content/utility/utility_thread_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_UTILITY_UTILITY_THREAD_IMPL_H_
   6 #define CONTENT_UTILITY_UTILITY_THREAD_IMPL_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13 #include "content/child/child_thread.h"
  14 #include "content/common/content_export.h"
  15 #include "content/public/utility/utility_thread.h"
  16
  17 namespace base {
  18 class FilePath;
  19 }
  20
  21 namespace content {
  22 class BlinkPlatformImpl;
  23
  24 // This class represents the background thread where the utility task runs.
  25 class UtilityThreadImpl : public UtilityThread,
  26                           public ChildThread {
  27  public:
  28   UtilityThreadImpl();
  29   // Constructor that's used when running in single process mode.
  30   explicit UtilityThreadImpl(const std::string& channel_name);
  31   virtual ~UtilityThreadImpl();
  32   virtual void Shutdown() OVERRIDE;
  33
  34   virtual bool Send(IPC::Message* msg) OVERRIDE;
  35   virtual void ReleaseProcessIfNeeded() OVERRIDE;
  36 #if defined(OS_WIN)
  37   virtual void PreCacheFont(const LOGFONT& log_font) OVERRIDE;
  38   virtual void ReleaseCachedFonts() OVERRIDE;
  39 #endif
  40
  41  private:
  42   void Init();
  43
  44   // ChildThread implementation.
  45   virtual bool OnControlMessageReceived(const IPC::Message& msg) OVERRIDE;
  46
  47   // IPC message handlers.
  48   void OnBatchModeStarted();
  49   void OnBatchModeFinished();
  50
  51 #if defined(OS_POSIX)
  52   void OnLoadPlugins(const std::vector<base::FilePath>& plugin_paths);
  53 #endif  // OS_POSIX
  54
  55   // True when we're running in batch mode.
  56   bool batch_mode_;
  57
  58   // True if running in single process mode.
  59   bool single_process_;
  60
  61   scoped_ptr<BlinkPlatformImpl> webkit_platform_support_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(UtilityThreadImpl);
  64 };
  65
  66 }  // namespace content
  67
  68 #endif  // CONTENT_UTILITY_UTILITY_THREAD_IMPL_H_