47 lines
955 B
Go
47 lines
955 B
Go
package moreatomic
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import (
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"sync/atomic"
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"time"
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)
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type Time struct {
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unixnano int64
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}
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func Now() *Time {
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return &Time{
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unixnano: time.Now().UnixNano(),
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}
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}
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func (t *Time) Get() time.Time {
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nano := atomic.LoadInt64(&t.unixnano)
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return time.Unix(0, nano)
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}
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func (t *Time) Set(time time.Time) {
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atomic.StoreInt64(&t.unixnano, time.UnixNano())
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}
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// HasBeen checks if it has been this long since the last time. If yes, it will
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// set the time.
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func (t *Time) HasBeen(dura time.Duration) bool {
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now := time.Now()
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nano := atomic.LoadInt64(&t.unixnano)
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// We have to be careful of zero values.
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if nano != 0 {
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// Subtract the duration to now. If subtracted now is before the stored
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// time, that means it hasn't been that long yet. We also have to be careful
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// of an unitialized time.
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if now.Add(-dura).Before(time.Unix(0, nano)) {
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return false
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}
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}
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// It has been that long, so store the variable.
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t.Set(now)
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return true
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}
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