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v/vlib/time/stopwatch.v

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// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module time
pub struct StopWatch {
mut:
pause_time u64
pub mut:
start u64
end u64
}
pub fn new_stopwatch() StopWatch {
return StopWatch{start: time.sys_mono_now()}
}
// start Starts the timer. If the timer was paused, restarts counting.
pub fn (t mut StopWatch) start() {
if t.pause_time == 0 {
t.start = time.sys_mono_now()
} else {
t.start += time.sys_mono_now() - t.pause_time
}
t.end = 0
t.pause_time = 0
}
pub fn (t mut StopWatch) restart() {
t.end = 0
t.pause_time = 0
t.start = time.sys_mono_now()
}
pub fn (t mut StopWatch) stop() {
t.end = time.sys_mono_now()
t.pause_time = 0
}
pub fn (t mut StopWatch) pause() {
t.pause_time = time.sys_mono_now()
t.end = t.pause_time // so elapsed keeps track of actual running time
}
// elapsed returns the Duration since the last start call
pub fn (t StopWatch) elapsed() Duration {
if t.end == 0 {
return Duration(time.sys_mono_now() - t.start)
} else {
return Duration(t.end - t.start)
}
}