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 // Defining IPC Messages 6 // 7 // Your IPC messages will be defined by macros inside of an XXX_messages.h 8 // header file. Most of the time, the system can automatically generate all 9 // of messaging mechanism from these definitions, but sometimes some manual 10 // coding is required. In these cases, you will also have an XXX_messages.cc 11 // implemation file as well. 12 // 13 // The senders of your messages will include your XXX_messages.h file to 14 // get the full set of definitions they need to send your messages. 15 // 16 // Each XXX_messages.h file must be registered with the IPC system. This 17 // requires adding two things: 18 // - An XXXMsgStart value to the IPCMessageStart enum in ipc_message_start.h 19 // - An inclusion of XXX_messages.h file in a message generator .h file 20 // 21 // The XXXMsgStart value is an enumeration that ensures uniqueness for 22 // each different message file. Later, you will use this inside your 23 // XXX_messages.h file before invoking message declaration macros: 24 // #define IPC_MESSAGE_START XXXMsgStart 25 // ( ... your macro invocations go here ... ) 26 // 27 // Message Generator Files 28 // 29 // A message generator .h header file pulls in all other message-declaring 30 // headers for a given component. It is included by a message generator 31 // .cc file, which is where all the generated code will wind up. Typically, 32 // you will use an existing generator (e.g. common_message_generator.cc 33 // in /chrome/common), but there are circumstances where you may add a 34 // new one. 35 // 36 // In the rare cicrucmstances where you can't re-use an existing file, 37 // your YYY_message_generator.cc file for a component YYY would contain 38 // the following code: 39 // // Get basic type definitions. 40 // #define IPC_MESSAGE_IMPL 41 // #include "path/to/YYY_message_generator.h" 42 // // Generate constructors. 43 // #include "ipc/struct_constructor_macros.h" 44 // #include "path/to/YYY_message_generator.h" 45 // // Generate destructors. 46 // #include "ipc/struct_destructor_macros.h" 47 // #include "path/to/YYY_message_generator.h" 48 // // Generate param traits write methods. 49 // #include "ipc/param_traits_write_macros.h" 50 // namespace IPC { 51 // #include "path/to/YYY_message_generator.h" 52 // } // namespace IPC 53 // // Generate param traits read methods. 54 // #include "ipc/param_traits_read_macros.h" 55 // namespace IPC { 56 // #include "path/to/YYY_message_generator.h" 57 // } // namespace IPC 58 // // Generate param traits log methods. 59 // #include "ipc/param_traits_log_macros.h" 60 // namespace IPC { 61 // #include "path/to/YYY_message_generator.h" 62 // } // namespace IPC 63 // 64 // In cases where manual generation is required, in your XXX_messages.cc 65 // file, put the following after all the includes for param types: 66 // #define IPC_MESSAGE_IMPL 67 // #include "XXX_messages.h" 68 // (... implementation of traits not auto-generated ...) 69 // 70 // Multiple Inclusion 71 // 72 // The XXX_messages.h file will be multiply-included by the 73 // YYY_message_generator.cc file, so your XXX_messages file can't be 74 // guarded in the usual manner. Ideally, there will be no need for any 75 // inclusion guard, since the XXX_messages.h file should consist soley 76 // of inclusions of other headers (which are self-guarding) and IPC 77 // macros (which are multiply evaluating). 78 // 79 // Note that #pragma once cannot be used here; doing so would mark the whole 80 // file as being singly-included. Since your XXX_messages.h file is only 81 // partially-guarded, care must be taken to ensure that it is only included 82 // by other .cc files (and the YYY_message_generator.h file). Including an 83 // XXX_messages.h file in some other .h file may result in duplicate 84 // declarations and a compilation failure. 85 // 86 // Type Declarations 87 // 88 // It is generally a bad idea to have type definitions in a XXX_messages.h 89 // file; most likely the typedef will then be used in the message, as opposed 90 // to the struct iself. Later, an IPC message dispatcher wil need to call 91 // a function taking that type, and that function is declared in some other 92 // header. Thus, in order to get the type definition, the other header 93 // would have to include the XXX_messages.h file, violating the rule above 94 // about not including XXX_messages.h file in other .h files. 95 // 96 // One approach here is to move these type definitions to another (guarded) 97 // .h file and include this second .h in your XXX_messages.h file. This 98 // is still less than ideal, because the dispatched function would have to 99 // redeclare the typedef or include this second header. This may be 100 // reasonable in a few cases. 101 // 102 // Failing all of the above, then you will want to bracket the smallest 103 // possible section of your XXX_messages.h file containing these types 104 // with an include guard macro. Be aware that providing an incomplete 105 // class type declaration to avoid pulling in a long chain of headers is 106 // acceptable when your XXX_messages.h header is being included by the 107 // message sending caller's code, but not when the YYY_message_generator.c 108 // is building the messages. In addtion, due to the multiple inclusion 109 // restriction, these type ought to be guarded. Follow a convention like: 110 // #ifndef SOME_GUARD_MACRO 111 // #define SOME_GUARD_MACRO 112 // class some_class; // One incomplete class declaration 113 // class_some_other_class; // Another incomplete class declaration 114 // #endif // SOME_GUARD_MACRO 115 // #ifdef IPC_MESSAGE_IMPL 116 // #inlcude "path/to/some_class.h" // Full class declaration 117 // #inlcude "path/to/some_other_class.h" // Full class declaration 118 // #endif // IPC_MESSAGE_IMPL 119 // (.. IPC macros using some_class and some_other_class ...) 