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1 /* | |
2 * libjingle | |
3 * Copyright 2013 Google Inc. | |
4 * | |
5 * Redistribution and use in source and binary forms, with or without | |
6 * modification, are permitted provided that the following conditions are met: | |
7 * | |
8 * 1. Redistributions of source code must retain the above copyright notice, | |
9 * this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright notice, | |
11 * this list of conditions and the following disclaimer in the documentation | |
12 * and/or other materials provided with the distribution. | |
13 * 3. The name of the author may not be used to endorse or promote products | |
14 * derived from this software without specific prior written permission. | |
15 * | |
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 */ | |
27 | |
28 // This file contains Macros for creating proxies for webrtc MediaStream and | |
29 // PeerConnection classes. | |
30 | |
31 // | |
32 // Example usage: | |
33 // | |
34 // class TestInterface : public rtc::RefCountInterface { | |
35 // public: | |
36 // std::string FooA() = 0; | |
37 // std::string FooB(bool arg1) const = 0; | |
38 // std::string FooC(bool arg1)= 0; | |
39 // }; | |
40 // | |
41 // Note that return types can not be a const reference. | |
42 // | |
43 // class Test : public TestInterface { | |
44 // ... implementation of the interface. | |
45 // }; | |
46 // | |
47 // BEGIN_PROXY_MAP(Test) | |
48 // PROXY_METHOD0(std::string, FooA) | |
49 // PROXY_CONSTMETHOD1(std::string, FooB, arg1) | |
50 // PROXY_METHOD1(std::string, FooC, arg1) | |
51 // END_PROXY() | |
52 // | |
53 // The proxy can be created using TestProxy::Create(Thread*, TestInterface*). | |
54 | |
55 #ifndef TALK_APP_WEBRTC_PROXY_H_ | |
56 #define TALK_APP_WEBRTC_PROXY_H_ | |
57 | |
58 #include "webrtc/base/event.h" | |
59 #include "webrtc/base/thread.h" | |
60 | |
61 namespace webrtc { | |
62 | |
63 template <typename R> | |
64 class ReturnType { | |
65 public: | |
66 template<typename C, typename M> | |
67 void Invoke(C* c, M m) { r_ = (c->*m)(); } | |
68 template<typename C, typename M, typename T1> | |
69 void Invoke(C* c, M m, T1 a1) { r_ = (c->*m)(a1); } | |
70 template<typename C, typename M, typename T1, typename T2> | |
71 void Invoke(C* c, M m, T1 a1, T2 a2) { r_ = (c->*m)(a1, a2); } | |
72 template<typename C, typename M, typename T1, typename T2, typename T3> | |
73 void Invoke(C* c, M m, T1 a1, T2 a2, T3 a3) { r_ = (c->*m)(a1, a2, a3); } | |
74 template<typename C, typename M, typename T1, typename T2, typename T3, | |
75 typename T4> | |
76 void Invoke(C* c, M m, T1 a1, T2 a2, T3 a3, T4 a4) { | |
77 r_ = (c->*m)(a1, a2, a3, a4); | |
78 } | |
79 template<typename C, typename M, typename T1, typename T2, typename T3, | |
80 typename T4, typename T5> | |
81 void Invoke(C* c, M m, T1 a1, T2 a2, T3 a3, T4 a4, T5 a5) { | |
82 r_ = (c->*m)(a1, a2, a3, a4, a5); | |
83 } | |
84 | |
85 R value() { return r_; } | |
86 | |
87 private: | |
88 R r_; | |
89 }; | |
90 | |
91 template <> | |
92 class ReturnType<void> { | |
93 public: | |
94 template<typename C, typename M> | |
