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// Copyright (c) 2012 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 TOOLS_ANDROID_FORWARDER2_HOST_CONTROLLER_H_
#define TOOLS_ANDROID_FORWARDER2_HOST_CONTROLLER_H_
#include <string>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "base/threading/thread.h"
#include "tools/android/forwarder2/pipe_notifier.h"
#include "tools/android/forwarder2/socket.h"
namespace forwarder2 {
// This class partners with DeviceController and has the same lifetime and
// threading characteristics as DeviceListener. In a nutshell, this class
// operates on its own thread and is destroyed on the thread it was constructed
// on. The class' deletion can happen in two different ways:
// - Its destructor was called by its owner (HostControllersManager).
// - Its internal thread requested self-deletion after an error happened. In
// this case the owner (HostControllersManager) is notified on the
// construction thread through the provided DeletionCallback invoked with the
// HostController instance. When this callback is invoked, it's up to the
// owner to delete the instance.
class HostController {
public:
// Callback used for self-deletion that lets the client perform some cleanup
// work before deleting the HostController instance.
typedef base::Callback<void (scoped_ptr<HostController>)> DeletionCallback;
// If |device_port| is zero then a dynamic port is allocated (and retrievable
// through device_port() below).
static scoped_ptr<HostController> Create(
int device_port,
int host_port,
int adb_port,
int exit_notifier_fd,
const DeletionCallback& deletion_callback);
~HostController();
// Starts the internal controller thread.
void Start();
int adb_port() const { return adb_port_; }
int device_port() const { return device_port_; }
private:
HostController(int device_port,
int host_port,
int adb_port,
int exit_notifier_fd,
const DeletionCallback& deletion_callback,
scoped_ptr<Socket> adb_control_socket,
scoped_ptr<PipeNotifier> delete_controller_notifier);
void ReadNextCommandSoon();
void ReadCommandOnInternalThread();
void StartForwarder(scoped_ptr<Socket> host_server_data_socket);
// Helper method that creates a socket and adds the appropriate event file
// descriptors.
scoped_ptr<Socket> CreateSocket();
void SelfDelete();
static void SelfDeleteOnDeletionTaskRunner(
const DeletionCallback& deletion_callback,
scoped_ptr<HostController> controller);
const int device_port_;
const int host_port_;
const int adb_port_;
// Used to notify the controller when the process is killed.
const int global_exit_notifier_fd_;
// Used to let the client delete the instance in case an error happened.
const DeletionCallback deletion_callback_;
scoped_ptr<Socket> adb_control_socket_;
scoped_ptr<PipeNotifier> delete_controller_notifier_;
// Used to cancel the pending blocking IO operations when the host controller
// instance is deleted.
// Task runner used for deletion set at construction time (i.e. the object is
// deleted on the same thread it is created on).
const scoped_refptr<base::SingleThreadTaskRunner> deletion_task_runner_;
base::Thread thread_;
DISALLOW_COPY_AND_ASSIGN(HostController);
};
} // namespace forwarder2
#endif // TOOLS_ANDROID_FORWARDER2_HOST_CONTROLLER_H_
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