120 // 121 // Macro Invocations 122 // 123 // You will use IPC message macro invocations for three things: 124 // - New struct definitions for IPC 125 // - Registering existing struct and enum definitions with IPC 126 // - Defining the messages themselves 127 // 128 // New structs are defined with IPC_STRUCT_BEGIN(), IPC_STRUCT_MEMBER(), 129 // IPC_STRUCT_END() family of macros. These cause the XXX_messages.h 130 // to proclaim equivalent struct declarations for use by callers, as well 131 // as later registering the type with the message generation. Note that 132 // IPC_STRUCT_MEMBER() is only permitted inside matching calls to 133 // IPC_STRUCT_BEGIN() / IPC_STRUCT_END(). There is also an 134 // IPC_STRUCT_BEGIN_WITH_PARENT(), which behaves like IPC_STRUCT_BEGIN(), 135 // but also accomodates structs that inherit from other structs. 136 // 137 // Externally-defined structs are registered with IPC_STRUCT_TRAITS_BEGIN(), 138 // IPC_STRUCT_TRAITS_MEMBER(), and IPC_STRUCT_TRAITS_END() macros. These 139 // cause registration of the types with message generation only. 140 // There's also IPC_STRUCT_TRAITS_PARENT, which is used to register a parent 141 // class (whose own traits are already defined). Note that 142 // IPC_STRUCT_TRAITS_MEMBER() and IPC_STRUCT_TRAITS_PARENT are only permitted 143 // inside matching calls to IPC_STRUCT_TRAITS_BEGIN() / 144 // IPC_STRUCT_TRAITS_END(). 145 // 146 // Enum types are registered with a single IPC_ENUM_TRAITS_VALIDATE() macro. 147 // There is no need to enumerate each value to the IPC mechanism. Instead, 148 // pass an expression in terms of the parameter |value| to provide 149 // range-checking. For convenience, the IPC_ENUM_TRAITS() is provided which 150 // performs no checking, passing everything including out-of-range values. 151 // Its use is discouraged. The IPC_ENUM_TRAITS_MAX_VALUE() macro can be used 152 // for the typical case where the enum must be in the range 0..maxvalue 153 // inclusive. The IPC_ENUM_TRAITS_MIN_MAX_VALUE() macro can be used for the 154 // less typical case where the enum must be in the range minvalue..maxvalue 155 // inclusive. 156 // 157 // Do not place semicolons following these IPC_ macro invocations. There 158 // is no reason to expect that their expansion corresponds one-to-one with 159 // C++ statements. 160 // 161 // Once the types have been declared / registered, message definitions follow. 162 // "Sync" messages are just synchronous calls, the Send() call doesn't return 163 // until a reply comes back. To declare a sync message, use the IPC_SYNC_ 164 // macros. The numbers at the end show how many input/output parameters there 165 // are (i.e. 1_2 is 1 in, 2 out). Input parameters are first, followed by 166 // output parameters. The caller uses Send([route id, ], in1, &out1, &out2). 167 // The receiver's handler function will be 168 // void OnSyncMessageName(const type1& in1, type2* out1, type3* out2) 169 // 170 // A caller can also send a synchronous message, while the receiver can respond 171 // at a later time. This is transparent from the sender's side. The receiver 172 // needs to use a different handler that takes in a IPC::Message* as the output 173 // type, stash the message, and when it has the data it can Send the message. 174 // 175 // Use the IPC_MESSAGE_HANDLER_DELAY_REPLY macro instead of IPC_MESSAGE_HANDLER 176 // IPC_MESSAGE_HANDLER_DELAY_REPLY(ViewHostMsg_SyncMessageName, 177 // OnSyncMessageName) 178 // 179 // The handler function will look like: 180 // void OnSyncMessageName(const type1& in1, IPC::Message* reply_msg); 181 // 182 // Receiver stashes the IPC::Message* pointer, and when it's ready, it does: 183 // ViewHostMsg_SyncMessageName::WriteReplyParams(reply_msg, out1, out2); 184 // Send(reply_msg); 185 186 // Files that want to export their ipc messages should do 187 // #undef IPC_MESSAGE_EXPORT 188 // #define IPC_MESSAGE_EXPORT VISIBILITY_MACRO 189 // after including this header, but before using any of the macros below. 190 // (This needs to be before the include guard.) 191 #undef IPC_MESSAGE_EXPORT 192 #define IPC_MESSAGE_EXPORT 193 194 #ifndef IPC_IPC_MESSAGE_MACROS_H_ 195 #define IPC_IPC_MESSAGE_MACROS_H_ 196 197 #include "base/profiler/scoped_profile.h" 198 #include "ipc/ipc_message_utils.h" 199 #include "ipc/param_traits_macros.h" 200 201 #if defined(IPC_MESSAGE_IMPL) 202 #include "ipc/ipc_message_utils_impl.h" 203 #endif 204 205 // Convenience macro for defining structs without inheritance. Should not need 206 // to be subsequently redefined. 207 #define IPC_STRUCT_BEGIN(struct_name) \ 208 IPC_STRUCT_BEGIN_WITH_PARENT(struct_name, IPC::NoParams) 209 210 // Macros for defining structs. Will be subsequently redefined. 211 #define IPC_STRUCT_BEGIN_WITH_PARENT(struct_name, parent) \ 212 struct struct_name; \ 213 IPC_STRUCT_TRAITS_BEGIN(struct_name) \ 214 IPC_STRUCT_TRAITS_END() \ 215 struct IPC_MESSAGE_EXPORT struct_name : parent { \ 216 struct_name(); \ 217 ~struct_name(); 218 // Optional variadic parameters specify the default value for this struct 219 // member. They are passed through to the constructor for |type|. 220 #define IPC_STRUCT_MEMBER(type, name, ...) type name; 221 #define IPC_STRUCT_END() }; 222 223 // Message macros collect specific numbers of arguments and funnel them into 224 // the common message generation macro. These should never be redefined. 