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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_TASK_DELAY_POLICY_H_
#define BASE_TASK_DELAY_POLICY_H_
#include "base/time/time.h"
namespace base {
namespace subtle {
// Policies affecting how a delayed task is scheduled when a TimeTicks is
// specified.
enum class DelayPolicy {
// A delayed task with kFlexibleNoSooner may not run any sooner than the
// specified time, but might run slightly after. This is the behavior implied
// by PostDelayedTask.
kFlexibleNoSooner,
// A delayed task with kFlexiblePreferEarly means the task should attempt to
// run near the deadline and preferably a little bit before than after if the
// scheduler applies slack.
kFlexiblePreferEarly,
// A delayed task with kPrecise means it may not run any sooner than the
// specified time and preferably as close as possible to the specified time,
// which may affect scheduling policies if the scheduler usually applies
// slack.
kPrecise,
};
inline DelayPolicy MaybeOverrideDelayPolicy(DelayPolicy delay_policy,
TimeDelta delay,
TimeDelta max_precise_delay) {
if (delay >= max_precise_delay && delay_policy == DelayPolicy::kPrecise) {
return DelayPolicy::kFlexibleNoSooner;
}
return delay_policy;
}
} // namespace subtle
} // namespace base
#endif // BASE_TASK_DELAY_POLICY_H_
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