content/browser/browser_child_process_host_impl.h

   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 CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_
   6 #define CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_
   7
   8 #include <list>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/process/process.h"
  13 #include "base/synchronization/waitable_event_watcher.h"
  14 #include "content/browser/child_process_launcher.h"
  15 #include "content/browser/power_monitor_message_broadcaster.h"
  16 #include "content/public/browser/browser_child_process_host.h"
  17 #include "content/public/browser/child_process_data.h"
  18 #include "content/public/common/child_process_host_delegate.h"
  19
  20 namespace base {
  21 class CommandLine;
  22 }
  23
  24 namespace content {
  25
  26 class BrowserChildProcessHostIterator;
  27 class BrowserChildProcessObserver;
  28 class BrowserMessageFilter;
  29
  30 // Plugins/workers and other child processes that live on the IO thread use this
  31 // class. RenderProcessHostImpl is the main exception that doesn't use this
  32 /// class because it lives on the UI thread.
  33 class CONTENT_EXPORT BrowserChildProcessHostImpl
  34     : public BrowserChildProcessHost,
  35       public NON_EXPORTED_BASE(ChildProcessHostDelegate),
  36       public ChildProcessLauncher::Client {
  37  public:
  38   BrowserChildProcessHostImpl(
  39       int process_type,
  40       BrowserChildProcessHostDelegate* delegate);
  41   virtual ~BrowserChildProcessHostImpl();
  42
  43   // Terminates all child processes and deletes each BrowserChildProcessHost
  44   // instance.
  45   static void TerminateAll();
  46
  47   // BrowserChildProcessHost implementation:
  48   virtual bool Send(IPC::Message* message) OVERRIDE;
  49   virtual void Launch(
  50       SandboxedProcessLauncherDelegate* delegate,
  51       base::CommandLine* cmd_line) OVERRIDE;
  52   virtual const ChildProcessData& GetData() const OVERRIDE;
  53   virtual ChildProcessHost* GetHost() const OVERRIDE;
  54   virtual base::TerminationStatus GetTerminationStatus(
  55       bool known_dead, int* exit_code) OVERRIDE;
  56   virtual void SetName(const base::string16& name) OVERRIDE;
  57   virtual void SetHandle(base::ProcessHandle handle) OVERRIDE;
  58
  59   // ChildProcessHostDelegate implementation:
  60   virtual bool CanShutdown() OVERRIDE;
  61   virtual void OnChildDisconnected() OVERRIDE;
  62   virtual base::ProcessHandle GetHandle() const OVERRIDE;
  63   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  64   virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
  65   virtual void OnChannelError() OVERRIDE;
  66   virtual void OnBadMessageReceived(const IPC::Message& message) OVERRIDE;
  67
  68   // Removes this host from the host list. Calls ChildProcessHost::ForceShutdown
  69   void ForceShutdown();
  70
  71   // Callers can reduce the BrowserChildProcess' priority.
  72   void SetBackgrounded(bool backgrounded);
  73
  74   // Controls whether the child process should be terminated on browser
  75   // shutdown. Default is to always terminate.
  76   void SetTerminateChildOnShutdown(bool terminate_on_shutdown);
  77
  78   // Adds an IPC message filter.
  79   void AddFilter(BrowserMessageFilter* filter);
  80
  81   // Called when an instance of a particular child is created in a page.
  82   static void NotifyProcessInstanceCreated(const ChildProcessData& data);
  83
  84   static void HistogramBadMessageTerminated(int process_type);
  85
  86   BrowserChildProcessHostDelegate* delegate() const { return delegate_; }
  87
  88   typedef std::list<BrowserChildProcessHostImpl*> BrowserChildProcessList;
  89  private:
  90   friend class BrowserChildProcessHostIterator;
  91   friend class BrowserChildProcessObserver;
  92
  93   static BrowserChildProcessList* GetIterator();
  94
  95   static void AddObserver(BrowserChildProcessObserver* observer);
  96   static void RemoveObserver(BrowserChildProcessObserver* observer);
  97
  98   // ChildProcessLauncher::Client implementation.
  99   virtual void OnProcessLaunched() OVERRIDE;
 100   virtual void OnProcessLaunchFailed() OVERRIDE;
 101
 102 #if defined(OS_WIN)
 103   void DeleteProcessWaitableEvent(base::WaitableEvent* event);
 104   void OnProcessExitedEarly(base::WaitableEvent* event);
 105 #endif
 106
 107   ChildProcessData data_;
 108   BrowserChildProcessHostDelegate* delegate_;
 109   scoped_ptr<ChildProcessHost> child_process_host_;
 110
 111   scoped_ptr<ChildProcessLauncher> child_process_;
 112
 113   PowerMonitorMessageBroadcaster power_monitor_message_broadcaster_;
 114
 115 #if defined(OS_WIN)
 116   // Watches to see if the child process exits before the IPC channel has
 117   // been connected. Thereafter, its exit is determined by an error on the
 118   // IPC channel.
 119   base::WaitableEventWatcher early_exit_watcher_;
 120 #endif
 121 };
 122
 123 }  // namespace content
 124
 125 #endif  // CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_