95 void Invoke(C* c, M m) { (c->*m)(); } | |
96 template<typename C, typename M, typename T1> | |
97 void Invoke(C* c, M m, T1 a1) { (c->*m)(a1); } | |
98 template<typename C, typename M, typename T1, typename T2> | |
99 void Invoke(C* c, M m, T1 a1, T2 a2) { (c->*m)(a1, a2); } | |
100 template<typename C, typename M, typename T1, typename T2, typename T3> | |
101 void Invoke(C* c, M m, T1 a1, T2 a2, T3 a3) { (c->*m)(a1, a2, a3); } | |
102 | |
103 void value() {} | |
104 }; | |
105 | |
106 namespace internal { | |
107 | |
108 class SynchronousMethodCall | |
109 : public rtc::MessageData, | |
110 public rtc::MessageHandler { | |
111 public: | |
112 explicit SynchronousMethodCall(rtc::MessageHandler* proxy) | |
113 : e_(), proxy_(proxy) {} | |
114 ~SynchronousMethodCall() {} | |
115 | |
116 void Invoke(rtc::Thread* t) { | |
117 if (t->IsCurrent()) { | |
118 proxy_->OnMessage(NULL); | |
119 } else { | |
120 e_.reset(new rtc::Event(false, false)); | |
121 t->Post(this, 0); | |
122 e_->Wait(rtc::Event::kForever); | |
123 } | |
124 } | |
125 | |
126 private: | |
127 void OnMessage(rtc::Message*) { proxy_->OnMessage(NULL); e_->Set(); } | |
128 rtc::scoped_ptr<rtc::Event> e_; | |
129 rtc::MessageHandler* proxy_; | |
130 }; | |
131 | |
132 } // namespace internal | |
133 | |
134 template <typename C, typename R> | |
135 class MethodCall0 : public rtc::Message, | |
136 public rtc::MessageHandler { | |
137 public: | |
138 typedef R (C::*Method)(); | |
139 MethodCall0(C* c, Method m) : c_(c), m_(m) {} | |
140 | |
141 R Marshal(rtc::Thread* t) { | |
142 internal::SynchronousMethodCall(this).Invoke(t); | |
143 return r_.value(); | |
144 } | |
145 | |
146 private: | |
147 void OnMessage(rtc::Message*) { r_.Invoke(c_, m_); } | |
148 | |
149 C* c_; | |
150 Method m_; | |
151 ReturnType<R> r_; | |
152 }; | |
153 | |
154 template <typename C, typename R> | |
155 class ConstMethodCall0 : public rtc::Message, | |
156 public rtc::MessageHandler { | |
157 public: | |
158 typedef R (C::*Method)() const; | |
159 ConstMethodCall0(C* c, Method m) : c_(c), m_(m) {} | |
160 | |
161 R Marshal(rtc::Thread* t) { | |
162 internal::SynchronousMethodCall(this).Invoke(t); | |
163 return r_.value(); | |
164 } | |
165 | |
166 private: | |
167 void OnMessage(rtc::Message*) { r_.Invoke(c_, m_); } | |
168 | |
169 C* c_; | |
170 Method m_; | |
171 ReturnType<R> r_; | |
172 }; | |
173 | |
174 template <typename C, typename R, typename T1> | |
175 class MethodCall1 : public rtc::Message, | |
176 public rtc::MessageHandler { | |
177 public: | |
178 typedef R (C::*Method)(T1 a1); | |
179 MethodCall1(C* c, Method m, T1 a1) : c_(c), m_(m), a1_(a1) {} | |
180 | |
181 R Marshal(rtc::Thread* t) { | |
182 internal::SynchronousMethodCall(this).Invoke(t); | |
183 return r_.value(); | |
184 } | |
185 | |
186 private: | |
187 void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_); } | |
188 | |
189 C* c_; | |
190 Method m_; | |
191 ReturnType<R> r_; | |
192 T1 a1_; | |
193 }; | |
194 | |
195 template <typename C, typename R, typename T1> | |
196 class ConstMethodCall1 : public rtc::Message, | |
197 public rtc::MessageHandler { | |
198 public: | |
