1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // This file provides infrastructure for dispatching host resource call 6 // messages. Normal IPC message handlers can't take extra parameters or 7 // return values. We want to take a HostMessageContext as a parameter and 8 // also return the int32_t return value to the caller. 9 10 #ifndef PPAPI_HOST_DISPATCH_HOST_MESSAGE_H_ 11 #define PPAPI_HOST_DISPATCH_HOST_MESSAGE_H_ 12 13 #include "base/profiler/scoped_profile.h" // For TRACK_RUN_IN_IPC_HANDLER. 14 #include "ipc/ipc_message_macros.h" 15 #include "ppapi/c/pp_errors.h" 16 17 namespace ppapi { 18 namespace host { 19 20 struct HostMessageContext; 21 22 template <class ObjT, class Method> 23 inline int32_t DispatchResourceCall(ObjT* obj, Method method, 24 HostMessageContext* context, 25 Tuple0& arg) { 26 return (obj->*method)(context); 27 } 28 29 template <class ObjT, class Method, class A> 30 inline int32_t DispatchResourceCall(ObjT* obj, Method method, 31 HostMessageContext* context, 32 Tuple1<A>& arg) { 33 return (obj->*method)(context, arg.a); 34 } 35 36 template<class ObjT, class Method, class A, class B> 37 inline int32_t DispatchResourceCall(ObjT* obj, Method method, 38 HostMessageContext* context, 39 Tuple2<A, B>& arg) { 40 return (obj->*method)(context, arg.a, arg.b); 41 } 42 43 template<class ObjT, class Method, class A, class B, class C> 44 inline int32_t DispatchResourceCall(ObjT* obj, Method method, 45 HostMessageContext* context, 46 Tuple3<A, B, C>& arg) { 47 return (obj->*method)(context, arg.a, arg.b, arg.c); 48 } 49 50 template<class ObjT, class Method, class A, class B, class C, class D> 51 inline int32_t DispatchResourceCall(ObjT* obj, Method method, 52 HostMessageContext* context, 53 Tuple4<A, B, C, D>& arg) { 54 return (obj->*method)(context, arg.a, arg.b, arg.c, arg.d); 55 } 56 57 template<class ObjT, class Method, class A, class B, class C, class D, class E> 58 inline int32_t DispatchResourceCall(ObjT* obj, Method method, 59 HostMessageContext* context, 60 Tuple5<A, B, C, D, E>& arg) { 61 return (obj->*method)(context, arg.a, arg.b, arg.c, arg.d, arg.e); 62 } 63 64 // Note that this only works for message with 1 or more parameters. For 65 // 0-parameter messages you need to use the _0 version below (since there are 66 // no params in the message). 67 #define PPAPI_DISPATCH_HOST_RESOURCE_CALL(msg_class, member_func) \ 68 case msg_class::ID: { \ 69 TRACK_RUN_IN_IPC_HANDLER(member_func); \ 70 msg_class::Schema::Param p; \ 71 if (msg_class::Read(&ipc_message__, &p)) { \ 72 return ppapi::host::DispatchResourceCall( \ 73 this, \ 74 &_IpcMessageHandlerClass::member_func, \ 75 context, p); \ 76 } \ 77 return PP_ERROR_FAILED; \ 78 } 79 80 #define PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(msg_class, member_func) \ 81 case msg_class::ID: { \ 82 TRACK_RUN_IN_IPC_HANDLER(member_func); \ 83 return member_func(context); \ 84 } 85 86 } // namespace host 87 } // namespace ppapi 88 89 #endif // PPAPI_HOST_DISPATCH_HOST_MESSAGE_H_ 90
