Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame^] | 1 | #ifndef ANDROID_PDX_RPC_REMOTE_METHOD_H_ |
| 2 | #define ANDROID_PDX_RPC_REMOTE_METHOD_H_ |
| 3 | |
| 4 | #include <tuple> |
| 5 | #include <type_traits> |
| 6 | |
| 7 | #include <pdx/client.h> |
| 8 | #include <pdx/rpc/argument_encoder.h> |
| 9 | #include <pdx/rpc/message_buffer.h> |
| 10 | #include <pdx/rpc/payload.h> |
| 11 | #include <pdx/rpc/remote_method_type.h> |
| 12 | #include <pdx/service.h> |
| 13 | |
| 14 | namespace android { |
| 15 | namespace pdx { |
| 16 | namespace rpc { |
| 17 | |
| 18 | #ifdef __clang__ |
| 19 | // Stand-in type to avoid Clang compiler bug. Clang currently has a bug where |
| 20 | // performing parameter pack expansion for arguments with empty packs causes a |
| 21 | // compiler crash. Provide a substitute void type and specializations/overloads |
| 22 | // of CheckArgumentTypes and DispatchRemoteMethod to work around this problem. |
| 23 | struct Void {}; |
| 24 | |
| 25 | // Evaluates to true if the method type is <any>(Void), false otherwise. |
| 26 | template <typename RemoteMethodType> |
| 27 | using IsVoidMethod = typename std::integral_constant< |
| 28 | bool, |
| 29 | RemoteMethodType::Traits::Arity == 1 && |
| 30 | std::is_same<typename RemoteMethodType::Traits::template Arg<0>, |
| 31 | Void>::value>; |
| 32 | |
| 33 | // Utility to determine if a method is of type <any>(Void). |
| 34 | template <typename RemoteMethodType> |
| 35 | using EnableIfVoidMethod = |
| 36 | typename std::enable_if<IsVoidMethod<RemoteMethodType>::value>::type; |
| 37 | |
| 38 | // Utility to determine if a method is not of type <any>(Void). |
| 39 | template <typename RemoteMethodType> |
| 40 | using EnableIfNotVoidMethod = |
| 41 | typename std::enable_if<!IsVoidMethod<RemoteMethodType>::value>::type; |
| 42 | |
| 43 | #else |
| 44 | // GCC works fine with void argument types, always enable the regular |
| 45 | // implementation of DispatchRemoteMethod. |
| 46 | using Void = void; |
| 47 | template <typename RemoteMethodType> |
| 48 | using EnableIfVoidMethod = void; |
| 49 | template <typename RemoteMethodType> |
| 50 | using EnableIfNotVoidMethod = void; |
| 51 | #endif |
| 52 | |
| 53 | // Helper type trait to specialize InvokeRemoteMethods for return types that |
| 54 | // can be obtained directly from Transaction::Send<T>() without deserializing |
| 55 | // reply payload. |
| 56 | template <typename T> |
| 57 | struct IsDirectReturn : std::false_type {}; |
| 58 | |
| 59 | template <> |
| 60 | struct IsDirectReturn<void> : std::true_type {}; |
| 61 | |
| 62 | template <> |
| 63 | struct IsDirectReturn<int> : std::true_type {}; |
| 64 | |
| 65 | template <> |
| 66 | struct IsDirectReturn<LocalHandle> : std::true_type {}; |
| 67 | |
| 68 | template <> |
| 69 | struct IsDirectReturn<LocalChannelHandle> : std::true_type {}; |
| 70 | |
| 71 | template <typename Return, typename Type = void> |
| 72 | using EnableIfDirectReturn = |
| 73 | typename std::enable_if<IsDirectReturn<Return>::value, Type>::type; |
| 74 | |
| 75 | template <typename Return, typename Type = void> |
| 76 | using EnableIfNotDirectReturn = |
| 77 | typename std::enable_if<!IsDirectReturn<Return>::value, Type>::type; |
| 78 | |
| 79 | // Utility class to invoke a method with arguments packed in a tuple. |
