1 // Copyright 2014 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 #ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_INTERNAL_H_ 6 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_INTERNAL_H_ 7 8 #include <stdint.h> 9 10 #include <string> 11 12 #include "base/callback.h" 13 #include "base/macros.h" 14 #include "mojo/public/cpp/bindings/bindings_export.h" 15 #include "mojo/public/cpp/bindings/lib/bindings_internal.h" 16 17 namespace mojo { 18 19 class Message; 20 21 namespace internal { 22 23 template <typename T> 24 class Array_Data; 25 26 #pragma pack(push, 1) 27 28 struct MessageHeader : internal::StructHeader { 29 // Interface ID for identifying multiple interfaces running on the same 30 // message pipe. 31 uint32_t interface_id; 32 // Message name, which is scoped to the interface that the message belongs to. 33 uint32_t name; 34 // 0 or either of the enum values defined above. 35 uint32_t flags; 36 // Unused padding to make the struct size a multiple of 8 bytes. 37 uint32_t padding; 38 }; 39 static_assert(sizeof(MessageHeader) == 24, "Bad sizeof(MessageHeader)"); 40 41 struct MessageHeaderV1 : MessageHeader { 42 // Only used if either kFlagExpectsResponse or kFlagIsResponse is set in 43 // order to match responses with corresponding requests. 44 uint64_t request_id; 45 }; 46 static_assert(sizeof(MessageHeaderV1) == 32, "Bad sizeof(MessageHeaderV1)"); 47 48 struct MessageHeaderV2 : MessageHeaderV1 { 49 MessageHeaderV2(); 50 GenericPointer payload; 51 Pointer<Array_Data<uint32_t>> payload_interface_ids; 52 }; 53 static_assert(sizeof(MessageHeaderV2) == 48, "Bad sizeof(MessageHeaderV2)"); 54 55 #pragma pack(pop) 56 57 class MOJO_CPP_BINDINGS_EXPORT MessageDispatchContext { 58 public: 59 explicit MessageDispatchContext(Message* message); 60 ~MessageDispatchContext(); 61 62 static MessageDispatchContext* current(); 63 64 const base::Callback<void(const std::string&)>& GetBadMessageCallback(); 65 66 private: 67 MessageDispatchContext* outer_context_; 68 Message* message_; 69 base::Callback<void(const std::string&)> bad_message_callback_; 70 71 DISALLOW_COPY_AND_ASSIGN(MessageDispatchContext); 72 }; 73 74 class MOJO_CPP_BINDINGS_EXPORT SyncMessageResponseSetup { 75 public: 76 static void SetCurrentSyncResponseMessage(Message* message); 77 }; 78 79 } // namespace internal 80 } // namespace mojo 81 82 #endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_INTERNAL_H_ 83
