waiter.h (2462B)
1 // Copyright 2017 The Abseil Authors. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 16 #ifndef ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_ 17 #define ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_ 18 19 #include "absl/base/config.h" 20 #include "absl/synchronization/internal/futex_waiter.h" 21 #include "absl/synchronization/internal/pthread_waiter.h" 22 #include "absl/synchronization/internal/sem_waiter.h" 23 #include "absl/synchronization/internal/stdcpp_waiter.h" 24 #include "absl/synchronization/internal/win32_waiter.h" 25 26 // May be chosen at compile time via -DABSL_FORCE_WAITER_MODE=<index> 27 #define ABSL_WAITER_MODE_FUTEX 0 28 #define ABSL_WAITER_MODE_SEM 1 29 #define ABSL_WAITER_MODE_CONDVAR 2 30 #define ABSL_WAITER_MODE_WIN32 3 31 #define ABSL_WAITER_MODE_STDCPP 4 32 33 #if defined(ABSL_FORCE_WAITER_MODE) 34 #define ABSL_WAITER_MODE ABSL_FORCE_WAITER_MODE 35 #elif defined(ABSL_INTERNAL_HAVE_WIN32_WAITER) 36 #define ABSL_WAITER_MODE ABSL_WAITER_MODE_WIN32 37 #elif defined(ABSL_INTERNAL_HAVE_FUTEX_WAITER) 38 #define ABSL_WAITER_MODE ABSL_WAITER_MODE_FUTEX 39 #elif defined(ABSL_INTERNAL_HAVE_SEM_WAITER) 40 #define ABSL_WAITER_MODE ABSL_WAITER_MODE_SEM 41 #elif defined(ABSL_INTERNAL_HAVE_PTHREAD_WAITER) 42 #define ABSL_WAITER_MODE ABSL_WAITER_MODE_CONDVAR 43 #elif defined(ABSL_INTERNAL_HAVE_STDCPP_WAITER) 44 #define ABSL_WAITER_MODE ABSL_WAITER_MODE_STDCPP 45 #else 46 #error ABSL_WAITER_MODE is undefined 47 #endif 48 49 namespace absl { 50 ABSL_NAMESPACE_BEGIN 51 namespace synchronization_internal { 52 53 #if ABSL_WAITER_MODE == ABSL_WAITER_MODE_FUTEX 54 using Waiter = FutexWaiter; 55 #elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_SEM 56 using Waiter = SemWaiter; 57 #elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_CONDVAR 58 using Waiter = PthreadWaiter; 59 #elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_WIN32 60 using Waiter = Win32Waiter; 61 #elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_STDCPP 62 using Waiter = StdcppWaiter; 63 #endif 64 65 } // namespace synchronization_internal 66 ABSL_NAMESPACE_END 67 } // namespace absl 68 69 #endif // ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_