| 80 | template <typename Class, typename T> |
| 81 | class UnpackArguments; |
| 82 | |
| 83 | // Utility class to invoke a method with arguments packed in a tuple. |
| 84 | template <typename Class, typename Return, typename... Args> |
| 85 | class UnpackArguments<Class, Return(Args...)> { |
| 86 | public: |
| 87 | using ArgsTupleType = std::tuple<typename std::decay<Args>::type...>; |
| 88 | using MethodType = Return (Class::*)(Message&, Args...); |
| 89 | |
| 90 | UnpackArguments(Class& instance, MethodType method, Message& message, |
| 91 | ArgsTupleType& parameters) |
| 92 | : instance_(instance), |
| 93 | method_(method), |
| 94 | message_(message), |
| 95 | parameters_(parameters) {} |
| 96 | |
| 97 | // Invokes method_ on intance_ with the packed arguments from parameters_. |
| 98 | Return Invoke() { |
| 99 | constexpr auto Arity = sizeof...(Args); |
| 100 | return static_cast<Return>(InvokeHelper(MakeIndexSequence<Arity>{})); |
| 101 | } |
| 102 | |
| 103 | private: |
| 104 | Class& instance_; |
| 105 | MethodType method_; |
| 106 | Message& message_; |
| 107 | ArgsTupleType& parameters_; |
| 108 | |
| 109 | template <std::size_t... Index> |
| 110 | Return InvokeHelper(IndexSequence<Index...>) { |
| 111 | return static_cast<Return>((instance_.*method_)( |
| 112 | message_, |
| 113 | std::get<Index>(std::forward<ArgsTupleType>(parameters_))...)); |
| 114 | } |
| 115 | |
| 116 | UnpackArguments(const UnpackArguments&) = delete; |
| 117 | void operator=(const UnpackArguments&) = delete; |
| 118 | }; |
| 119 | |
| 120 | // Returns an error code from a remote method to the client. May be called |
| 121 | // either during dispatch of the remote method handler or at a later time if the |
| 122 | // message is moved for delayed response. |
| 123 | inline void RemoteMethodError(Message& message, int error_code) { |
| 124 | const int ret = message.ReplyError(error_code); |
| 125 | ALOGE_IF(ret < 0, "RemoteMethodError: Failed to reply to message: %s", |
| 126 | strerror(-ret)); |
| 127 | } |
| 128 | |
| 129 | // Returns a value from a remote method to the client. The usual method to |
| 130 | // return a value during dispatch of a remote method is to simply use a return |
| 131 | // statement in the handler. If the message is moved however, these methods may |
| 132 | // be used to return a value at a later time, outside of initial dispatch. |
| 133 | |
| 134 | // Overload for direct return types. |
| 135 | template <typename RemoteMethodType, typename Return> |
| 136 | EnableIfDirectReturn<typename RemoteMethodType::Return> RemoteMethodReturn( |
| 137 | Message& message, const Return& return_value) { |
| 138 | const int ret = message.Reply(return_value); |
| 139 | ALOGE_IF(ret < 0, "RemoteMethodReturn: Failed to reply to message: %s", |
| 140 | strerror(-ret)); |
| 141 | } |
| 142 | |
| 143 | // Overload for non-direct return types. |
| 144 | template <typename RemoteMethodType, typename Return> |
| 145 | EnableIfNotDirectReturn<typename RemoteMethodType::Return> RemoteMethodReturn( |
| 146 | Message& message, const Return& return_value) { |
| 147 | using Signature = typename RemoteMethodType::template RewriteReturn<Return>; |
| 148 | rpc::ServicePayload<ReplyBuffer> payload(message); |
| 149 | MakeArgumentEncoder<Signature>(&payload).EncodeReturn(return_value); |