225 #define IPC_MESSAGE_CONTROL0(msg_class) \ 226 IPC_MESSAGE_DECL(EMPTY, CONTROL, msg_class, 0, 0, (), ()) 227 228 #define IPC_MESSAGE_CONTROL1(msg_class, type1) \ 229 IPC_MESSAGE_DECL(ASYNC, CONTROL, msg_class, 1, 0, (type1), ()) 230 231 #define IPC_MESSAGE_CONTROL2(msg_class, type1, type2) \ 232 IPC_MESSAGE_DECL(ASYNC, CONTROL, msg_class, 2, 0, (type1, type2), ()) 233 234 #define IPC_MESSAGE_CONTROL3(msg_class, type1, type2, type3) \ 235 IPC_MESSAGE_DECL(ASYNC, CONTROL, msg_class, 3, 0, (type1, type2, type3), ()) 236 237 #define IPC_MESSAGE_CONTROL4(msg_class, type1, type2, type3, type4) \ 238 IPC_MESSAGE_DECL(ASYNC, CONTROL, msg_class, 4, 0, (type1, type2, type3, type4), ()) 239 240 #define IPC_MESSAGE_CONTROL5(msg_class, type1, type2, type3, type4, type5) \ 241 IPC_MESSAGE_DECL(ASYNC, CONTROL, msg_class, 5, 0, (type1, type2, type3, type4, type5), ()) 242 243 #define IPC_MESSAGE_ROUTED0(msg_class) \ 244 IPC_MESSAGE_DECL(EMPTY, ROUTED, msg_class, 0, 0, (), ()) 245 246 #define IPC_MESSAGE_ROUTED1(msg_class, type1) \ 247 IPC_MESSAGE_DECL(ASYNC, ROUTED, msg_class, 1, 0, (type1), ()) 248 249 #define IPC_MESSAGE_ROUTED2(msg_class, type1, type2) \ 250 IPC_MESSAGE_DECL(ASYNC, ROUTED, msg_class, 2, 0, (type1, type2), ()) 251 252 #define IPC_MESSAGE_ROUTED3(msg_class, type1, type2, type3) \ 253 IPC_MESSAGE_DECL(ASYNC, ROUTED, msg_class, 3, 0, (type1, type2, type3), ()) 254 255 #define IPC_MESSAGE_ROUTED4(msg_class, type1, type2, type3, type4) \ 256 IPC_MESSAGE_DECL(ASYNC, ROUTED, msg_class, 4, 0, (type1, type2, type3, type4), ()) 257 258 #define IPC_MESSAGE_ROUTED5(msg_class, type1, type2, type3, type4, type5) \ 259 IPC_MESSAGE_DECL(ASYNC, ROUTED, msg_class, 5, 0, (type1, type2, type3, type4, type5), ()) 260 261 #define IPC_SYNC_MESSAGE_CONTROL0_0(msg_class) \ 262 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 0, 0, (), ()) 263 264 #define IPC_SYNC_MESSAGE_CONTROL0_1(msg_class, type1_out) \ 265 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 0, 1, (), (type1_out)) 266 267 #define IPC_SYNC_MESSAGE_CONTROL0_2(msg_class, type1_out, type2_out) \ 268 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 0, 2, (), (type1_out, type2_out)) 269 270 #define IPC_SYNC_MESSAGE_CONTROL0_3(msg_class, type1_out, type2_out, type3_out) \ 271 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 0, 3, (), (type1_out, type2_out, type3_out)) 272 273 #define IPC_SYNC_MESSAGE_CONTROL0_4(msg_class, type1_out, type2_out, type3_out, type4_out) \ 274 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 0, 4, (), (type1_out, type2_out, type3_out, type4_out)) 275 276 #define IPC_SYNC_MESSAGE_CONTROL1_0(msg_class, type1_in) \ 277 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 1, 0, (type1_in), ()) 278 279 #define IPC_SYNC_MESSAGE_CONTROL1_1(msg_class, type1_in, type1_out) \ 280 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 1, 1, (type1_in), (type1_out)) 281 282 #define IPC_SYNC_MESSAGE_CONTROL1_2(msg_class, type1_in, type1_out, type2_out) \ 283 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 1, 2, (type1_in), (type1_out, type2_out)) 284 285 #define IPC_SYNC_MESSAGE_CONTROL1_3(msg_class, type1_in, type1_out, type2_out, type3_out) \ 286 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 1, 3, (type1_in), (type1_out, type2_out, type3_out)) 287 288 #define IPC_SYNC_MESSAGE_CONTROL1_4(msg_class, type1_in, type1_out, type2_out, type3_out, type4_out) \ 289 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 1, 4, (type1_in), (type1_out, type2_out, type3_out, type4_out)) 290 291 #define IPC_SYNC_MESSAGE_CONTROL2_0(msg_class, type1_in, type2_in) \ 292 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 2, 0, (type1_in, type2_in), ()) 293 294 #define IPC_SYNC_MESSAGE_CONTROL2_1(msg_class, type1_in, type2_in, type1_out) \ 295 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 2, 1, (type1_in, type2_in), (type1_out)) 296 297 #define IPC_SYNC_MESSAGE_CONTROL2_2(msg_class, type1_in, type2_in, type1_out, type2_out) \ 298 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 2, 2, (type1_in, type2_in), (type1_out, type2_out)) 299 300 #define IPC_SYNC_MESSAGE_CONTROL2_3(msg_class, type1_in, type2_in, type1_out, type2_out, type3_out) \ 301 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 2, 3, (type1_in, type2_in), (type1_out, type2_out, type3_out)) 302 303 #define IPC_SYNC_MESSAGE_CONTROL2_4(msg_class, type1_in, type2_in, type1_out, type2_out, type3_out, type4_out) \ 304 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 2, 4, (type1_in, type2_in), (type1_out, type2_out, type3_out, type4_out)) 305 306 #define IPC_SYNC_MESSAGE_CONTROL3_0(msg_class, type1_in, type2_in, type3_in) \ 307 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 3, 0, (type1_in, type2_in, type3_in), ()) 308 309 #define IPC_SYNC_MESSAGE_CONTROL3_1(msg_class, type1_in, type2_in, type3_in, type1_out) \ 310 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 3, 1, (type1_in, type2_in, type3_in), (type1_out)) 311 312 #define IPC_SYNC_MESSAGE_CONTROL3_2(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out) \ 313 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 3, 2, (type1_in, type2_in, type3_in), (type1_out, type2_out)) 314 315 #define IPC_SYNC_MESSAGE_CONTROL3_3(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out, type3_out) \ 316 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 3, 3, (type1_in, type2_in, type3_in), (type1_out, type2_out, type3_out)) 317 318 #define IPC_SYNC_MESSAGE_CONTROL3_4(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out, type3_out, type4_out) \ 319 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 3, 4, (type1_in, type2_in, type3_in), (type1_out, type2_out, type3_out, type4_out)) 320 321 #define IPC_SYNC_MESSAGE_CONTROL4_0(msg_class, type1_in, type2_in, type3_in, type4_in) \ 322 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 4, 0, (type1_in, type2_in, type3_in, type4_in), ()) 323 324 #define IPC_SYNC_MESSAGE_CONTROL4_1(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out) \ 325 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 4, 1, (type1_in, type2_in, type3_in, type4_in), (type1_out)) 326 327 #define IPC_SYNC_MESSAGE_CONTROL4_2(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out) \ 328 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 4, 2, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out)) 329 330 #define IPC_SYNC_MESSAGE_CONTROL4_3(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out, type3_out) \ 331 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 4, 3, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out, type3_out)) 