content/public/utility/utility_thread.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_PUBLIC_UTILITY_UTILITY_THREAD_H_
   6 #define CONTENT_PUBLIC_UTILITY_UTILITY_THREAD_H_
   7
   8 #include "base/basictypes.h"
   9 #include "content/common/content_export.h"
  10 #include "ipc/ipc_sender.h"
  11
  12 #if defined(OS_WIN)
  13 #include <windows.h>
  14 #endif
  15
  16 namespace content {
  17
  18 class CONTENT_EXPORT UtilityThread : public IPC::Sender {
  19  public:
  20   // Returns the one utility thread for this process.  Note that this can only
  21   // be accessed when running on the utility thread itself.
  22   static UtilityThread* Get();
  23
  24   UtilityThread();
  25   ~UtilityThread() override;
  26
  27   // Releases the process if we are not (or no longer) in batch mode.
  28   virtual void ReleaseProcessIfNeeded() = 0;
  29
  30 #if defined(OS_WIN)
  31   // Request that the given font be loaded by the browser so it's cached by the
  32   // OS. Please see ChildProcessHost::PreCacheFont for details.
  33   virtual void PreCacheFont(const LOGFONT& log_font) = 0;
  34
  35   // Release cached font.
  36   virtual void ReleaseCachedFonts() = 0;
  37 #endif
  38 };
  39
  40 }  // namespace content
  41
  42 #endif  // CONTENT_PUBLIC_UTILITY_UTILITY_THREAD_H_