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// 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 MEDIA_VIDEO_CAPTURE_SCREEN_WIN_SCOPED_THREAD_DESKTOP_H_
#define MEDIA_VIDEO_CAPTURE_SCREEN_WIN_SCOPED_THREAD_DESKTOP_H_
#include <windows.h>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "media/base/media_export.h"
namespace media {
class Desktop;
class MEDIA_EXPORT ScopedThreadDesktop {
public:
ScopedThreadDesktop();
~ScopedThreadDesktop();
// Returns true if |desktop| has the same desktop name as the currently
// assigned desktop (if assigned) or as the initial desktop (if not assigned).
// Returns false in any other case including failing Win32 APIs and
// uninitialized desktop handles.
bool IsSame(const Desktop& desktop);
// Reverts the calling thread to use the initial desktop.
void Revert();
// Assigns |desktop| to be the calling thread. Returns true if the thread has
// been switched to |desktop| successfully.
bool SetThreadDesktop(scoped_ptr<Desktop> desktop);
private:
// The desktop handle assigned to the calling thread by Set
scoped_ptr<Desktop> assigned_;
// The desktop handle assigned to the calling thread at creation.
scoped_ptr<Desktop> initial_;
DISALLOW_COPY_AND_ASSIGN(ScopedThreadDesktop);
};
} // namespace media
#endif // MEDIA_VIDEO_CAPTURE_SCREEN_WIN_SCOPED_THREAD_DESKTOP_H_
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