199 typedef R (C::*Method)(T1 a1) const; | |
200 ConstMethodCall1(C* c, Method m, T1 a1) : c_(c), m_(m), a1_(a1) {} | |
201 | |
202 R Marshal(rtc::Thread* t) { | |
203 internal::SynchronousMethodCall(this).Invoke(t); | |
204 return r_.value(); | |
205 } | |
206 | |
207 private: | |
208 void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_); } | |
209 | |
210 C* c_; | |
211 Method m_; | |
212 ReturnType<R> r_; | |
213 T1 a1_; | |
214 }; | |
215 | |
216 template <typename C, typename R, typename T1, typename T2> | |
217 class MethodCall2 : public rtc::Message, | |
218 public rtc::MessageHandler { | |
219 public: | |
220 typedef R (C::*Method)(T1 a1, T2 a2); | |
221 MethodCall2(C* c, Method m, T1 a1, T2 a2) : c_(c), m_(m), a1_(a1), a2_(a2) {} | |
222 | |
223 R Marshal(rtc::Thread* t) { | |
224 internal::SynchronousMethodCall(this).Invoke(t); | |
225 return r_.value(); | |
226 } | |
227 | |
228 private: | |
229 void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_, a2_); } | |
230 | |
231 C* c_; | |
232 Method m_; | |
233 ReturnType<R> r_; | |
234 T1 a1_; | |
235 T2 a2_; | |
236 }; | |
237 | |
238 template <typename C, typename R, typename T1, typename T2, typename T3> | |
239 class MethodCall3 : public rtc::Message, | |
240 public rtc::MessageHandler { | |
241 public: | |
242 typedef R (C::*Method)(T1 a1, T2 a2, T3 a3); | |
243 MethodCall3(C* c, Method m, T1 a1, T2 a2, T3 a3) | |
244 : c_(c), m_(m), a1_(a1), a2_(a2), a3_(a3) {} | |
245 | |
246 R Marshal(rtc::Thread* t) { | |
247 internal::SynchronousMethodCall(this).Invoke(t); | |
248 return r_.value(); | |
249 } | |
250 | |
251 private: | |
252 void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_, a2_, a3_); } | |
253 | |
254 C* c_; | |
255 Method m_; | |
256 ReturnType<R> r_; | |
257 T1 a1_; | |
258 T2 a2_; | |
259 T3 a3_; | |
260 }; | |
261 | |
262 template <typename C, typename R, typename T1, typename T2, typename T3, | |
263 typename T4> | |
264 class MethodCall4 : public rtc::Message, | |
265 public rtc::MessageHandler { | |
266 public: | |
267 typedef R (C::*Method)(T1 a1, T2 a2, T3 a3, T4 a4); | |
268 MethodCall4(C* c, Method m, T1 a1, T2 a2, T3 a3, T4 a4) | |
269 : c_(c), m_(m), a1_(a1), a2_(a2), a3_(a3), a4_(a4) {} | |
270 | |
271 R Marshal(rtc::Thread* t) { | |
272 internal::SynchronousMethodCall(this).Invoke(t); | |
273 return r_.value(); | |
274 } | |
275 | |
276 private: | |
277 void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_, a2_, a3_, a4_); } | |
278 | |
279 C* c_; | |
280 Method m_; | |
281 ReturnType<R> r_; | |
282 T1 a1_; | |
283 T2 a2_; | |
284 T3 a3_; | |
285 T4 a4_; | |
286 }; | |
287 | |
288 template <typename C, typename R, typename T1, typename T2, typename T3, | |
289 typename T4, typename T5> | |
290 class MethodCall5 : public rtc::Message, | |
291 public rtc::MessageHandler { | |
292 public: | |
293 typedef R (C::*Method)(T1 a1, T2 a2, T3 a3, T4 a4, T5 a5); | |
294 MethodCall5(C* c, Method m, T1 a1, T2 a2, T3 a3, T4 a4, T5 a5) | |
295 : c_(c), m_(m), a1_(a1), a2_(a2), a3_(a3), a4_(a4), a5_(a5) {} | |
296 | |
297 R Marshal(rtc::Thread* t) { | |
298 internal::SynchronousMethodCall(this).Invoke(t); | |
