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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 <atomic>
#include "base/base_export.h"
#include "base/feature_list.h"
#include "build/build_config.h"
namespace base {
// Note to implementers: thread pool code using task features must absolutely
// not invoke FeatureList::IsEnabled outside of the main thread. Doing so
// causes data races between worker threads and ~FeatureList when tests end
// (crbug.com/1344573). A reliable moment to query and cache the feature state
// is on ThreadPoolImpl::Start (and thus also on the first WorkerThread::Start,
// not the later ones) as this is invoked from the main thread after
// initializing the FeatureList. If caching the feature state in a static, you
// must be aware that all tests sharing a process will have the same state,
// regardless of future ScopedFeatureList instances.
BASE_FEATURE(kUseUtilityThreadGroup,
"UseUtilityThreadGroup",
FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kAddTaskLeewayFeature,
"AddTaskLeeway",
FEATURE_ENABLED_BY_DEFAULT);
// Note: Do not use the prepared macro as of no need for a local cache.
constinit const FeatureParam<TimeDelta> kTaskLeewayParam{
&kAddTaskLeewayFeature, "leeway", kDefaultLeeway};
BASE_FEATURE_PARAM(TimeDelta,
kMaxPreciseDelay,
&kAddTaskLeewayFeature,
"max_precise_delay",
kDefaultMaxPreciseDelay);
BASE_FEATURE(kAlignWakeUps, "AlignWakeUps", FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kTimerSlackMac, "TimerSlackMac", FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kExplicitHighResolutionTimerWin,
"ExplicitHighResolutionTimerWin",
FEATURE_ENABLED_BY_DEFAULT);
BASE_FEATURE(kUIPumpImprovementsWin,
"UIPumpImprovementsWin",
FEATURE_ENABLED_BY_DEFAULT);
BASE_FEATURE(kPumpFastToSleepAndroid,
"PumpFastToSleepAndroid",
FEATURE_ENABLED_BY_DEFAULT);
#if BUILDFLAG(IS_MAC) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_WIN)
BASE_FEATURE(kRunTasksByBatches,
"RunTasksByBatches",
FEATURE_ENABLED_BY_DEFAULT);
#else
BASE_FEATURE(kRunTasksByBatches,
"RunTasksByBatches",
FEATURE_DISABLED_BY_DEFAULT);
#endif
BASE_FEATURE(kThreadPoolCap2, "ThreadPoolCap2", FEATURE_DISABLED_BY_DEFAULT);
// Note: Do not use the prepared macro as of no need for a local cache.
constinit const FeatureParam<int> kThreadPoolCapRestrictedCount{
&kThreadPoolCap2, "restricted_count", 3};
} // namespace base
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