332 333 #define IPC_SYNC_MESSAGE_CONTROL4_4(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out, type3_out, type4_out) \ 334 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 4, 4, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out, type3_out, type4_out)) 335 336 #define IPC_SYNC_MESSAGE_CONTROL5_0(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in) \ 337 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 5, 0, (type1_in, type2_in, type3_in, type4_in, type5_in), ()) 338 339 #define IPC_SYNC_MESSAGE_CONTROL5_1(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out) \ 340 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 5, 1, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out)) 341 342 #define IPC_SYNC_MESSAGE_CONTROL5_2(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out, type2_out) \ 343 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 5, 2, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out, type2_out)) 344 345 #define IPC_SYNC_MESSAGE_CONTROL5_3(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out, type2_out, type3_out) \ 346 IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 5, 3, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out, type2_out, type3_out)) 347 348 #define IPC_SYNC_MESSAGE_ROUTED0_0(msg_class) \ 349 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 0, 0, (), ()) 350 351 #define IPC_SYNC_MESSAGE_ROUTED0_1(msg_class, type1_out) \ 352 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 0, 1, (), (type1_out)) 353 354 #define IPC_SYNC_MESSAGE_ROUTED0_2(msg_class, type1_out, type2_out) \ 355 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 0, 2, (), (type1_out, type2_out)) 356 357 #define IPC_SYNC_MESSAGE_ROUTED0_3(msg_class, type1_out, type2_out, type3_out) \ 358 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 0, 3, (), (type1_out, type2_out, type3_out)) 359 360 #define IPC_SYNC_MESSAGE_ROUTED0_4(msg_class, type1_out, type2_out, type3_out, type4_out) \ 361 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 0, 4, (), (type1_out, type2_out, type3_out, type4_out)) 362 363 #define IPC_SYNC_MESSAGE_ROUTED1_0(msg_class, type1_in) \ 364 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 1, 0, (type1_in), ()) 365 366 #define IPC_SYNC_MESSAGE_ROUTED1_1(msg_class, type1_in, type1_out) \ 367 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 1, 1, (type1_in), (type1_out)) 368 369 #define IPC_SYNC_MESSAGE_ROUTED1_2(msg_class, type1_in, type1_out, type2_out) \ 370 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 1, 2, (type1_in), (type1_out, type2_out)) 371 372 #define IPC_SYNC_MESSAGE_ROUTED1_3(msg_class, type1_in, type1_out, type2_out, type3_out) \ 373 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 1, 3, (type1_in), (type1_out, type2_out, type3_out)) 374 375 #define IPC_SYNC_MESSAGE_ROUTED1_4(msg_class, type1_in, type1_out, type2_out, type3_out, type4_out) \ 376 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 1, 4, (type1_in), (type1_out, type2_out, type3_out, type4_out)) 377 378 #define IPC_SYNC_MESSAGE_ROUTED2_0(msg_class, type1_in, type2_in) \ 379 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 2, 0, (type1_in, type2_in), ()) 380 381 #define IPC_SYNC_MESSAGE_ROUTED2_1(msg_class, type1_in, type2_in, type1_out) \ 382 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 2, 1, (type1_in, type2_in), (type1_out)) 383 384 #define IPC_SYNC_MESSAGE_ROUTED2_2(msg_class, type1_in, type2_in, type1_out, type2_out) \ 385 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 2, 2, (type1_in, type2_in), (type1_out, type2_out)) 386 387 #define IPC_SYNC_MESSAGE_ROUTED2_3(msg_class, type1_in, type2_in, type1_out, type2_out, type3_out) \ 388 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 2, 3, (type1_in, type2_in), (type1_out, type2_out, type3_out)) 389 390 #define IPC_SYNC_MESSAGE_ROUTED2_4(msg_class, type1_in, type2_in, type1_out, type2_out, type3_out, type4_out) \ 391 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 2, 4, (type1_in, type2_in), (type1_out, type2_out, type3_out, type4_out)) 392 393 #define IPC_SYNC_MESSAGE_ROUTED3_0(msg_class, type1_in, type2_in, type3_in) \ 394 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 3, 0, (type1_in, type2_in, type3_in), ()) 395 396 #define IPC_SYNC_MESSAGE_ROUTED3_1(msg_class, type1_in, type2_in, type3_in, type1_out) \ 397 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 3, 1, (type1_in, type2_in, type3_in), (type1_out)) 398 399 #define IPC_SYNC_MESSAGE_ROUTED3_2(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out) \ 400 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 3, 2, (type1_in, type2_in, type3_in), (type1_out, type2_out)) 401 402 #define IPC_SYNC_MESSAGE_ROUTED3_3(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out, type3_out) \ 403 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 3, 3, (type1_in, type2_in, type3_in), (type1_out, type2_out, type3_out)) 404 405 #define IPC_SYNC_MESSAGE_ROUTED3_4(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out, type3_out, type4_out) \ 406 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 3, 4, (type1_in, type2_in, type3_in), (type1_out, type2_out, type3_out, type4_out)) 407 408 #define IPC_SYNC_MESSAGE_ROUTED4_0(msg_class, type1_in, type2_in, type3_in, type4_in) \ 409 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 4, 0, (type1_in, type2_in, type3_in, type4_in), ()) 410 411 #define IPC_SYNC_MESSAGE_ROUTED4_1(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out) \ 412 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 4, 1, (type1_in, type2_in, type3_in, type4_in), (type1_out)) 413 414 #define IPC_SYNC_MESSAGE_ROUTED4_2(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out) \ 415 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 4, 2, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out)) 416 417 #define