1 /* 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_DESKTOP_CAPTURE_WIN_SCOPED_THREAD_DESKTOP_H_ 12 #define MODULES_DESKTOP_CAPTURE_WIN_SCOPED_THREAD_DESKTOP_H_ 13 14 #include <windows.h> 15 16 #include <memory> 17 18 #include "rtc_base/system/rtc_export.h" 19 20 namespace webrtc { 21 22 class Desktop; 23 24 class RTC_EXPORT ScopedThreadDesktop { 25 public: 26 ScopedThreadDesktop(); 27 ~ScopedThreadDesktop(); 28 29 ScopedThreadDesktop(const ScopedThreadDesktop&) = delete; 30 ScopedThreadDesktop& operator=(const ScopedThreadDesktop&) = delete; 31 32 // Returns true if `desktop` has the same desktop name as the currently 33 // assigned desktop (if assigned) or as the initial desktop (if not assigned). 34 // Returns false in any other case including failing Win32 APIs and 35 // uninitialized desktop handles. 36 bool IsSame(const Desktop& desktop); 37 38 // Reverts the calling thread to use the initial desktop. 39 void Revert(); 40 41 // Assigns `desktop` to be the calling thread. Returns true if the thread has 42 // been switched to `desktop` successfully. Takes ownership of `desktop`. 43 bool SetThreadDesktop(Desktop* desktop); 44 45 private: 46 // The desktop handle assigned to the calling thread by Set 47 std::unique_ptr<Desktop> assigned_; 48 49 // The desktop handle assigned to the calling thread at creation. 50 std::unique_ptr<Desktop> initial_; 51 }; 52 53 } // namespace webrtc 54 55 #endif // MODULES_DESKTOP_CAPTURE_WIN_SCOPED_THREAD_DESKTOP_H_ 56