gecko-dev/ipc/netd/Netd.h

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_system_netd_h__
#define mozilla_system_netd_h__

#include "nsISupportsImpl.h"
#include "nsAutoPtr.h"
#include "base/message_loop.h"
#include "mozilla/FileUtils.h"

#define MAX_COMMAND_SIZE  4096

namespace mozilla {
namespace ipc {

/*
 * Represents raw data going to or coming from the Netd socket.
 */
struct NetdCommand
{
  uint8_t mData[MAX_COMMAND_SIZE];

  // Number of octets in mData.
  size_t mSize;
};

class NetdConsumer
{
protected:
  virtual ~NetdConsumer() { }

public:
  NS_INLINE_DECL_REFCOUNTING(NetdConsumer)

  virtual void MessageReceived(NetdCommand* aMessage) = 0;
};

class NetdWriteTask : public Runnable
{
  NS_IMETHOD Run();
};

class NetdClient : public MessageLoopForIO::LineWatcher
{
  virtual ~NetdClient();

public:
  NS_INLINE_DECL_REFCOUNTING(NetdClient)
  typedef std::queue<NetdCommand*> NetdCommandQueue;

  NetdClient();
  static void Start();
  static void SendNetdCommandIOThread(NetdCommand* aMessage);

private:
  void WriteNetdCommand();
  virtual void OnError();
  virtual void OnLineRead(int aFd, nsDependentCSubstring& aMessage);
  virtual void OnFileCanWriteWithoutBlocking(int aFd);
  bool OpenSocket();

  MessageLoopForIO *mIOLoop;
  MessageLoopForIO::FileDescriptorWatcher mReadWatcher;
  MessageLoopForIO::FileDescriptorWatcher mWriteWatcher;
  ScopedClose mSocket;
  NetdCommandQueue mOutgoingQ;
  nsAutoPtr<NetdCommand> mCurrentNetdCommand;
  size_t mCurrentWriteOffset;
  size_t mReConnectTimes;
};

void StartNetd(NetdConsumer *);
void StopNetd();
void SendNetdCommand(NetdCommand *);

} // namespace ipc
} // namespace mozilla

#endif  // mozilla_system_netd_h__