1 // Copyright 2018 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_TASK_THREAD_POOL_WORKER_THREAD_OBSERVER_H_ 6 #define BASE_TASK_THREAD_POOL_WORKER_THREAD_OBSERVER_H_ 7 8 namespace base { 9 10 // Interface to observe entry and exit of the main function of a ThreadPool 11 // worker. 12 class WorkerThreadObserver { 13 public: 14 virtual ~WorkerThreadObserver() = default; 15 16 // Invoked at the beginning of the main function of a ThreadPool worker, 17 // before any task runs. 18 virtual void OnWorkerThreadMainEntry() = 0; 19 20 // Invoked at the end of the main function of a ThreadPool worker, when it 21 // can no longer run tasks. 22 virtual void OnWorkerThreadMainExit() = 0; 23 }; 24 25 } // namespace base 26 27 #endif // BASE_TASK_THREAD_POOL_WORKER_THREAD_OBSERVER_H_ 28