| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MOJO_EDK_SYSTEM_BROKER_MESSAGES_H_ |
| #define MOJO_EDK_SYSTEM_BROKER_MESSAGES_H_ |
| |
| #include "mojo/edk/system/channel.h" |
| |
| namespace mojo { |
| namespace edk { |
| |
| #pragma pack(push, 1) |
| |
| enum BrokerMessageType : uint32_t { |
| INIT, |
| BUFFER_REQUEST, |
| BUFFER_RESPONSE, |
| }; |
| |
| struct BrokerMessageHeader { |
| BrokerMessageType type; |
| uint32_t padding; |
| }; |
| |
| static_assert(sizeof(BrokerMessageHeader) % kChannelMessageAlignment == 0, |
| "Invalid header size."); |
| |
| struct BufferRequestData { |
| uint32_t size; |
| }; |
| |
| #pragma pack(pop) |
| |
| template <typename T> |
| inline Channel::MessagePtr CreateBrokerMessage(BrokerMessageType type, |
| size_t num_handles, |
| T** out_message_data) { |
| const size_t message_size = sizeof(BrokerMessageHeader) + sizeof(T); |
| Channel::MessagePtr message(new Channel::Message(message_size, num_handles)); |
| BrokerMessageHeader* header = |
| reinterpret_cast<BrokerMessageHeader*>(message->mutable_payload()); |
| header->type = type; |
| header->padding = 0; |
| *out_message_data = reinterpret_cast<T*>(header + 1); |
| return message; |
| } |
| |
| inline Channel::MessagePtr CreateBrokerMessage( |
| BrokerMessageType type, |
| size_t num_handles, |
| std::nullptr_t** dummy_out_data) { |
| Channel::MessagePtr message( |
| new Channel::Message(sizeof(BrokerMessageHeader), num_handles)); |
| BrokerMessageHeader* header = |
| reinterpret_cast<BrokerMessageHeader*>(message->mutable_payload()); |
| header->type = type; |
| header->padding = 0; |
| return message; |
| } |
| |
| } // namespace edk |
| } // namespace mojo |
| |
| #endif // MOJO_EDK_SYSTEM_BROKER_MESSAGES_H_ |