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52 lines
1.7 KiB
Go
52 lines
1.7 KiB
Go
/*
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Copyright 2023 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package wait
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import (
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"context"
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"sync"
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"time"
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"k8s.io/utils/clock"
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)
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// DelayFunc returns the next time interval to wait.
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type DelayFunc func() time.Duration
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// Timer takes an arbitrary delay function and returns a timer that can handle arbitrary interval changes.
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// Use Backoff{...}.Timer() for simple delays and more efficient timers.
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func (fn DelayFunc) Timer(c clock.Clock) Timer {
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return &variableTimer{fn: fn, new: c.NewTimer}
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}
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// Until takes an arbitrary delay function and runs until cancelled or the condition indicates exit. This
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// offers all of the functionality of the methods in this package.
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func (fn DelayFunc) Until(ctx context.Context, immediate, sliding bool, condition ConditionWithContextFunc) error {
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return loopConditionUntilContext(ctx, &variableTimer{fn: fn, new: internalClock.NewTimer}, immediate, sliding, condition)
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}
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// Concurrent returns a version of this DelayFunc that is safe for use by multiple goroutines that
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// wish to share a single delay timer.
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func (fn DelayFunc) Concurrent() DelayFunc {
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var lock sync.Mutex
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return func() time.Duration {
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lock.Lock()
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defer lock.Unlock()
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return fn()
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}
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}
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