| 150 | |
| 151 | int ret; |
| 152 | auto size = message.Write(payload.Data(), payload.Size()); |
| 153 | if (size < static_cast<decltype(size)>(payload.Size())) |
| 154 | ret = message.ReplyError(EIO); |
| 155 | else |
| 156 | ret = message.Reply(0); |
| 157 | ALOGE_IF(ret < 0, "RemoteMethodReturn: Failed to reply to message: %s", |
| 158 | strerror(-ret)); |
| 159 | } |
| 160 | |
| 161 | // Dispatches a method by deserializing arguments from the given Message, with |
| 162 | // compile-time interface check. Overload for void return types. |
| 163 | template <typename RemoteMethodType, typename Class, typename... Args, |
| 164 | typename = EnableIfNotVoidMethod<RemoteMethodType>> |
| 165 | void DispatchRemoteMethod(Class& instance, |
| 166 | void (Class::*method)(Message&, Args...), |
| 167 | Message& message, |
| 168 | std::size_t max_capacity = InitialBufferCapacity) { |
| 169 | using Signature = typename RemoteMethodType::template RewriteArgs<Args...>; |
| 170 | rpc::ServicePayload<ReceiveBuffer> payload(message); |
| 171 | payload.Resize(max_capacity); |
| 172 | |
| 173 | auto size = message.Read(payload.Data(), payload.Size()); |
| 174 | if (size < 0) { |
| 175 | RemoteMethodError(message, -size); |
| 176 | return; |
| 177 | } |
| 178 | |
| 179 | payload.Resize(size); |
| 180 | |
| 181 | ErrorType error; |
| 182 | auto decoder = MakeArgumentDecoder<Signature>(&payload); |
| 183 | auto arguments = decoder.DecodeArguments(&error); |
| 184 | if (error) { |
| 185 | RemoteMethodError(message, EIO); |
| 186 | return; |
| 187 | } |
| 188 | |
| 189 | UnpackArguments<Class, Signature>(instance, method, message, arguments) |
| 190 | .Invoke(); |
| 191 | // Return to the caller unless the message was moved. |
| 192 | if (message) |
| 193 | RemoteMethodReturn<RemoteMethodType>(message, 0); |
| 194 | } |
| 195 | |
| 196 | // Dispatches a method by deserializing arguments from the given Message, with |
| 197 | // compile-time interface check. Overload for int return types. |
| 198 | template <typename RemoteMethodType, typename Class, typename... Args, |
| 199 | typename = EnableIfNotVoidMethod<RemoteMethodType>> |
| 200 | void DispatchRemoteMethod(Class& instance, |
| 201 | int (Class::*method)(Message&, Args...), |
| 202 | Message& message, |
| 203 | std::size_t max_capacity = InitialBufferCapacity) { |
| 204 | using Signature = typename RemoteMethodType::template RewriteArgs<Args...>; |
| 205 | rpc::ServicePayload<ReceiveBuffer> payload(message); |
| 206 | payload.Resize(max_capacity); |
| 207 | |
| 208 | auto size = message.Read(payload.Data(), payload.Size()); |
| 209 | if (size < 0) { |
| 210 | RemoteMethodError(message, -size); |
| 211 | return; |
| 212 | } |
| 213 | |
| 214 | payload.Resize(size); |
| 215 | |
| 216 | ErrorType error; |
| 217 | auto decoder = MakeArgumentDecoder<Signature>(&payload); |
| 218 | auto arguments = decoder.DecodeArguments(&error); |
| 219 | if (error) { |
| 220 | RemoteMethodError(message, EIO); |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | auto return_value = |
| 225 | UnpackArguments<Class, Signature>(instance, method, message, arguments) |
| 226 | .Invoke(); |
| 227 | // Return the value to the caller unless the message was moved. |
| 228 | if (message) |
| 229 | RemoteMethodReturn<RemoteMethodType>(message, return_value); |
