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28 lines
330 B
Go
28 lines
330 B
Go
package main
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import "sync"
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type limiter struct {
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l chan struct{}
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w sync.WaitGroup
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}
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func newLimiter(max int) *limiter {
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return &limiter{
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l: make(chan struct{}, max),
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}
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}
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func (l *limiter) Add() {
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l.l <- struct{}{}
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l.w.Add(1)
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}
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func (l *limiter) Done() {
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<-l.l
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l.w.Done()
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}
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func (l *limiter) Wait() {
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l.w.Wait()
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}
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