screen_drawer_lock_posix.h (1263B)
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 "absl/strings/string_view.h" 17 #include "modules/desktop_capture/screen_drawer.h" 18 19 namespace webrtc { 20 21 class ScreenDrawerLockPosix final : public ScreenDrawerLock { 22 public: 23 ScreenDrawerLockPosix(); 24 // Provides a name other than the default one for test only. 25 explicit ScreenDrawerLockPosix(const char* name); 26 ~ScreenDrawerLockPosix() override; 27 28 // Unlinks the named semaphore actively. This will remove the sem_t object in 29 // the system and allow others to create a different sem_t object with the 30 // same/ name. 31 static void Unlink(absl::string_view name); 32 33 private: 34 sem_t* semaphore_; 35 }; 36 37 } // namespace webrtc 38 39 #endif // MODULES_DESKTOP_CAPTURE_SCREEN_DRAWER_LOCK_POSIX_H_