68 lines
1.8 KiB
Go
68 lines
1.8 KiB
Go
package glossary
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import (
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"errors"
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"time"
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)
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// DtWatch is a delta time checker.
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type DtWatch struct {
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init *time.Time
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last *time.Time
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}
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// Start () is required in order to call other methods of a DtWatch.
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func (watch *DtWatch) Start() {
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byVal1 := time.Now()
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byVal2 := byVal1
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watch.init = &byVal1
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watch.last = &byVal2
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}
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// IsStarted () determines whether it has started or not.
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// .Start() is <not> required in order to call this method.
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func (watch DtWatch) IsStarted() bool {
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if watch.init == nil {
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return false
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} else if watch.init != nil {
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return true
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} else {
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panic(errors.New("It might be thread"))
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}
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}
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// GetTimeStarted gets the time it started.
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// .Start() must be called prior to calling this method.
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func (watch DtWatch) GetTimeStarted() time.Time {
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return *watch.init
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}
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// SetTimeStarted sets the time it started.
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// .Start() must be called prior to calling this method.
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func (watch *DtWatch) SetTimeStarted(t time.Time) {
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*watch.init = t
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}
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// Dt since last Dt() or DtNano().
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// .Start() must be called prior to calling this method.
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func (watch *DtWatch) Dt() (deltaTimeInSeconds float64) {
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deltaTimeInSeconds = time.Since(time.Time(*watch.last)).Seconds()
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*watch.last = time.Now()
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return
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}
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// DtNano since last Dt() or DtNano().
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// It returns a time instance with nanosecond precision.
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// .Start() must be called prior to calling this method.
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func (watch *DtWatch) DtNano() (deltaTimeInNanosec time.Duration) {
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deltaTimeInNanosec = time.Since(time.Time(*watch.last))
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*watch.last = time.Now()
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return
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}
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// DtSinceStart is dt since last Start().
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// .Start() must be called prior to calling this method.
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func (watch DtWatch) DtSinceStart() (deltaTimeInSeconds float64) {
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return time.Since(time.Time(*watch.init)).Seconds()
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}
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