| 230 | } |
| 231 | |
| 232 | // Dispatches a method by deserializing arguments from the given Message, with |
| 233 | // compile-time interface check. Overload for FileHandle return types. |
| 234 | template <typename RemoteMethodType, FileHandleMode Mode, typename Class, |
| 235 | typename... Args, typename = EnableIfNotVoidMethod<RemoteMethodType>> |
| 236 | void DispatchRemoteMethod(Class& instance, |
| 237 | FileHandle<Mode> (Class::*method)(Message&, Args...), |
| 238 | Message& message, |
| 239 | std::size_t max_capacity = InitialBufferCapacity) { |
| 240 | using Signature = |
| 241 | typename RemoteMethodType::template RewriteSignature<FileHandle<Mode>, |
| 242 | Args...>; |
| 243 | rpc::ServicePayload<ReceiveBuffer> payload(message); |
| 244 | payload.Resize(max_capacity); |
| 245 | |
| 246 | auto size = message.Read(payload.Data(), payload.Size()); |
| 247 | if (size < 0) { |
| 248 | RemoteMethodError(message, -size); |
| 249 | return; |
| 250 | } |
| 251 | |
| 252 | payload.Resize(size); |
| 253 | |
| 254 | ErrorType error; |
| 255 | auto decoder = MakeArgumentDecoder<Signature>(&payload); |
| 256 | auto arguments = decoder.DecodeArguments(&error); |
| 257 | if (error) { |
| 258 | RemoteMethodError(message, EIO); |
| 259 | return; |
| 260 | } |
| 261 | |
| 262 | auto return_value = |
| 263 | UnpackArguments<Class, Signature>(instance, method, message, arguments) |
| 264 | .Invoke(); |
| 265 | // Return the value to the caller unless the message was moved. |
| 266 | if (message) |
| 267 | RemoteMethodReturn<RemoteMethodType>(message, return_value); |
| 268 | } |
| 269 | |
| 270 | // Dispatches a method by deserializing arguments from the given Message, with |
| 271 | // compile-time interface check. Overload for ChannelHandle return types. |
| 272 | template <typename RemoteMethodType, ChannelHandleMode Mode, typename Class, |
| 273 | typename... Args, typename = EnableIfNotVoidMethod<RemoteMethodType>> |
| 274 | void DispatchRemoteMethod( |
| 275 | Class& instance, ChannelHandle<Mode> (Class::*method)(Message&, Args...), |
| 276 | Message& message, std::size_t max_capacity = InitialBufferCapacity) { |
| 277 | using Signature = typename RemoteMethodType::template RewriteArgs<Args...>; |
| 278 | rpc::ServicePayload<ReceiveBuffer> payload(message); |
| 279 | payload.Resize(max_capacity); |
| 280 | |
| 281 | auto size = message.Read(payload.Data(), payload.Size()); |
| 282 | if (size < 0) { |
| 283 | RemoteMethodError(message, -size); |
| 284 | return; |
| 285 | } |
| 286 | |
| 287 | payload.Resize(size); |
| 288 | |
| 289 | ErrorType error; |
| 290 | auto decoder = MakeArgumentDecoder<Signature>(&payload); |
| 291 | auto arguments = decoder.DecodeArguments(&error); |
| 292 | if (error) { |
| 293 | RemoteMethodError(message, EIO); |
| 294 | return; |
| 295 | } |
| 296 | |
| 297 | auto return_value = |
| 298 | UnpackArguments<Class, Signature>(instance, method, message, arguments) |
| 299 | .Invoke(); |
| 300 | // Return the value to the caller unless the message was moved. |
| 301 | if (message) |
| 302 | RemoteMethodReturn<RemoteMethodType>(message, return_value); |
| 303 | } |
| 304 | |
| 305 | // Dispatches a method by deserializing arguments from the given Message, with |
| 306 | // compile-time interface signature check. Overload for generic return types. |
