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bug.go
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bug.go
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// ticker / clear cgo bug test
package main
import (
"fmt"
"math/rand"
"sync"
"time"
)
var BlinkMSec = 200
const NBlinkers = 20
var Blinkers [NBlinkers]*time.Ticker
// BlinkFunc
func BlinkFunc(blinkn int) {
for {
if Blinkers[blinkn] == nil {
return // shutdown..
}
<-Blinkers[blinkn].C
// fmt.Printf("blink %v\n", blinkn)
}
}
func main() {
var wait sync.WaitGroup
for i := 0; i < NBlinkers; i++ {
Blinkers[i] = time.NewTicker(time.Duration(rand.Intn(BlinkMSec)) * time.Millisecond)
go BlinkFunc(i)
wait.Add(1)
}
go runClear()
go runClear()
go runClear()
go runClear()
go runClear()
wait.Wait()
}
var mu sync.Mutex
func runClear() {
for j := 0; j < 10000; j++ {
txt := fmt.Sprintf("some random text %v and some more %v and some more %v\n", j, j, j)
mu.Lock()
WriteText([]byte(txt))
mu.Unlock()
// fmt.Print(txt)
time.Sleep(time.Duration(rand.Intn(BlinkMSec)) * time.Millisecond)
}
}