mojo/edk/system/broker_host.h

// 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_HOST_H_
#define MOJO_EDK_SYSTEM_BROKER_HOST_H_

#include "base/macros.h"
#include "base/message_loop/message_loop.h"
#include "mojo/edk/embedder/scoped_platform_handle.h"
#include "mojo/edk/system/channel.h"

namespace mojo {
namespace edk {

// The BrokerHost is a channel to the child process, which services synchronous
// IPCs.
class BrokerHost : public Channel::Delegate,
                   public base::MessageLoop::DestructionObserver {
 public:
  explicit BrokerHost(ScopedPlatformHandle platform_handle);

  // Send |handle| to the child, to be used to establish a NodeChannel to us.
  void SendChannel(ScopedPlatformHandle handle);

 private:
  ~BrokerHost() override;

  // Channel::Delegate:
  void OnChannelMessage(const void* payload,
                        size_t payload_size,
                        ScopedPlatformHandleVectorPtr handles) override;
  void OnChannelError() override;

  // base::MessageLoop::DestructionObserver:
  void WillDestroyCurrentMessageLoop() override;

  void OnBufferRequest(size_t num_bytes);

  scoped_refptr<Channel> channel_;

  DISALLOW_COPY_AND_ASSIGN(BrokerHost);
};

}  // namespace edk
}  // namespace mojo

#endif  // MOJO_EDK_SYSTEM_BROKER_HOST_H_