47 lines
880 B
Markdown
47 lines
880 B
Markdown
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# concurrent
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concurrent utils for golang
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## peference
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```bash
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// concurrent.semaphore
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BenchmarkSemaphore(TryAcquire()&&Release()) 20000000 89.6 ns/op
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BenchmarkSemaphoreConcurrent(TryAcquire()&&Release()) 20000000 89.9 ns/op
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```
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## usage
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```go
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package main
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import(
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"fmt"
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"time"
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nsema "github.com/niean/gotools/concurrent/semaphore"
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)
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func main(){
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// init sema
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concurrentNum := 2 // 5,10..
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sema := nsema.NewSemaphore(concurrentNum)
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// use sema
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for i:=0; i<100; i++ {
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go func(num int){
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if !sema.TryAcquire() {
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fmt.Printf("%d, get sema, fail\n", num)
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return
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}
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defer sema.Release()
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time.Sleep(1*time.Nanosecond)
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fmt.Printf("%d, get sema, ok\n", num)
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}(i)
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}
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// keep alive
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time.Sleep(2*time.Second)
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}
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```
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## reference
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TODO
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