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/constructor_magic.h" 19 #include "rtc_base/system/rtc_export.h" 20 21 namespace webrtc { 22 23 class Desktop; 24 25 class RTC_EXPORT ScopedThreadDesktop { 26 public: 27 ScopedThreadDesktop(); 28 ~ScopedThreadDesktop(); 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 RTC_DISALLOW_COPY_AND_ASSIGN(ScopedThreadDesktop); 51 }; 52 53 } // namespace webrtc 54 55 #endif // MODULES_DESKTOP_CAPTURE_WIN_SCOPED_THREAD_DESKTOP_H_ 56