mojo/public/cpp/bindings/lib/message_builder.h

   1 // Copyright 2013 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_BUILDER_H_
   6 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_BUILDER_H_
   7
   8 #include <stdint.h>
   9
  10 #include "mojo/public/cpp/bindings/lib/fixed_buffer.h"
  11 #include "mojo/public/cpp/bindings/lib/message_internal.h"
  12
  13 namespace mojo {
  14 class Message;
  15
  16 namespace internal {
  17
  18 class MessageBuilder {
  19  public:
  20   MessageBuilder(uint32_t name, size_t payload_size);
  21   ~MessageBuilder();
  22
  23   Buffer* buffer() { return &buf_; }
  24
  25   // Call Finish when done making allocations in |buffer()|. Upon return,
  26   // |message| will contain the message data, and |buffer()| will no longer be
  27   // valid to reference.
  28   void Finish(Message* message);
  29
  30  protected:
  31   explicit MessageBuilder(size_t size);
  32   FixedBuffer buf_;
  33
  34   MOJO_DISALLOW_COPY_AND_ASSIGN(MessageBuilder);
  35 };
  36
  37 class MessageWithRequestIDBuilder : public MessageBuilder {
  38  public:
  39   MessageWithRequestIDBuilder(uint32_t name, size_t payload_size,
  40                               uint32_t flags, uint64_t request_id);
  41 };
  42
  43 class RequestMessageBuilder : public MessageWithRequestIDBuilder {
  44  public:
  45   RequestMessageBuilder(uint32_t name, size_t payload_size)
  46       : MessageWithRequestIDBuilder(name, payload_size, kMessageExpectsResponse,
  47                                     0) {
  48   }
  49 };
  50
  51 class ResponseMessageBuilder : public MessageWithRequestIDBuilder {
  52  public:
  53   ResponseMessageBuilder(uint32_t name, size_t payload_size,
  54                          uint64_t request_id)
  55       : MessageWithRequestIDBuilder(name, payload_size, kMessageIsResponse,
  56                                     request_id) {
  57   }
  58 };
  59
  60 }  // namespace internal
  61 }  // namespace mojo
  62
  63 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_BUILDER_H_