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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/task/task_features.h"
#include "base/base_export.h"
#include "base/feature_list.h"
namespace base {
#if HAS_NATIVE_THREAD_POOL()
BASE_FEATURE(kUseNativeThreadPool,
"UseNativeThreadPool",
base::FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kUseBackgroundNativeThreadPool,
"UseBackgroundNativeThreadPool",
base::FEATURE_DISABLED_BY_DEFAULT);
#endif
BASE_FEATURE(kNoWorkerThreadReclaim,
"NoWorkerThreadReclaim",
base::FEATURE_DISABLED_BY_DEFAULT);
// static
BASE_FEATURE(kNoWakeUpsForCanceledTasks,
"NoWakeUpsForCanceledTasks",
FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kRemoveCanceledTasksInTaskQueue,
"RemoveCanceledTasksInTaskQueue2",
base::FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kAlwaysAbandonScheduledTask,
"AlwaysAbandonScheduledTask",
base::FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kAddTaskLeewayFeature,
"AddTaskLeeway",
base::FEATURE_ENABLED_BY_DEFAULT);
const base::FeatureParam<TimeDelta> kTaskLeewayParam{&kAddTaskLeewayFeature,
"leeway", kDefaultLeeway};
BASE_FEATURE(kAlignWakeUps, "AlignWakeUps", base::FEATURE_ENABLED_BY_DEFAULT);
BASE_FEATURE(kExplicitHighResolutionTimerWin,
"ExplicitHighResolutionTimerWin",
base::FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kRunTasksByBatches,
"RunTasksByBatches",
base::FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kBrowserPeriodicYieldingToNative,
"BrowserPeriodicYieldingToNative",
base::FEATURE_DISABLED_BY_DEFAULT);
const BASE_EXPORT base::FeatureParam<base::TimeDelta>
kBrowserPeriodicYieldingToNativeNormalInputAfterMsParam{
&kBrowserPeriodicYieldingToNative,
"yield_to_android_looper_after_ms_normal_input", base::Milliseconds(8)};
const BASE_EXPORT base::FeatureParam<base::TimeDelta>
kBrowserPeriodicYieldingToNativeFlingInputAfterMsParam{
&kBrowserPeriodicYieldingToNative,
"yield_to_android_looper_after_ms_fling_input", base::Milliseconds(16)};
const BASE_EXPORT base::FeatureParam<base::TimeDelta>
kBrowserPeriodicYieldingToNativeNoInputAfterMsParam{
&kBrowserPeriodicYieldingToNative,
"yield_to_android_looper_after_ms_no_input", base::Milliseconds(100)};
const BASE_EXPORT base::FeatureParam<base::TimeDelta>
kBrowserPeriodicYieldingToNativeDelay{&kBrowserPeriodicYieldingToNative,
"non_delayed_looper_defer_for_ns",
base::Nanoseconds(500000)};
// Leeway value applied to delayed tasks. An atomic is used here because the
// value is queried from multiple threads.
std::atomic<TimeDelta> g_task_leeway{kDefaultLeeway};
BASE_EXPORT void InitializeTaskLeeway() {
g_task_leeway.store(kTaskLeewayParam.Get(), std::memory_order_relaxed);
}
BASE_EXPORT TimeDelta GetTaskLeeway() {
return g_task_leeway.load(std::memory_order_relaxed);
}
} // namespace base
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