1 // Copyright 2016 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_MESSAGE_LIB_MESSAGE_BUFFER_H_ 6 #define MOJO_PUBLIC_CPP_BINDINGS_MESSAGE_LIB_MESSAGE_BUFFER_H_ 7 8 #include <stdint.h> 9 10 #include <utility> 11 12 #include "base/macros.h" 13 #include "mojo/public/cpp/bindings/lib/buffer.h" 14 #include "mojo/public/cpp/system/message.h" 15 16 namespace mojo { 17 namespace internal { 18 19 // A fixed-size Buffer using a Mojo message object for storage. 20 class MessageBuffer : public Buffer { 21 public: 22 // Initializes this buffer to carry a fixed byte capacity and no handles. 23 MessageBuffer(size_t capacity, bool zero_initialized); 24 25 // Initializes this buffer from an existing Mojo MessageHandle. 26 MessageBuffer(ScopedMessageHandle message, uint32_t num_bytes); 27 28 ~MessageBuffer(); 29 TakeMessage()30 ScopedMessageHandle TakeMessage() { return std::move(message_); } 31 32 void NotifyBadMessage(const std::string& error); 33 34 private: 35 ScopedMessageHandle message_; 36 37 DISALLOW_COPY_AND_ASSIGN(MessageBuffer); 38 }; 39 40 } // namespace internal 41 } // namespace mojo 42 43 #endif // MOJO_PUBLIC_CPP_BINDINGS_MESSAGE_LIB_MESSAGE_BUFFER_H_ 44