299 return r_.value(); | |
300 } | |
301 | |
302 private: | |
303 void OnMessage(rtc::Message*) { r_.Invoke(c_, m_, a1_, a2_, a3_, a4_, a5_); } | |
304 | |
305 C* c_; | |
306 Method m_; | |
307 ReturnType<R> r_; | |
308 T1 a1_; | |
309 T2 a2_; | |
310 T3 a3_; | |
311 T4 a4_; | |
312 T5 a5_; | |
313 }; | |
314 | |
315 #define BEGIN_PROXY_MAP(c) \ | |
316 class c##Proxy : public c##Interface { \ | |
317 protected: \ | |
318 typedef c##Interface C; \ | |
319 c##Proxy(rtc::Thread* thread, C* c) : owner_thread_(thread), c_(c) {} \ | |
320 ~c##Proxy() { \ | |
321 MethodCall0<c##Proxy, void> call(this, &c##Proxy::Release_s); \ | |
322 call.Marshal(owner_thread_); \ | |
323 } \ | |
324 \ | |
325 public: \ | |
326 static rtc::scoped_refptr<C> Create(rtc::Thread* thread, C* c) { \ | |
327 return new rtc::RefCountedObject<c##Proxy>(thread, c); \ | |
328 } | |
329 | |
330 #define PROXY_METHOD0(r, method) \ | |
331 r method() override { \ | |
332 MethodCall0<C, r> call(c_.get(), &C::method); \ | |
333 return call.Marshal(owner_thread_); \ | |
334 } | |
335 | |
336 #define PROXY_CONSTMETHOD0(r, method) \ | |
337 r method() const override { \ | |
338 ConstMethodCall0<C, r> call(c_.get(), &C::method); \ | |
339 return call.Marshal(owner_thread_); \ | |
340 } | |
341 | |
342 #define PROXY_METHOD1(r, method, t1) \ | |
343 r method(t1 a1) override { \ | |
344 MethodCall1<C, r, t1> call(c_.get(), &C::method, a1); \ | |
345 return call.Marshal(owner_thread_); \ | |
346 } | |
347 | |
348 #define PROXY_CONSTMETHOD1(r, method, t1) \ | |
349 r method(t1 a1) const override { \ | |
350 ConstMethodCall1<C, r, t1> call(c_.get(), &C::method, a1); \ | |
351 return call.Marshal(owner_thread_); \ | |
352 } | |
353 | |
354 #define PROXY_METHOD2(r, method, t1, t2) \ | |
355 r method(t1 a1, t2 a2) override { \ | |
356 MethodCall2<C, r, t1, t2> call(c_.get(), &C::method, a1, a2); \ | |
357 return call.Marshal(owner_thread_); \ | |
358 } | |
359 | |
360 #define PROXY_METHOD3(r, method, t1, t2, t3) \ | |
361 r method(t1 a1, t2 a2, t3 a3) override { \ | |
362 MethodCall3<C, r, t1, t2, t3> call(c_.get(), &C::method, a1, a2, a3); \ | |
363 return call.Marshal(owner_thread_); \ | |
364 } | |
365 | |
366 #define PROXY_METHOD4(r, method, t1, t2, t3, t4) \ | |
367 r method(t1 a1, t2 a2, t3 a3, t4 a4) override { \ | |
368 MethodCall4<C, r, t1, t2, t3, t4> call(c_.get(), &C::method, a1, a2, a3, \ | |
369 a4); \ | |
370 return call.Marshal(owner_thread_); \ | |
371 } | |
372 | |
373 #define PROXY_METHOD5(r, method, t1, t2, t3, t4, t5) \ | |
374 r method(t1 a1, t2 a2, t3 a3, t4 a4, t5 a5) override { \ | |
375 MethodCall5<C, r, t1, t2, t3, t4, t5> call(c_.get(), &C::method, a1, a2, \ | |
376 a3, a4, a5); \ | |
377 return call.Marshal(owner_thread_); \ | |
378 } | |
379 | |
380 #define END_PROXY() \ | |
381 private:\ | |
382 void Release_s() {\ | |
383 c_ = NULL;\ | |
384 }\ | |
385 mutable rtc::Thread* owner_thread_;\ | |
386 rtc::scoped_refptr<C> c_;\ | |
387 };\ | |
388 | |
389 } // namespace webrtc | |
390 | |
391 #endif // TALK_APP_WEBRTC_PROXY_H_ | |
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