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package util
import "sync"
type UnboundedQueue struct {
outbound []string
outboundLock sync.RWMutex
inbound []string
inboundLock sync.RWMutex
}
func NewUnboundedQueue() *UnboundedQueue {
q := &UnboundedQueue{}
return q
}
func (q *UnboundedQueue) EnQueue(items ...string) {
q.inboundLock.Lock()
defer q.inboundLock.Unlock()
q.inbound = append(q.inbound, items...)
}
func (q *UnboundedQueue) Consume(fn func([]string)) {
q.outboundLock.Lock()
defer q.outboundLock.Unlock()
if len(q.outbound) == 0 {
q.inboundLock.Lock()
inboundLen := len(q.inbound)
if inboundLen > 0 {
t := q.outbound
q.outbound = q.inbound
q.inbound = t
}
q.inboundLock.Unlock()
}
if len(q.outbound) > 0 {
fn(q.outbound)
q.outbound = q.outbound[:0]
}
}
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