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/*
* Copyright (C) 2014 ~ 2018 Deepin Technology Co., Ltd.
*
* Author: jouyouyun <jouyouwen717@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package timer
import (
"time"
)
type _TimerState uint16
const (
_TimerStateNotStarted _TimerState = iota
_TimerStateStarted
_TimerStateStopped
)
// Timer is used for reporting rate.
type Timer struct {
timer time.Time
duration time.Duration
lastDuration time.Duration
state _TimerState
}
// NewTimer creates a new timer.
func NewTimer() *Timer {
timer := &Timer{
timer: time.Now(),
duration: 0,
state: _TimerStateNotStarted,
}
return timer
}
// Start the timer.
func (timer *Timer) Start() {
timer.state = _TimerStateStarted
timer.timer = time.Now()
}
// Stop timer.
func (timer *Timer) Stop() {
if timer.state&_TimerStateStarted != 1 {
return
}
timer.state = _TimerStateStopped
timer.duration += time.Since(timer.timer)
timer.lastDuration = timer.duration
}
// Continue a stopped timer.
func (timer *Timer) Continue() {
timer.Start()
}
// Reset a timer.
func (timer *Timer) Reset() {
timer.duration = time.Duration(0)
timer.Start()
}
// Elapsed returns the duration from start to end if timer is stopped.
// Elapsed returns the duration from start to now if timer is not stopped.
func (timer *Timer) Elapsed() time.Duration {
if timer.state == _TimerStateStarted {
return timer.lastDuration + time.Since(timer.timer)
}
return timer.duration
}
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