| 307 | template <typename RemoteMethodType, typename Class, typename Return, |
| 308 | typename... Args, typename = EnableIfNotVoidMethod<RemoteMethodType>> |
| 309 | void DispatchRemoteMethod(Class& instance, |
| 310 | Return (Class::*method)(Message&, Args...), |
| 311 | Message& message, |
| 312 | std::size_t max_capacity = InitialBufferCapacity) { |
| 313 | using Signature = |
| 314 | typename RemoteMethodType::template RewriteSignature<Return, Args...>; |
| 315 | rpc::ServicePayload<ReceiveBuffer> payload(message); |
| 316 | payload.Resize(max_capacity); |
| 317 | |
| 318 | auto size = message.Read(payload.Data(), payload.Size()); |
| 319 | if (size < 0) { |
| 320 | RemoteMethodError(message, -size); |
| 321 | return; |
| 322 | } |
| 323 | |
| 324 | payload.Resize(size); |
| 325 | |
| 326 | ErrorType error; |
| 327 | auto decoder = MakeArgumentDecoder<Signature>(&payload); |
| 328 | auto arguments = decoder.DecodeArguments(&error); |
| 329 | if (error) { |
| 330 | RemoteMethodError(message, EIO); |
| 331 | return; |
| 332 | } |
| 333 | |
| 334 | auto return_value = |
| 335 | UnpackArguments<Class, Signature>(instance, method, message, arguments) |
| 336 | .Invoke(); |
| 337 | // Return the value to the caller unless the message was moved. |
| 338 | if (message) |
| 339 | RemoteMethodReturn<RemoteMethodType>(message, return_value); |
| 340 | } |
| 341 | |
| 342 | #ifdef __clang__ |
| 343 | // Overloads to handle Void argument type without exploding clang. |
| 344 | |
| 345 | // Overload for void return type. |
| 346 | template <typename RemoteMethodType, typename Class, |
| 347 | typename = EnableIfVoidMethod<RemoteMethodType>> |
| 348 | void DispatchRemoteMethod(Class& instance, void (Class::*method)(Message&), |
| 349 | Message& message) { |
| 350 | (instance.*method)(message); |
| 351 | // Return to the caller unless the message was moved. |
| 352 | if (message) |
| 353 | RemoteMethodReturn<RemoteMethodType>(message, 0); |
| 354 | } |
| 355 | |
| 356 | // Overload for int return type. |
| 357 | template <typename RemoteMethodType, typename Class, |
| 358 | typename = EnableIfVoidMethod<RemoteMethodType>> |
| 359 | void DispatchRemoteMethod(Class& instance, int (Class::*method)(Message&), |
| 360 | Message& message) { |
| 361 | const int return_value = (instance.*method)(message); |
| 362 | // Return the value to the caller unless the message was moved. |
| 363 | if (message) |
| 364 | RemoteMethodReturn<RemoteMethodType>(message, return_value); |
| 365 | } |
| 366 | |
| 367 | // Overload for FileHandle return type. |
| 368 | template <typename RemoteMethodType, typename Class, FileHandleMode Mode, |
| 369 | typename = EnableIfVoidMethod<RemoteMethodType>> |
| 370 | void DispatchRemoteMethod(Class& instance, |
| 371 | FileHandle<Mode> (Class::*method)(Message&), |
| 372 | Message& message) { |
| 373 | FileHandle<Mode> return_value = (instance.*method)(message); |
| 374 | // Return the value to the caller unless the message was moved. |
| 375 | if (message) |
| 376 | RemoteMethodReturn<RemoteMethodType>(message, return_value); |
| 377 | } |
| 378 | |
| 379 | // Overload for ChannelHandle return types. |
| 380 | template <typename RemoteMethodType, typename Class, ChannelHandleMode Mode, |
| 381 | typename = EnableIfVoidMethod<RemoteMethodType>> |
