a1)), a2_(std::move(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_.moved_result();
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}
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private:
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void OnMessage(rtc::Message*) {
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r_.Invoke(c_, m_, std::move(a1_), std::move(a2_));
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}
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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, 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),
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m_(m),
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a1_(std::move(a1)),
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a2_(std::move(a2)),
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a3_(std::move(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_.moved_result();
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}
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private:
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void OnMessage(rtc::Message*) {
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r_.Invoke(c_, m_, std::move(a1_), std::move(a2_), std::move(a3_));
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}
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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,
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typename R,
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typename T1,
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typename T2,
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typename T3,
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typename T4>
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class MethodCall4 : public rtc::Message, 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),
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m_(m),
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a1_(std::move(a1)),
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a2_(std::move(a2)),
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a3_(std::move(a3)),
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a4_(std::move(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_.moved_result();
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}
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private:
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void OnMessage(rtc::Message*) {
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r_.Invoke(c_, m_, std::move(a1_), std::move(a2_), std::move(a3_),
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std::move(a4_));
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}
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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,
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typename R,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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typename T5>
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class MethodCall5 : public rtc::Message, 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),
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m_(m),
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a1_(std::move(a1)),
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a2_(std::move(a2)),
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a3_(std::move(a3)),
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a4_(std::move(a4)),
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a5_(std::move(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_.moved_result();
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}
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private:
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void OnMessage(rtc::Message*) {
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r_.Invoke(c_, m_, std::move(a1_), std::move(a2_), std::move(a3_),
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std::move(a4_), std::move(a5_));
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}
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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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// Helper macros to reduce code duplication.
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#define PROXY_MAP_BOILERPLATE(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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\
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public: \
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const INTERNAL_CLASS* internal() const { return c_; } \
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INTERNAL_CLASS* internal() { return c_; }
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// clang-format off
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// clang-format would put the semicolon alone,
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// leading to a presubmit error (cpplint.py)
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#define END_PROXY_MAP() \
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};
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// clang-format on
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#define SIGNALING_PROXY_MAP_BOILERPLATE(c) \
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protected: \
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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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\
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private: \
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mutable rtc::Thread* signaling_thread_;
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#define WORKER_PROXY_MAP_BOILERPLATE(c) \
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protected: \
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c##ProxyWithInternal(rtc::Thread* signaling_thread, \
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rtc::Thread* worker_thread, 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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\
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private: \
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mutable rtc::Thread* signaling_thread_; \
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mutable rtc::Thread* worker_thread_;
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// Note that the destructor is protected so that the proxy can only be
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// destroyed via RefCountInterface.
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#define REFCOUNTED_PROXY_MAP_BOILERPLATE(c) \
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protected: \
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~c##ProxyWithInternal() { \
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MethodCall0<c##ProxyWithInternal, void> call( \
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this, &c##ProxyWithInternal::DestroyInternal); \
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call.Marshal(RTC_FROM_HERE, destructor_thread()); \
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} \
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\
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private: \
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void DestroyInternal() { c_ = nullptr; } \
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rtc::scoped_refptr<INTERNAL_CLASS> c_;
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// Note: This doesn't use a unique_ptr, because it intends to handle a corner
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// case where an object's deletion triggers a callback that calls back into
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// this proxy object. If relying on a unique_ptr to delete the object, its
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// inner pointer would be set to null before this reentrant callback would have
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// a chance to run, resulting in a segfault.
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#define OWNED_PROXY_MAP_BOILERPLATE(c) \
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public: \
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~c##ProxyWithInternal() { \
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MethodCall0<c##ProxyWithInternal, void> call( \
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this, &c##ProxyWithInternal::DestroyInternal); \
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call.Marshal(RTC_FROM_HERE, destructor_thread()); \
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} \
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\
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private: \
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void DestroyInternal() { delete c_; } \
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INTERNAL_CLASS* c_;
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#define BEGIN_SIGNALING_PROXY_MAP(c) \
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PROXY_MAP_BOILERPLATE(c) \
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SIGNALING_PROXY_MAP_BOILERPLATE(c) \
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REFCOUNTED_PROXY_MAP_BOILERPLATE(c) \
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public: \
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static rtc::scoped_refptr<c##ProxyWithInternal> Create( \
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rtc::Thread* signaling_thread, 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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#define BEGIN_PROXY_MAP(c) \
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PROXY_MAP_BOILERPLATE(c) \
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WORKER_PROXY_MAP_BOILERPLATE(c) \
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REFCOUNTED_PROXY_MAP_BOILERPLATE(c) \
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public: \
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static rtc::scoped_refptr<c##ProxyWithInternal> Create( \
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rtc::Thread* signaling_thread, rtc::Thread* worker_thread, \
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INTERNAL_CLASS* c) { \
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return new rtc::RefCountedObject<c##ProxyWithInternal>(signaling_thread, \
