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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 StopWatchOptions {
auto_start bool = true
}
pub struct StopWatch {
mut:
elapsed u64
pub mut:
start u64
end u64
}
pub fn new_stopwatch(opts StopWatchOptions) StopWatch {
mut initial := u64(0)
if opts.auto_start {
initial = time.sys_mono_now()
}
return StopWatch{elapsed: 0, start: initial, end: 0}
}
// start Starts the timer. If the timer was paused, restarts counting.
pub fn (mut t StopWatch) start() {
t.start = time.sys_mono_now()
t.end = 0
}
pub fn (mut t StopWatch) restart() {
t.start = time.sys_mono_now()
t.end = 0
t.elapsed = 0
}
pub fn (mut t StopWatch) stop() {
t.end = time.sys_mono_now()
}
pub fn (mut t StopWatch) pause() {
if t.start > 0 {
if t.end == 0 {
t.elapsed += time.sys_mono_now() - t.start
} else {
t.elapsed += t.end - t.start
}
}
t.start = 0
}
// elapsed returns the Duration since the last start call
pub fn (t StopWatch) elapsed() Duration {
if t.start > 0 {
if t.end == 0 {
return Duration(time.sys_mono_now() - t.start + t.elapsed)
} else {
return Duration(t.end - t.start + t.elapsed)
}
}
return Duration(t.elapsed)
}