| 382 | void DispatchRemoteMethod(Class& instance, |
| 383 | ChannelHandle<Mode> (Class::*method)(Message&), |
| 384 | Message& message) { |
| 385 | ChannelHandle<Mode> return_value = (instance.*method)(message); |
| 386 | // Return the value to the caller unless the message was moved. |
| 387 | if (message) |
| 388 | RemoteMethodReturn<RemoteMethodType>(message, return_value); |
| 389 | } |
| 390 | |
| 391 | // Overload for generic return type. |
| 392 | template <typename RemoteMethodType, typename Class, typename Return, |
| 393 | typename = EnableIfVoidMethod<RemoteMethodType>> |
| 394 | void DispatchRemoteMethod(Class& instance, Return (Class::*method)(Message&), |
| 395 | Message& message) { |
| 396 | auto return_value = (instance.*method)(message); |
| 397 | // Return the value to the caller unless the message was moved. |
| 398 | if (message) |
| 399 | RemoteMethodReturn<RemoteMethodType>(message, return_value); |
| 400 | } |
| 401 | #endif |
| 402 | |
| 403 | } // namespace rpc |
| 404 | |
| 405 | // Definitions for template methods declared in pdx/client.h. |
| 406 | |
| 407 | template <int Opcode, typename T> |
| 408 | struct CheckArgumentTypes; |
| 409 | |
| 410 | template <int Opcode, typename Return, typename... Args> |
| 411 | struct CheckArgumentTypes<Opcode, Return(Args...)> { |
| 412 | template <typename R> |
| 413 | static typename rpc::EnableIfDirectReturn<R, Status<R>> Invoke(Client& client, |
| 414 | Args... args) { |
| 415 | Transaction trans{client}; |
| 416 | rpc::ClientPayload<rpc::SendBuffer> payload{trans}; |
| 417 | rpc::MakeArgumentEncoder<Return(Args...)>(&payload).EncodeArguments( |
| 418 | std::forward<Args>(args)...); |
| 419 | return trans.Send<R>(Opcode, payload.Data(), payload.Size(), nullptr, 0); |
| 420 | } |
| 421 | |
| 422 | template <typename R> |
| 423 | static typename rpc::EnableIfNotDirectReturn<R, Status<R>> Invoke( |
| 424 | Client& client, Args... args) { |
| 425 | Transaction trans{client}; |
| 426 | |
| 427 | rpc::ClientPayload<rpc::SendBuffer> send_payload{trans}; |
| 428 | rpc::MakeArgumentEncoder<Return(Args...)>(&send_payload) |
| 429 | .EncodeArguments(std::forward<Args>(args)...); |
| 430 | |
| 431 | rpc::ClientPayload<rpc::ReplyBuffer> reply_payload{trans}; |
| 432 | reply_payload.Resize(reply_payload.Capacity()); |
| 433 | |
| 434 | Status<R> result; |
| 435 | auto status = |
| 436 | trans.Send<void>(Opcode, send_payload.Data(), send_payload.Size(), |
| 437 | reply_payload.Data(), reply_payload.Size()); |
| 438 | if (!status) { |
| 439 | result.SetError(status.error()); |
| 440 | } else { |
| 441 | R return_value; |
| 442 | rpc::ErrorType error = |
| 443 | rpc::MakeArgumentDecoder<Return(Args...)>(&reply_payload) |
| 444 | .DecodeReturn(&return_value); |
| 445 | |
| 446 | switch (error.error_code()) { |
| 447 | case rpc::ErrorCode::NO_ERROR: |
| 448 | result.SetValue(std::move(return_value)); |
| 449 | break; |
| 450 | |
| 451 | // This error is returned when ArrayWrapper/StringWrapper is too |
| 452 | // small to receive the payload. |
| 453 | case rpc::ErrorCode::INSUFFICIENT_DESTINATION_SIZE: |
| 454 | result.SetError(ENOBUFS); |
| 455 | break; |
| 456 | |
| 457 | default: |
| 458 | result.SetError(EIO); |
| 459 | break; |
| 460 | } |
| 461 | } |
| 462 | return result; |
| 463 | } |
| 464 | |
