Repo created

TMessagesProj/jni/voip/webrtc/base/task/task_features.h

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+// 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;
+
+// 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 in the foreground thread group.
+extern const BASE_EXPORT Feature kMayBlockWithoutDelay;
+
+// Under this feature, best effort capacity is never increased.
+// While it's unlikely we'd ship this as-is, this experiment allows us to
+// determine whether blocked worker replacement logic on best-effort tasks has
+// any impact on guardian metrics.
+extern const BASE_EXPORT Feature kFixedMaxBestEffortTasks;
+
+#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
+
+// Whether threads in the ThreadPool should be reclaimed after being idle for 5
+// minutes, instead of 30 seconds.
+extern const BASE_EXPORT Feature kUseFiveMinutesThreadReclaimTime;
+
+}  // namespace base
+
+#endif  // BASE_TASK_TASK_FEATURES_H_