42 lines
605 B
Go
42 lines
605 B
Go
package wait
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import (
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"sync"
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)
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type Wait interface {
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Register(id int64) <-chan interface{}
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Trigger(id int64, x interface{})
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}
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type List struct {
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l sync.Mutex
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m map[int64]chan interface{}
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}
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func New() *List {
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return &List{m: make(map[int64]chan interface{})}
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}
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func (w *List) Register(id int64) <-chan interface{} {
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w.l.Lock()
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defer w.l.Unlock()
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ch := w.m[id]
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if ch == nil {
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ch = make(chan interface{}, 1)
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w.m[id] = ch
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}
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return ch
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}
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func (w *List) Trigger(id int64, x interface{}) {
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w.l.Lock()
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ch := w.m[id]
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delete(w.m, id)
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w.l.Unlock()
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if ch != nil {
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ch <- x
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close(ch)
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}
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}
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