| 465 | template <typename R> |
| 466 | static typename rpc::EnableIfDirectReturn<R, Status<void>> InvokeInPlace( |
| 467 | Client& client, R* return_value, Args... args) { |
| 468 | Transaction trans{client}; |
| 469 | |
| 470 | rpc::ClientPayload<rpc::SendBuffer> send_payload{trans}; |
| 471 | rpc::MakeArgumentEncoder<Return(Args...)>(&send_payload) |
| 472 | .EncodeArguments(std::forward<Args>(args)...); |
| 473 | |
| 474 | Status<void> result; |
| 475 | auto status = trans.Send<R>(Opcode, send_payload.Data(), |
| 476 | send_payload.Size(), nullptr, 0); |
| 477 | if (status) { |
| 478 | *return_value = status.take(); |
| 479 | result.SetValue(); |
| 480 | } else { |
| 481 | result.SetError(status.error()); |
| 482 | } |
| 483 | return result; |
| 484 | } |
| 485 | |
| 486 | template <typename R> |
| 487 | static typename rpc::EnableIfNotDirectReturn<R, Status<void>> InvokeInPlace( |
| 488 | Client& client, R* return_value, Args... args) { |
| 489 | Transaction trans{client}; |
| 490 | |
| 491 | rpc::ClientPayload<rpc::SendBuffer> send_payload{trans}; |
| 492 | rpc::MakeArgumentEncoder<Return(Args...)>(&send_payload) |
| 493 | .EncodeArguments(std::forward<Args>(args)...); |
| 494 | |
| 495 | rpc::ClientPayload<rpc::ReplyBuffer> reply_payload{trans}; |
| 496 | reply_payload.Resize(reply_payload.Capacity()); |
| 497 | |
| 498 | auto result = |
| 499 | trans.Send<void>(Opcode, send_payload.Data(), send_payload.Size(), |
| 500 | reply_payload.Data(), reply_payload.Size()); |
| 501 | if (result) { |
| 502 | rpc::ErrorType error = |
| 503 | rpc::MakeArgumentDecoder<Return(Args...)>(&reply_payload) |
| 504 | .DecodeReturn(return_value); |
| 505 | |
| 506 | switch (error.error_code()) { |
| 507 | case rpc::ErrorCode::NO_ERROR: |
| 508 | result.SetValue(); |
| 509 | break; |
| 510 | |
| 511 | // This error is returned when ArrayWrapper/StringWrapper is too |
| 512 | // small to receive the payload. |
| 513 | case rpc::ErrorCode::INSUFFICIENT_DESTINATION_SIZE: |
| 514 | result.SetError(ENOBUFS); |
| 515 | break; |
| 516 | |
| 517 | default: |
| 518 | result.SetError(EIO); |
| 519 | break; |
| 520 | } |
| 521 | } |
| 522 | return result; |
| 523 | } |
| 524 | }; |
| 525 | |
| 526 | // Invokes the remote method with opcode and signature described by |
| 527 | // |RemoteMethodType|. |
| 528 | template <typename RemoteMethodType, typename... Args> |
| 529 | Status<typename RemoteMethodType::Return> Client::InvokeRemoteMethod( |
| 530 | Args&&... args) { |
| 531 | return CheckArgumentTypes< |
| 532 | RemoteMethodType::Opcode, |
| 533 | typename RemoteMethodType::template RewriteArgs<Args...>>:: |
| 534 | template Invoke<typename RemoteMethodType::Return>( |
| 535 | *this, std::forward<Args>(args)...); |
| 536 | } |
| 537 | |
| 538 | template <typename RemoteMethodType, typename Return, typename... Args> |
| 539 | Status<void> Client::InvokeRemoteMethodInPlace(Return* return_value, |
| 540 | Args&&... args) { |
| 541 | return CheckArgumentTypes< |
| 542 | RemoteMethodType::Opcode, |
| 543 | typename RemoteMethodType::template RewriteSignature<Return, Args...>>:: |
| 544 | template InvokeInPlace(*this, return_value, std::forward<Args>(args)...); |
| 545 | } |
| 546 | |
| 547 | } // namespace pdx |
| 548 | } // namespace android |
| 549 | |
| 550 | #endif // ANDROID_PDX_RPC_REMOTE_METHOD_H_ |