content/public/utility/utility_thread.h

// 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 CONTENT_PUBLIC_UTILITY_UTILITY_THREAD_H_
#define CONTENT_PUBLIC_UTILITY_UTILITY_THREAD_H_

#include "base/basictypes.h"
#include "content/common/content_export.h"
#include "ipc/ipc_sender.h"

#if defined(OS_WIN)
#include <windows.h>
#endif

namespace content {

class CONTENT_EXPORT UtilityThread : public IPC::Sender {
 public:
  // Returns the one utility thread for this process.  Note that this can only
  // be accessed when running on the utility thread itself.
  static UtilityThread* Get();

  UtilityThread();
  ~UtilityThread() override;

  // Releases the process if we are not (or no longer) in batch mode.
  virtual void ReleaseProcessIfNeeded() = 0;

#if defined(OS_WIN)
  // Request that the given font be loaded by the browser so it's cached by the
  // OS. Please see ChildProcessHost::PreCacheFont for details.
  virtual void PreCacheFont(const LOGFONT& log_font) = 0;

  // Release cached font.
  virtual void ReleaseCachedFonts() = 0;
#endif
};

}  // namespace content

#endif  // CONTENT_PUBLIC_UTILITY_UTILITY_THREAD_H_