Created
January 13, 2016 00:55
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package main | |
import ( | |
"syscall" | |
"time" | |
"unsafe" | |
) | |
const ( | |
TickPerMillisecond int64 = 0x2710 | |
TicksPerSecond int64 = 0x989680 | |
) | |
var ( | |
modkernel32 = syscall.NewLazyDLL("kernel32.dll") | |
procQueryPerformanceFrequency = modkernel32.NewProc("QueryPerformanceFrequency") | |
procQueryPerformanceCounter = modkernel32.NewProc("QueryPerformanceCounter") | |
procSleep = modkernel32.NewProc("Sleep") | |
) | |
type stopWatch struct { | |
elapsed int64 | |
startTimeStamp int64 | |
isRunning bool | |
start time.Time | |
IsHighResolution bool | |
Frequery int64 | |
tickFrequery float64 | |
} | |
func NewStopWatch() *stopWatch { | |
sw := new(stopWatch) | |
if err := queryPerformanceFrequency(&sw.Frequery); err != nil { | |
sw.IsHighResolution = false | |
sw.Frequery = 0x989680 | |
sw.tickFrequery = 1.0 | |
} else { | |
sw.IsHighResolution = true | |
sw.tickFrequery = 10000000.0 | |
sw.tickFrequery /= float64(sw.Frequery) | |
} | |
return sw | |
} | |
func StartNew() *stopWatch { | |
sw := new(stopWatch) | |
sw.Start() | |
return sw | |
} | |
func (this *stopWatch) Reset() { | |
this.elapsed = 0 | |
this.startTimeStamp = 0 | |
this.isRunning = false | |
} | |
func (this *stopWatch) Start() { | |
if !this.isRunning { | |
this.startTimeStamp = this.getTimestamp() | |
this.isRunning = true | |
} | |
} | |
func (this *stopWatch) Stop() { | |
if this.isRunning { | |
num2 := this.getTimestamp() - this.startTimeStamp | |
this.elapsed += num2 | |
this.isRunning = false | |
} | |
} | |
func (this *stopWatch) Elapsed() int64 { | |
return this.getElapsedDateTimeTicks() | |
} | |
func (this *stopWatch) ElapsedMilliseconds() int64 { | |
return this.getElapsedDateTimeTicks() / 0x2710 | |
} | |
func (this *stopWatch) ElapsedTicks() int64 { | |
return this.getRawElapsedTicks() | |
} | |
func (this *stopWatch) IsRunning() bool { | |
return this.isRunning | |
} | |
func (this *stopWatch) getElapsedDateTimeTicks() int64 { | |
rawElapsedTicks := this.getRawElapsedTicks() | |
if this.IsHighResolution { | |
num2 := float64(rawElapsedTicks) | |
num2 *= this.tickFrequery | |
return int64(num2) | |
} | |
return rawElapsedTicks | |
} | |
func (this *stopWatch) getRawElapsedTicks() int64 { | |
elapsed := this.elapsed | |
if this.isRunning { | |
num3 := this.getTimestamp() - this.startTimeStamp | |
elapsed += num3 | |
} | |
return elapsed | |
} | |
func (this *stopWatch) getTimestamp() int64 { | |
if this.IsHighResolution { | |
var num int64 | |
queryPerformanceCounter(&num) | |
return num | |
} | |
return time.Now().UTC().Unix() | |
} | |
func queryPerformanceFrequency(frequency *int64) (err error) { | |
r1, _, e1 := syscall.Syscall(procQueryPerformanceFrequency.Addr(), 1, uintptr(unsafe.Pointer(frequency)), 0, 0) | |
if r1 == 0 { | |
if e1 != 0 { | |
err = error(e1) | |
} else { | |
err = syscall.EINVAL | |
} | |
} | |
return | |
} | |
func queryPerformanceCounter(counter *int64) (err error) { | |
r1, _, e1 := syscall.Syscall(procQueryPerformanceCounter.Addr(), 1, uintptr(unsafe.Pointer(counter)), 0, 0) | |
if r1 == 0 { | |
if e1 != 0 { | |
err = error(e1) | |
} else { | |
err = syscall.EINVAL | |
} | |
} | |
return | |
} | |
func sleep(milliseconds uint32) { | |
syscall.Syscall(procSleep.Addr(), 1, uintptr(milliseconds), 0, 0) | |
return | |
} |
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it is a diagnose tool like the stopwatch class in dot Net platform