35 lines
499 B
Go
35 lines
499 B
Go
package libcontainerd // import "github.com/docker/docker/libcontainerd"
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import "sync"
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type queue struct {
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sync.Mutex
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fns map[string]chan struct{}
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}
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func (q *queue) append(id string, f func()) {
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q.Lock()
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defer q.Unlock()
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if q.fns == nil {
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q.fns = make(map[string]chan struct{})
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}
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done := make(chan struct{})
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fn, ok := q.fns[id]
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q.fns[id] = done
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go func() {
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if ok {
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<-fn
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}
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f()
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close(done)
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q.Lock()
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if q.fns[id] == done {
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delete(q.fns, id)
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}
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q.Unlock()
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}()
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}
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