51 lines
762 B
Go
51 lines
762 B
Go
package sleepct
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import (
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"fmt"
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"sync"
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"time"
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)
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// SleepCT - Sleep constant time step crates a sleep based ticker
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// designed maintain a sleep/tick interval
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type SleepCT struct {
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sync.Mutex
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d time.Duration // duration
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t time.Time // last time target
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}
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func (s *SleepCT) Start(d time.Duration) {
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if s.t.IsZero() {
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s.d = d
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s.t = time.Now()
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} else {
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panic("SleepCT already started")
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}
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}
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func (s *SleepCT) SleepNextTarget() {
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s.Lock()
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now := time.Now()
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var last time.Time
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if s.t.IsZero() {
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fmt.Println("SleepCT reset")
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last = now.Add(-s.d)
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} else {
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last = s.t
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}
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// Next Target
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s.t = last.Add(s.d)
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d := s.t.Sub(now)
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time.Sleep(d)
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// delta := now.Sub(s.t)
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// fmt.Println("delta", delta, d, time.Since(s.t))
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s.Unlock()
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}
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