IPC_SYNC_MESSAGE_ROUTED4_3(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out, type3_out) \ 418 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 4, 3, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out, type3_out)) 419 420 #define IPC_SYNC_MESSAGE_ROUTED4_4(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out, type3_out, type4_out) \ 421 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 4, 4, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out, type3_out, type4_out)) 422 423 #define IPC_SYNC_MESSAGE_ROUTED5_0(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in) \ 424 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 5, 0, (type1_in, type2_in, type3_in, type4_in, type5_in), ()) 425 426 #define IPC_SYNC_MESSAGE_ROUTED5_1(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out) \ 427 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 5, 1, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out)) 428 429 #define IPC_SYNC_MESSAGE_ROUTED5_2(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out, type2_out) \ 430 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 5, 2, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out, type2_out)) 431 432 #define IPC_SYNC_MESSAGE_ROUTED5_3(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out, type2_out, type3_out) \ 433 IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 5, 3, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out, type2_out, type3_out)) 434 435 // The following macros define the common set of methods provided by ASYNC 436 // message classes. 437 #define IPC_ASYNC_MESSAGE_METHODS_GENERIC \ 438 template<class T, class S, class Method> \ 439 static bool Dispatch(const Message* msg, T* obj, S* sender, Method func) { \ 440 Schema::Param p; \ 441 if (Read(msg, &p)) { \ 442 DispatchToMethod(obj, func, p); \ 443 return true; \ 444 } \ 445 return false; \ 446 } 447 #define IPC_ASYNC_MESSAGE_METHODS_1 \ 448 IPC_ASYNC_MESSAGE_METHODS_GENERIC \ 449 template<class T, class S, typename TA> \ 450 static bool Dispatch(const Message* msg, T* obj, S* sender, \ 451 void (T::*func)(const Message&, TA)) { \ 452 Schema::Param p; \ 453 if (Read(msg, &p)) { \ 454 (obj->*func)(*msg, p.a); \ 455 return true; \ 456 } \ 457 return false; \ 458 } 459 #define IPC_ASYNC_MESSAGE_METHODS_2 \ 460 IPC_ASYNC_MESSAGE_METHODS_GENERIC \ 461 template<class T, class S, typename TA, typename TB> \ 462 static bool Dispatch(const Message* msg, T* obj, S* sender, \ 463 void (T::*func)(const Message&, TA, TB)) { \ 464 Schema::Param p; \ 465 if (Read(msg, &p)) { \ 466 (obj->*func)(*msg, p.a, p.b); \ 467 return true; \ 468 } \ 469 return false; \ 470 } \ 471 template<typename TA, typename TB> \ 472 static bool Read(const IPC::Message* msg, TA* a, TB* b) { \ 473 Schema::Param p; \ 474 if (!Read(msg, &p)) \ 475 return false; \ 476 *a = p.a; \ 477 *b = p.b; \ 478 return true; \ 479 } 480 #define IPC_ASYNC_MESSAGE_METHODS_3 \ 481 IPC_ASYNC_MESSAGE_METHODS_GENERIC \ 482 template<class T, class S, typename TA, typename TB, typename TC> \ 483 static bool Dispatch(const Message* msg, T* obj, S* sender, \ 484 void (T::*func)(const Message&, TA, TB, TC)) { \ 485 Schema::Param p; \ 486 if (Read(msg, &p)) { \ 487 (obj->*func)(*msg, p.a, p.b, p.c); \ 488 return true; \ 489 } \ 490 return false; \ 491 } \ 492 template<typename TA, typename TB, typename TC> \ 493 static bool Read(const IPC::Message* msg, TA* a, TB* b, TC* c) { \ 494 Schema::Param p; \ 495 if (!Read(msg, &p)) \ 496 return false; \ 497 *a = p.a; \ 498 *b = p.b; \ 499 *c = p.c; \ 500 return true; \ 501 } 502 #define IPC_ASYNC_MESSAGE_METHODS_4 \ 503 IPC_ASYNC_MESSAGE_METHODS_GENERIC \ 504 template<class T, class S, typename TA, typename TB, typename TC, \ 505 typename TD> \ 506 static bool Dispatch(const Message* msg, T* obj, S* sender, \ 507 void (T::*func)(const Message&, TA, TB, TC, TD)) { \ 508 Schema::Param p; \ 509 if (Read(msg, &p)) { \ 510 (obj->*func)(*msg, p.a, p.b, p.c, p.d); \ 511 return true; \ 512 } \ 513 return false; \ 514 } \ 515 template<typename TA, typename TB, typename TC, typename TD> \ 516 static bool Read(const IPC::Message* msg, TA* a, TB* b, TC* c, TD* d) { \ 517 Schema::Param p; \ 518 if (!Read(msg, &p)) \ 519 return false; \ 520 *a = p.a; \ 521 *b = p.b; \ 522 *c = p.c; \ 523 *d = p.d; \ 524 return true; \ 525 } 526 #define IPC_ASYNC_MESSAGE_METHODS_5 \ 527 IPC_ASYNC_MESSAGE_METHODS_GENERIC \ 528 template<class T, class S, typename TA, typename TB, typename TC, \ 529 typename TD, typename TE> \ 530 static bool Dispatch(const Message* msg, T* obj, S* sender, \ 531 void (T::*func)(const Message&, TA, TB, TC, TD, TE)) { \ 532 Schema::Param p; \ 533 if (Read(msg, &p)) { \ 534 (obj->*func)(*msg, p.a, p.b, p.c, p.d, p.e); \ 535 return true; \ 536 } \ 537 return false; \ 538 } \ 539 template<typename TA, typename TB, typename TC, typename TD, typename TE> \ 540 static bool Read(const IPC::Message* msg, TA* a, TB* b, TC* c, TD* d, \ 541 TE* e) { \ 542 Schema::Param p; \ 543 if (!Read(msg, &p)) \ 544 return false; \ 545 *a = p.a; \ 546 *b = p.b; \ 547 *c = p.c; \ 548 *d = p.d; \ 549 *e = p.e; \ 550 return true; \ 551 } 552 553 // The following macros define the common set of methods provided by SYNC 554 // message classes. 