1// Copyright (c) 2012 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 CHROMEOS_PROCESS_PROXY_PROCESS_PROXY_REGISTRY_H_
6#define CHROMEOS_PROCESS_PROXY_PROCESS_PROXY_REGISTRY_H_
7
8#include <map>
9
10#include "base/callback.h"
11#include "base/lazy_instance.h"
12#include "base/memory/scoped_ptr.h"
13#include "base/memory/ref_counted.h"
14#include "base/threading/non_thread_safe.h"
15#include "base/threading/thread.h"
16#include "chromeos/chromeos_export.h"
17#include "chromeos/process_proxy/process_proxy.h"
18
19namespace chromeos {
20
21typedef base::Callback<void(pid_t, const std::string&, const std::string&)>
22      ProcessOutputCallbackWithPid;
23
24// Keeps track of all created ProcessProxies. It is created lazily and should
25// live on a single thread (where all methods must be called).
26class CHROMEOS_EXPORT ProcessProxyRegistry : public base::NonThreadSafe {
27 public:
28  // Info we need about a ProcessProxy instance.
29  struct ProcessProxyInfo {
30    scoped_refptr<ProcessProxy> proxy;
31    scoped_ptr<base::Thread> watcher_thread;
32    ProcessOutputCallbackWithPid callback;
33    pid_t process_id;
34
35    ProcessProxyInfo();
36    // This is to make map::insert happy, we don't init anything.
37    ProcessProxyInfo(const ProcessProxyInfo& other);
38    ~ProcessProxyInfo();
39  };
40
41  static ProcessProxyRegistry* Get();
42
43  // Starts new ProcessProxy (which starts new process).
44  bool OpenProcess(const std::string& command, pid_t* pid,
45                   const ProcessOutputCallbackWithPid& callback);
46  // Sends data to the process with id |pid|.
47  bool SendInput(pid_t pid, const std::string& data);
48  // Stops the process with id |pid|.
49  bool CloseProcess(pid_t pid);
50  // Reports terminal resize to process proxy.
51  bool OnTerminalResize(pid_t pid, int width, int height);
52
53  // Currently used for testing.
54  void SetOutputCallback(const ProcessOutputCallback& callback);
55
56 private:
57  friend struct ::base::DefaultLazyInstanceTraits<ProcessProxyRegistry>;
58
59  ProcessProxyRegistry();
60  ~ProcessProxyRegistry();
61
62  // Gets called when output gets detected.
63  void OnProcessOutput(pid_t pid,
64                       ProcessOutputType type,
65                       const std::string& data);
66
67  // Map of all existing ProcessProxies.
68  std::map<pid_t, ProcessProxyInfo> proxy_map_;
69
70  DISALLOW_COPY_AND_ASSIGN(ProcessProxyRegistry);
71};
72
73}  // namespace chromeos
74
75#endif  // CHROMEOS_PROCESS_PROXY_PROCESS_PROXY_REGISTRY_H_
76