| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_TASK_TASK_FEATURES_H_ |
| #define BASE_TASK_TASK_FEATURES_H_ |
| |
| #include "base/base_export.h" |
| #include "base/metrics/field_trial_params.h" |
| #include "build/build_config.h" |
| |
| namespace base { |
| |
| struct Feature; |
| |
| extern const BASE_EXPORT Feature kAllTasksUserBlocking; |
| extern const BASE_EXPORT Feature kMergeBlockingNonBlockingPools; |
| |
| // Under this feature, unused threads in ThreadGroup are only detached |
| // if the total number of threads in the pool is above the initial capacity. |
| extern const BASE_EXPORT Feature kNoDetachBelowInitialCapacity; |
| |
| // Under this feature, workers blocked with MayBlock are replaced immediately |
| // instead of waiting for a threshold. |
| extern const BASE_EXPORT Feature kMayBlockWithoutDelay; |
| |
| #if defined(OS_WIN) || defined(OS_MACOSX) |
| #define HAS_NATIVE_THREAD_POOL() 1 |
| #else |
| #define HAS_NATIVE_THREAD_POOL() 0 |
| #endif |
| |
| #if HAS_NATIVE_THREAD_POOL() |
| // Under this feature, ThreadPoolImpl will use a ThreadGroup backed by a |
| // native thread pool implementation. The Windows Thread Pool API and |
| // libdispatch are used on Windows and macOS/iOS respectively. |
| extern const BASE_EXPORT Feature kUseNativeThreadPool; |
| #endif |
| |
| } // namespace base |
| |
| #endif // BASE_TASK_TASK_FEATURES_H_ |