555 #define IPC_SYNC_MESSAGE_METHODS_GENERIC \ 556 template<class T, class S, class Method> \ 557 static bool Dispatch(const Message* msg, T* obj, S* sender, Method func) { \ 558 Schema::SendParam send_params; \ 559 bool ok = ReadSendParam(msg, &send_params); \ 560 return Schema::DispatchWithSendParams(ok, send_params, msg, obj, sender, \ 561 func); \ 562 } \ 563 template<class T, class Method> \ 564 static bool DispatchDelayReply(const Message* msg, T* obj, Method func) { \ 565 Schema::SendParam send_params; \ 566 bool ok = ReadSendParam(msg, &send_params); \ 567 return Schema::DispatchDelayReplyWithSendParams(ok, send_params, msg, \ 568 obj, func); \ 569 } 570 #define IPC_SYNC_MESSAGE_METHODS_0 \ 571 IPC_SYNC_MESSAGE_METHODS_GENERIC 572 #define IPC_SYNC_MESSAGE_METHODS_1 \ 573 IPC_SYNC_MESSAGE_METHODS_GENERIC \ 574 template<typename TA> \ 575 static void WriteReplyParams(Message* reply, TA a) { \ 576 Schema::WriteReplyParams(reply, a); \ 577 } 578 #define IPC_SYNC_MESSAGE_METHODS_2 \ 579 IPC_SYNC_MESSAGE_METHODS_GENERIC \ 580 template<typename TA, typename TB> \ 581 static void WriteReplyParams(Message* reply, TA a, TB b) { \ 582 Schema::WriteReplyParams(reply, a, b); \ 583 } 584 #define IPC_SYNC_MESSAGE_METHODS_3 \ 585 IPC_SYNC_MESSAGE_METHODS_GENERIC \ 586 template<typename TA, typename TB, typename TC> \ 587 static void WriteReplyParams(Message* reply, TA a, TB b, TC c) { \ 588 Schema::WriteReplyParams(reply, a, b, c); \ 589 } 590 #define IPC_SYNC_MESSAGE_METHODS_4 \ 591 IPC_SYNC_MESSAGE_METHODS_GENERIC \ 592 template<typename TA, typename TB, typename TC, typename TD> \ 593 static void WriteReplyParams(Message* reply, TA a, TB b, TC c, TD d) { \ 594 Schema::WriteReplyParams(reply, a, b, c, d); \ 595 } 596 #define IPC_SYNC_MESSAGE_METHODS_5 \ 597 IPC_SYNC_MESSAGE_METHODS_GENERIC \ 598 template<typename TA, typename TB, typename TC, typename TD, typename TE> \ 599 static void WriteReplyParams(Message* reply, TA a, TB b, TC c, TD d, TE e) { \ 600 Schema::WriteReplyParams(reply, a, b, c, d, e); \ 601 } 602 603 // Common message macro which dispatches into one of the 6 (sync x kind) 604 // routines. There is a way that these 6 cases can be lumped together, 605 // but the macros get very complicated in that case. 606 // Note: intended be redefined to generate other information. 607 #define IPC_MESSAGE_DECL(sync, kind, msg_class, \ 608 in_cnt, out_cnt, in_list, out_list) \ 609 IPC_##sync##_##kind##_DECL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 610 IPC_MESSAGE_EXTRA(sync, kind, msg_class, in_cnt, out_cnt, in_list, out_list) 611 612 #define IPC_EMPTY_CONTROL_DECL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 613 class IPC_MESSAGE_EXPORT msg_class : public IPC::Message { \ 614 public: \ 615 typedef IPC::Message Schema; \ 616 enum { ID = IPC_MESSAGE_ID() }; \ 617 msg_class() : IPC::Message(MSG_ROUTING_CONTROL, ID, PRIORITY_NORMAL) {} \ 618 static void Log(std::string* name, const Message* msg, std::string* l); \ 619 }; 620 621 #define IPC_EMPTY_ROUTED_DECL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 622 class IPC_MESSAGE_EXPORT msg_class : public IPC::Message { \ 623 public: \ 624 typedef IPC::Message Schema; \ 625 enum { ID = IPC_MESSAGE_ID() }; \ 626 msg_class(int32 routing_id) \ 627 : IPC::Message(routing_id, ID, PRIORITY_NORMAL) {} \ 628 static void Log(std::string* name, const Message* msg, std::string* l); \ 629 }; 630 631 #define IPC_ASYNC_CONTROL_DECL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 632 class IPC_MESSAGE_EXPORT msg_class : public IPC::Message { \ 633 public: \ 634 typedef IPC::MessageSchema<IPC_TUPLE_IN_##in_cnt in_list> Schema; \ 635 typedef Schema::Param Param; \ 636 enum { ID = IPC_MESSAGE_ID() }; \ 637 msg_class(IPC_TYPE_IN_##in_cnt in_list); \ 638 virtual ~msg_class(); \ 639 static bool Read(const Message* msg, Schema::Param* p); \ 640 static void Log(std::string* name, const Message* msg, std::string* l); \ 641 IPC_ASYNC_MESSAGE_METHODS_##in_cnt \ 642 }; 643 644 #define IPC_ASYNC_ROUTED_DECL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 645 class IPC_MESSAGE_EXPORT msg_class : public IPC::Message { \ 646 public: \ 647 typedef IPC::MessageSchema<IPC_TUPLE_IN_##in_cnt in_list> Schema; \ 648 typedef Schema::Param Param; \ 649 enum { ID = IPC_MESSAGE_ID() }; \ 650 msg_class(int32 routing_id IPC_COMMA_##in_cnt \ 651 IPC_TYPE_IN_##in_cnt in_list); \ 652 virtual ~msg_class(); \ 653 static bool Read(const Message* msg, Schema::Param* p); \ 654 static void Log(std::string* name, const Message* msg, std::string* l); \ 655 IPC_ASYNC_MESSAGE_METHODS_##in_cnt \ 656 }; 657 658 #define IPC_SYNC_CONTROL_DECL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 659 class IPC_MESSAGE_EXPORT msg_class : public IPC::SyncMessage { \ 660 public: \ 661 typedef IPC::SyncMessageSchema<IPC_TUPLE_IN_##in_cnt in_list, \ 662 IPC_TUPLE_OUT_##out_cnt out_list> Schema; \ 663 typedef Schema::ReplyParam ReplyParam; \ 664 typedef Schema::SendParam SendParam; \ 665 enum { ID = IPC_MESSAGE_ID() }; \ 666 msg_class(IPC_TYPE_IN_##in_cnt in_list \ 667 IPC_COMMA_AND_##in_cnt(IPC_COMMA_##out_cnt) \ 668 IPC_TYPE_OUT_##out_cnt out_list); \ 669 virtual ~msg_class(); \ 670 static bool ReadSendParam(const Message* msg, Schema::SendParam* p); \ 671 static bool ReadReplyParam( \ 672 const Message* msg, \ 673 TupleTypes<ReplyParam>::ValueTuple* p); \ 674 static void Log(std::string* name, const Message* msg, std::string* l); \ 675 IPC_SYNC_MESSAGE_METHODS_##out_cnt \ 676 }; 677 678 #define IPC_SYNC_ROUTED_DECL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 679 class IPC_MESSAGE_EXPORT msg_class : public IPC::SyncMessage { \ 680 public: \ 681 typedef IPC::SyncMessageSchema<IPC_TUPLE_IN_##in_cnt in_list, \ 682 IPC_TUPLE_OUT_##out_cnt out_list> Schema; \ 683 typedef Schema::ReplyParam ReplyParam; \ 684 typedef Schema::SendParam SendParam; \ 685 enum { ID = IPC_MESSAGE_ID() }; \ 686 msg_class(int32 routing_id \ 687 IPC_COMMA_OR_##in_cnt(IPC_COMMA_##out_cnt) \ 688 IPC_TYPE_IN_##in_cnt in_list \ 689 IPC_COMMA_AND_##in_cnt(IPC_COMMA_##out_cnt) \ 690 IPC_TYPE_OUT_##out_cnt out_list); \ 691 virtual ~msg_class(); \ 692 static bool ReadSendParam(const Message* msg, Schema::SendParam* p); \ 693 static bool ReadReplyParam( \ 694 const Message* msg, \ 695 TupleTypes<ReplyParam>::ValueTuple* p); \ 696 static void Log(std::string* name, const Message* msg, std::string* l); \ 697 IPC_SYNC_MESSAGE_METHODS_##out_cnt \ 698 }; 699 700 #if defined(IPC_MESSAGE_IMPL) 701 702 // "Implementation" inclusion produces constructors, destructors, and 703 // logging functions, except for the no-arg special cases, where the 704 // implementation occurs in the declaration, and there is no special 705 // logging function. 