pthread_waiter.h (1665B)
1 // Copyright 2023 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_PTHREAD_WAITER_H_ 17 #define ABSL_SYNCHRONIZATION_INTERNAL_PTHREAD_WAITER_H_ 18 19 #if !defined(_WIN32) && !defined(__MINGW32__) 20 #include <pthread.h> 21 22 #include "absl/base/config.h" 23 #include "absl/synchronization/internal/kernel_timeout.h" 24 #include "absl/synchronization/internal/waiter_base.h" 25 26 namespace absl { 27 ABSL_NAMESPACE_BEGIN 28 namespace synchronization_internal { 29 30 #define ABSL_INTERNAL_HAVE_PTHREAD_WAITER 1 31 32 class PthreadWaiter : public WaiterCrtp<PthreadWaiter> { 33 public: 34 PthreadWaiter(); 35 36 bool Wait(KernelTimeout t); 37 void Post(); 38 void Poke(); 39 40 static constexpr char kName[] = "PthreadWaiter"; 41 42 private: 43 int TimedWait(KernelTimeout t); 44 45 // REQUIRES: mu_ must be held. 46 void InternalCondVarPoke(); 47 48 pthread_mutex_t mu_; 49 pthread_cond_t cv_; 50 int waiter_count_; 51 int wakeup_count_; // Unclaimed wakeups. 52 }; 53 54 } // namespace synchronization_internal 55 ABSL_NAMESPACE_END 56 } // namespace absl 57 58 #endif // !defined(_WIN32) && !defined(__MINGW32__) 59 60 #endif // ABSL_SYNCHRONIZATION_INTERNAL_PTHREAD_WAITER_H_