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worker_thread, c); \
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}
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#define BEGIN_OWNED_PROXY_MAP(c) \
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PROXY_MAP_BOILERPLATE(c) \
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WORKER_PROXY_MAP_BOILERPLATE(c) \
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OWNED_PROXY_MAP_BOILERPLATE(c) \
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public: \
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static std::unique_ptr<c##Interface> Create( \
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rtc::Thread* signaling_thread, rtc::Thread* worker_thread, \
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std::unique_ptr<INTERNAL_CLASS> c) { \
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return std::unique_ptr<c##Interface>(new c##ProxyWithInternal( \
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signaling_thread, worker_thread, c.release())); \
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}
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#define PROXY_SIGNALING_THREAD_DESTRUCTOR() \
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private: \
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rtc::Thread* destructor_thread() const { return signaling_thread_; } \
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\
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public: // NOLINTNEXTLINE
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#define PROXY_WORKER_THREAD_DESTRUCTOR() \
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private: \
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rtc::Thread* destructor_thread() const { return worker_thread_; } \
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\
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public: // NOLINTNEXTLINE
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#define PROXY_METHOD0(r, method) \
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r method() override { \
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MethodCall0<C, r> call(c_, &C::method); \
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return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
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}
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#define PROXY_CONSTMETHOD0(r, method) \
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r method() const override { \
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ConstMethodCall0<C, r> call(c_, &C::method); \
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return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
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}
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#define PROXY_METHOD1(r, method, t1) \
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r method(t1 a1) override { \
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MethodCall1<C, r, t1> call(c_, &C::method, std::move(a1)); \
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return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
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}
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#define PROXY_CONSTMETHOD1(r, method, t1) \
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r method(t1 a1) const override { \
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ConstMethodCall1<C, r, t1> call(c_, &C::method, std::move(a1)); \
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return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
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}
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#define PROXY_METHOD2(r, method, t1, t2) \
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r method(t1 a1, t2 a2) override { \
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MethodCall2<C, r, t1, t2> call(c_, &C::method, std::move(a1), \
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std::move(a2)); \
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return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
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}
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#define PROXY_METHOD3(r, method, t1, t2, t3) \
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r method(t1 a1, t2 a2, t3 a3) override { \
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MethodCall3<C, r, t1, t2, t3> call(c_, &C::method, std::move(a1), \
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std::move(a2), std::move(a3)); \
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return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
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}
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#define PROXY_METHOD4(r, method, t1, t2, t3, t4) \
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r method(t1 a1, t2 a2, t3 a3, t4 a4) override { \
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MethodCall4<C, r, t1, t2, t3, t4> call(c_, &C::method, std::move(a1), \
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std::move(a2), std::move(a3), \
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std::move(a4)); \
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return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
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}
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#define PROXY_METHOD5(r, method, t1, t2, t3, t4, t5) \
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r method(t1 a1, t2 a2, t3 a3, t4 a4, t5 a5) override { \
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MethodCall5<C, r, t1, t2, t3, t4, t5> call(c_, &C::method, std::move(a1), \
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std::move(a2), std::move(a3), \
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std::move(a4), std::move(a5)); \
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return call.Marshal(RTC_FROM_HERE, signaling_thread_); \
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}
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// Define methods which should be invoked on the worker thread.
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#define PROXY_WORKER_METHOD0(r, method) \
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r method() override { \
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MethodCall0<C, r> call(c_, &C::method); \
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return call.Marshal(RTC_FROM_HERE, worker_thread_); \
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}
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#define PROXY_WORKER_CONSTMETHOD0(r, method) \
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r method() const override { \
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ConstMethodCall0<C, r> call(c_, &C::method); \
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return call.Marshal(RTC_FROM_HERE, worker_thread_); \
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}
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#define PROXY_WORKER_METHOD1(r, method, t1) \
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r method(t1 a1) override { \
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MethodCall1<C, r, t1> call(c_, &C::method, std::move(a1)); \
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return call.Marshal(RTC_FROM_HERE, worker_thread_); \
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}
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#define PROXY_WORKER_CONSTMETHOD1(r, method, t1) \
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r method(t1 a1) const override { \
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ConstMethodCall1<C, r, t1> call(c_, &C::method, std::move(a1)); \
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return call.Marshal(RTC_FROM_HERE, worker_thread_); \
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}
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#define PROXY_WORKER_METHOD2(r, method, t1, t2) \
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r method(t1 a1, t2 a2) override { \
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MethodCall2<C, r, t1, t2> call(c_, &C::method, std::move(a1), \
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std::move(a2)); \
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return call.Marshal(RTC_FROM_HERE, worker_thread_); \
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}
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|
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#define PROXY_WORKER_CONSTMETHOD2(r, method, t1, t2) \
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r method(t1 a1, t2 a2) const override { \
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ConstMethodCall2<C, r, t1, t2> call(c_, &C::method, std::move(a1), \
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std::move(a2)); \
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return call.Marshal(RTC_FROM_HERE, worker_thread_); \
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}
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|
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#define PROXY_WORKER_METHOD3(r, method, t1, t2, t3) \
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r method(t1 a1, t2 a2, t3 a3) override { \
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MethodCall3<C, r, t1, t2, t3> call(c_, &C::method, std::move(a1), \
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std::move(a2), std::move(a3)); \
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|
return call.Marshal(RTC_FROM_HERE, worker_thread_); \
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|
}
|
|
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#define PROXY_WORKER_CONSTMETHOD3(r, method, t1, t2) \
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|
r method(t1 a1, t2 a2, t3 a3) const override { \
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|
ConstMethodCall3<C, r, t1, t2, t3> call(c_, &C::method, std::move(a1), \
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|
std::move(a2), std::move(a3)); \
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|
return call.Marshal(RTC_FROM_HERE, worker_thread_); \
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|
}
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} // namespace webrtc
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#endif // API_PROXY_H_
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