706 #define IPC_MESSAGE_EXTRA(sync, kind, msg_class, \ 707 in_cnt, out_cnt, in_list, out_list) \ 708 IPC_##sync##_##kind##_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 709 IPC_##sync##_MESSAGE_LOG(msg_class) 710 711 #define IPC_EMPTY_CONTROL_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list) 712 #define IPC_EMPTY_ROUTED_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list) 713 714 #define IPC_ASYNC_CONTROL_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 715 msg_class::msg_class(IPC_TYPE_IN_##in_cnt in_list) : \ 716 IPC::Message(MSG_ROUTING_CONTROL, ID, PRIORITY_NORMAL) { \ 717 Schema::Write(this, IPC_NAME_IN_##in_cnt in_list); \ 718 } \ 719 msg_class::~msg_class() {} \ 720 bool msg_class::Read(const Message* msg, Schema::Param* p) { \ 721 return Schema::Read(msg, p); \ 722 } 723 724 #define IPC_ASYNC_ROUTED_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 725 msg_class::msg_class(int32 routing_id IPC_COMMA_##in_cnt \ 726 IPC_TYPE_IN_##in_cnt in_list) : \ 727 IPC::Message(routing_id, ID, PRIORITY_NORMAL) { \ 728 Schema::Write(this, IPC_NAME_IN_##in_cnt in_list); \ 729 } \ 730 msg_class::~msg_class() {} \ 731 bool msg_class::Read(const Message* msg, Schema::Param* p) { \ 732 return Schema::Read(msg, p); \ 733 } 734 735 #define IPC_SYNC_CONTROL_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 736 msg_class::msg_class(IPC_TYPE_IN_##in_cnt in_list \ 737 IPC_COMMA_AND_##in_cnt(IPC_COMMA_##out_cnt) \ 738 IPC_TYPE_OUT_##out_cnt out_list) : \ 739 IPC::SyncMessage(MSG_ROUTING_CONTROL, ID, PRIORITY_NORMAL, \ 740 new IPC::ParamDeserializer<Schema::ReplyParam>( \ 741 IPC_NAME_OUT_##out_cnt out_list)) { \ 742 Schema::Write(this, IPC_NAME_IN_##in_cnt in_list); \ 743 } \ 744 msg_class::~msg_class() {} \ 745 bool msg_class::ReadSendParam(const Message* msg, Schema::SendParam* p) { \ 746 return Schema::ReadSendParam(msg, p); \ 747 } \ 748 bool msg_class::ReadReplyParam(const Message* msg, \ 749 TupleTypes<ReplyParam>::ValueTuple* p) { \ 750 return Schema::ReadReplyParam(msg, p); \ 751 } 752 753 #define IPC_SYNC_ROUTED_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list) \ 754 msg_class::msg_class(int32 routing_id \ 755 IPC_COMMA_OR_##in_cnt(IPC_COMMA_##out_cnt) \ 756 IPC_TYPE_IN_##in_cnt in_list \ 757 IPC_COMMA_AND_##in_cnt(IPC_COMMA_##out_cnt) \ 758 IPC_TYPE_OUT_##out_cnt out_list) : \ 759 IPC::SyncMessage(routing_id, ID, PRIORITY_NORMAL, \ 760 new IPC::ParamDeserializer<Schema::ReplyParam>( \ 761 IPC_NAME_OUT_##out_cnt out_list)) { \ 762 Schema::Write(this, IPC_NAME_IN_##in_cnt in_list); \ 763 } \ 764 msg_class::~msg_class() {} \ 765 bool msg_class::ReadSendParam(const Message* msg, Schema::SendParam* p) { \ 766 return Schema::ReadSendParam(msg, p); \ 767 } \ 768 bool msg_class::ReadReplyParam(const Message* msg, \ 769 TupleTypes<ReplyParam>::ValueTuple* p) { \ 770 return Schema::ReadReplyParam(msg, p); \ 771 } 772 773 #define IPC_EMPTY_MESSAGE_LOG(msg_class) \ 774 void msg_class::Log(std::string* name, \ 775 const Message* msg, \ 776 std::string* l) { \ 777 if (name) \ 778 *name = #msg_class; \ 779 } 780 781 #define IPC_ASYNC_MESSAGE_LOG(msg_class) \ 782 void msg_class::Log(std::string* name, \ 783 const Message* msg, \ 784 std::string* l) { \ 785 if (name) \ 786 *name = #msg_class; \ 787 if (!msg || !l) \ 788 return; \ 789 Schema::Param p; \ 790 if (Schema::Read(msg, &p)) \ 791 IPC::LogParam(p, l); \ 792 } 793 794 #define IPC_SYNC_MESSAGE_LOG(msg_class) \ 795 void msg_class::Log(std::string* name, \ 796 const Message* msg, \ 797 std::string* l) { \ 798 if (name) \ 799 *name = #msg_class; \ 800 if (!msg || !l) \ 801 return; \ 802 if (msg->is_sync()) { \ 803 TupleTypes<Schema::SendParam>::ValueTuple p; \ 804 if (Schema::ReadSendParam(msg, &p)) \ 805 IPC::LogParam(p, l); \ 806 AddOutputParamsToLog(msg, l); \ 807 } else { \ 808 TupleTypes<Schema::ReplyParam>::ValueTuple p; \ 809 if (Schema::ReadReplyParam(msg, &p)) \ 810 IPC::LogParam(p, l); \ 811 } \ 812 } 813 814 #elif defined(IPC_MESSAGE_MACROS_LOG_ENABLED) 815 816 #ifndef IPC_LOG_TABLE_ADD_ENTRY 817 #error You need to define IPC_LOG_TABLE_ADD_ENTRY(msg_id, logger) 818 #endif 819 820 // "Log table" inclusion produces extra logging registration code. 821 #define IPC_MESSAGE_EXTRA(sync, kind, msg_class, \ 822 in_cnt, out_cnt, in_list, out_list) \ 823 class LoggerRegisterHelper##msg_class { \ 824 public: \ 825 LoggerRegisterHelper##msg_class() { \ 826 const uint32 msg_id = static_cast<uint32>(msg_class::ID); \ 827 IPC_LOG_TABLE_ADD_ENTRY(msg_id, msg_class::Log); \ 828 } \ 829 }; \ 830 LoggerRegisterHelper##msg_class g_LoggerRegisterHelper##msg_class; 831 832 #else 833 834 // Normal inclusion produces nothing extra. 835 #define IPC_MESSAGE_EXTRA(sync, kind, msg_class, \ 836 in_cnt, out_cnt, in_list, out_list) 837 838 #endif // defined(IPC_MESSAGE_IMPL) 839 840 // Handle variable sized argument lists. These are usually invoked by token 841 // pasting against the argument counts. 842 #define IPC_TYPE_IN_0() 843 #define IPC_TYPE_IN_1(t1) const t1& arg1 844 #define IPC_TYPE_IN_2(t1, t2) const t1& arg1, const t2& arg2 845 #define IPC_TYPE_IN_3(t1, t2, t3) const t1& arg1, const t2& arg2, const t3& arg3 846 #define IPC_TYPE_IN_4(t1, t2, t3, t4) const t1& arg1, const t2& arg2, const t3& arg3, const t4& arg4 847 #define IPC_TYPE_IN_5(t1, t2, t3, t4, t5) const t1& arg1, const t2& arg2, const t3& arg3, const t4& arg4, const t5& arg5 848 849 #define IPC_TYPE_OUT_0() 850 #define IPC_TYPE_OUT_1(t1) t1* arg6 851 #define IPC_TYPE_OUT_2(t1, t2) t1* arg6, t2* arg7 852 #define IPC_TYPE_OUT_3(t1, t2, t3) t1* arg6, t2* arg7, t3* arg8 853 #define IPC_TYPE_OUT_4(t1, t2, t3, t4) t1* arg6, t2* arg7, t3* arg8, t4* arg9 854 855 #define IPC_TUPLE_IN_0() Tuple0 856 #define IPC_TUPLE_IN_1(t1) Tuple1<t1> 857 #define IPC_TUPLE_IN_2(t1, t2) Tuple2<t1, t2> 858 #define IPC_TUPLE_IN_3(t1, t2, t3) Tuple3<t1, t2, t3> 859 #define IPC_TUPLE_IN_4(t1, t2, t3, t4) Tuple4<t1, t2, t3, t4> 