scoped_thread_desktop.h (1752B)
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 <memory> 15 16 #include "rtc_base/system/rtc_export.h" 17 18 namespace webrtc { 19 20 class Desktop; 21 22 class RTC_EXPORT ScopedThreadDesktop { 23 public: 24 ScopedThreadDesktop(); 25 ~ScopedThreadDesktop(); 26 27 ScopedThreadDesktop(const ScopedThreadDesktop&) = delete; 28 ScopedThreadDesktop& operator=(const ScopedThreadDesktop&) = delete; 29 30 // Returns true if `desktop` has the same desktop name as the currently 31 // assigned desktop (if assigned) or as the initial desktop (if not assigned). 32 // Returns false in any other case including failing Win32 APIs and 33 // uninitialized desktop handles. 34 bool IsSame(const Desktop& desktop); 35 36 // Reverts the calling thread to use the initial desktop. 37 void Revert(); 38 39 // Assigns `desktop` to be the calling thread. Returns true if the thread has 40 // been switched to `desktop` successfully. Takes ownership of `desktop`. 41 bool SetThreadDesktop(Desktop* desktop); 42 43 private: 44 // The desktop handle assigned to the calling thread by Set 45 std::unique_ptr<Desktop> assigned_; 46 47 // The desktop handle assigned to the calling thread at creation. 48 std::unique_ptr<Desktop> initial_; 49 }; 50 51 } // namespace webrtc 52 53 #endif // MODULES_DESKTOP_CAPTURE_WIN_SCOPED_THREAD_DESKTOP_H_