mirror of
https://github.com/0glabs/0g-chain.git
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52 lines
735 B
Go
52 lines
735 B
Go
package sizedw8grp
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import (
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"context"
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"math"
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"sync"
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)
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type SizedWaitGroup struct {
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Size int
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current chan struct{}
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wg sync.WaitGroup
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}
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func New(limit int) SizedWaitGroup {
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size := math.MaxInt32
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if limit > 0 {
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size = limit
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}
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return SizedWaitGroup{
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Size: size,
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current: make(chan struct{}, size),
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wg: sync.WaitGroup{},
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}
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}
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func (s *SizedWaitGroup) Add() {
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_ = s.AddWithContext(context.Background())
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}
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func (s *SizedWaitGroup) AddWithContext(ctx context.Context) error {
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select {
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case <-ctx.Done():
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return ctx.Err()
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case s.current <- struct{}{}:
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break
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}
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s.wg.Add(1)
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return nil
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}
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func (s *SizedWaitGroup) Done() {
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<-s.current
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s.wg.Done()
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}
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func (s *SizedWaitGroup) Wait() {
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s.wg.Wait()
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}
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