860 #define IPC_TUPLE_IN_5(t1, t2, t3, t4, t5) Tuple5<t1, t2, t3, t4, t5> 861 862 #define IPC_TUPLE_OUT_0() Tuple0 863 #define IPC_TUPLE_OUT_1(t1) Tuple1<t1&> 864 #define IPC_TUPLE_OUT_2(t1, t2) Tuple2<t1&, t2&> 865 #define IPC_TUPLE_OUT_3(t1, t2, t3) Tuple3<t1&, t2&, t3&> 866 #define IPC_TUPLE_OUT_4(t1, t2, t3, t4) Tuple4<t1&, t2&, t3&, t4&> 867 868 #define IPC_NAME_IN_0() MakeTuple() 869 #define IPC_NAME_IN_1(t1) MakeRefTuple(arg1) 870 #define IPC_NAME_IN_2(t1, t2) MakeRefTuple(arg1, arg2) 871 #define IPC_NAME_IN_3(t1, t2, t3) MakeRefTuple(arg1, arg2, arg3) 872 #define IPC_NAME_IN_4(t1, t2, t3, t4) MakeRefTuple(arg1, arg2, arg3, arg4) 873 #define IPC_NAME_IN_5(t1, t2, t3, t4, t5) MakeRefTuple(arg1, arg2, arg3, arg4, arg5) 874 875 #define IPC_NAME_OUT_0() MakeTuple() 876 #define IPC_NAME_OUT_1(t1) MakeRefTuple(*arg6) 877 #define IPC_NAME_OUT_2(t1, t2) MakeRefTuple(*arg6, *arg7) 878 #define IPC_NAME_OUT_3(t1, t2, t3) MakeRefTuple(*arg6, *arg7, *arg8) 879 #define IPC_NAME_OUT_4(t1, t2, t3, t4) MakeRefTuple(*arg6, *arg7, *arg8, *arg9) 880 881 // There are places where the syntax requires a comma if there are input args, 882 // if there are input args and output args, or if there are input args or 883 // output args. These macros allow generation of the comma as needed; invoke 884 // by token pasting against the argument counts. 885 #define IPC_COMMA_0 886 #define IPC_COMMA_1 , 887 #define IPC_COMMA_2 , 888 #define IPC_COMMA_3 , 889 #define IPC_COMMA_4 , 890 #define IPC_COMMA_5 , 891 892 #define IPC_COMMA_AND_0(x) 893 #define IPC_COMMA_AND_1(x) x 894 #define IPC_COMMA_AND_2(x) x 895 #define IPC_COMMA_AND_3(x) x 896 #define IPC_COMMA_AND_4(x) x 897 #define IPC_COMMA_AND_5(x) x 898 899 #define IPC_COMMA_OR_0(x) x 900 #define IPC_COMMA_OR_1(x) , 901 #define IPC_COMMA_OR_2(x) , 902 #define IPC_COMMA_OR_3(x) , 903 #define IPC_COMMA_OR_4(x) , 904 #define IPC_COMMA_OR_5(x) , 905 906 // Message IDs 907 // Note: we currently use __LINE__ to give unique IDs to messages within 908 // a file. They're globally unique since each file defines its own 909 // IPC_MESSAGE_START. 910 #define IPC_MESSAGE_ID() ((IPC_MESSAGE_START << 16) + __LINE__) 911 #define IPC_MESSAGE_ID_CLASS(id) ((id) >> 16) 912 #define IPC_MESSAGE_ID_LINE(id) ((id) & 0xffff) 913 914 // Message crackers and handlers. 915 // Prefer to use the IPC_BEGIN_MESSAGE_MAP_EX to the older macros since they 916 // allow you to detect when a message could not be de-serialized. Usage: 917 // 918 // bool MyClass::OnMessageReceived(const IPC::Message& msg) { 919 // bool handled = true; 920 // bool msg_is_good = false; 921 // IPC_BEGIN_MESSAGE_MAP_EX(MyClass, msg, msg_is_good) 922 // IPC_MESSAGE_HANDLER(MsgClassOne, OnMsgClassOne) 923 // ...more handlers here ... 924 // IPC_MESSAGE_HANDLER(MsgClassTen, OnMsgClassTen) 925 // IPC_MESSAGE_UNHANDLED(handled = false) 926 // IPC_END_MESSAGE_MAP_EX() 927 // if (!msg_is_good) { 928 // // Signal error here or terminate offending process. 929 // } 930 // return handled; 931 // } 932 933 934 #define IPC_BEGIN_MESSAGE_MAP_EX(class_name, msg, msg_is_ok) \ 935 { \ 936 typedef class_name _IpcMessageHandlerClass; \ 937 const IPC::Message& ipc_message__ = msg; \ 938 bool& msg_is_ok__ = msg_is_ok; \ 939 switch (ipc_message__.type()) { \ 940 941 #define IPC_BEGIN_MESSAGE_MAP(class_name, msg) \ 942 { \ 943 typedef class_name _IpcMessageHandlerClass; \ 944 const IPC::Message& ipc_message__ = msg; \ 945 bool msg_is_ok__ = true; \ 946 switch (ipc_message__.type()) { \ 947 948 #define IPC_MESSAGE_FORWARD(msg_class, obj, member_func) \ 949 case msg_class::ID: { \ 950 TRACK_RUN_IN_IPC_HANDLER(member_func); \ 951 msg_is_ok__ = msg_class::Dispatch(&ipc_message__, obj, this, \ 952 &member_func); \ 953 } \ 954 break; 955 956 #define IPC_MESSAGE_HANDLER(msg_class, member_func) \ 957 IPC_MESSAGE_FORWARD(msg_class, this, _IpcMessageHandlerClass::member_func) 958 959 #define IPC_MESSAGE_FORWARD_DELAY_REPLY(msg_class, obj, member_func) \ 960 case msg_class::ID: { \ 961 TRACK_RUN_IN_IPC_HANDLER(member_func); \ 962 msg_is_ok__ = msg_class::DispatchDelayReply(&ipc_message__, obj, \ 963 &member_func); \ 964 } \ 965 break; 966 967 #define IPC_MESSAGE_HANDLER_DELAY_REPLY(msg_class, member_func) \ 968 IPC_MESSAGE_FORWARD_DELAY_REPLY(msg_class, this, \ 969 _IpcMessageHandlerClass::member_func) 970 971 // TODO(jar): fix chrome frame to always supply |code| argument. 972 #define IPC_MESSAGE_HANDLER_GENERIC(msg_class, code) \ 973 case msg_class::ID: { \ 974 /* TRACK_RUN_IN_IPC_HANDLER(code); TODO(jar) */ \ 975 code; \ 976 } \ 977 break; 978 979 #define IPC_REPLY_HANDLER(func) \ 980 case IPC_REPLY_ID: { \ 981 TRACK_RUN_IN_IPC_HANDLER(func); \ 982 func(ipc_message__); \ 983 } \ 984 break; 985 986 987 #define IPC_MESSAGE_UNHANDLED(code) \ 988 default: { \ 989 code; \ 990 } \ 991 break; 992 993 #define IPC_MESSAGE_UNHANDLED_ERROR() \ 994 IPC_MESSAGE_UNHANDLED(NOTREACHED() << \ 995 "Invalid message with type = " << \ 996 ipc_message__.type()) 997 998 #define IPC_END_MESSAGE_MAP() \ 999 } \ 1000 DCHECK(msg_is_ok__); \ 1001 } 1002 1003 #define IPC_END_MESSAGE_MAP_EX() \ 1004 } \ 1005 } 1006 1007 // This corresponds to an enum value from IPCMessageStart. 1008 #define IPC_MESSAGE_CLASS(message) \ 1009 IPC_MESSAGE_ID_CLASS(message.type()) 1010 1011 #endif // IPC_IPC_MESSAGE_MACROS_H_ 1012 1013 // The following #ifdef cannot be removed. Although the code is semantically 1014 // equivalent without the #ifdef, VS2013 contains a bug where it is 1015 // over-aggressive in optimizing out #includes. Putting the #ifdef is a 1016 // workaround for this bug. See http://goo.gl/eGt2Fb for more details. 1017 // This can be removed once VS2013 is fixed. 1018 #ifdef IPC_MESSAGE_START 1019 // Clean up IPC_MESSAGE_START in this unguarded section so that the 1020 // XXX_messages.h files need not do so themselves. This makes the 1021 // XXX_messages.h files easier to write. 1022 #undef IPC_MESSAGE_START 1023 #endif 1024
