1 /* 2 * Copyright (c) 2017 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_SCREEN_DRAWER_LOCK_POSIX_H_ 12 #define MODULES_DESKTOP_CAPTURE_SCREEN_DRAWER_LOCK_POSIX_H_ 13 14 #include <semaphore.h> 15 16 #include "modules/desktop_capture/screen_drawer.h" 17 18 namespace webrtc { 19 20 class ScreenDrawerLockPosix final : public ScreenDrawerLock { 21 public: 22 ScreenDrawerLockPosix(); 23 // Provides a name other than the default one for test only. 24 explicit ScreenDrawerLockPosix(const char* name); 25 ~ScreenDrawerLockPosix() override; 26 27 // Unlinks the named semaphore actively. This will remove the sem_t object in 28 // the system and allow others to create a different sem_t object with the 29 // same/ name. 30 static void Unlink(const char* name); 31 32 private: 33 sem_t* semaphore_; 34 }; 35 36 } // namespace webrtc 37 38 #endif // MODULES_DESKTOP_CAPTURE_SCREEN_DRAWER_LOCK_POSIX_H_ 39