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/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_DESKTOP_CAPTURE_WIN_SCOPED_THREAD_DESKTOP_H_
#define MODULES_DESKTOP_CAPTURE_WIN_SCOPED_THREAD_DESKTOP_H_
#include <windows.h>
#include <memory>
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
class Desktop;
class RTC_EXPORT ScopedThreadDesktop {
public:
ScopedThreadDesktop();
~ScopedThreadDesktop();
ScopedThreadDesktop(const ScopedThreadDesktop&) = delete;
ScopedThreadDesktop& operator=(const ScopedThreadDesktop&) = delete;
// 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. Takes ownership of `desktop`.
bool SetThreadDesktop(Desktop* desktop);
private:
// The desktop handle assigned to the calling thread by Set
std::unique_ptr<Desktop> assigned_;
// The desktop handle assigned to the calling thread at creation.
std::unique_ptr<Desktop> initial_;
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_WIN_SCOPED_THREAD_DESKTOP_H_
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