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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, 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, FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kTimerSlackMac, FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kUIPumpImprovementsWin, FEATURE_ENABLED_BY_DEFAULT);
BASE_FEATURE(kRunTasksByBatches,
#if BUILDFLAG(IS_MAC) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_WIN)
FEATURE_ENABLED_BY_DEFAULT);
#else
FEATURE_DISABLED_BY_DEFAULT);
#endif
} // namespace base
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