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queue.go
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queue.go
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package pool
import (
"github.com/eapache/queue"
"runtime"
"sync"
)
type Queue struct {
sync.Mutex
popable *sync.Cond
buffer *queue.Queue
closed bool
}
func NewQueue() *Queue {
e := &Queue{
buffer: queue.New(),
}
e.popable = sync.NewCond(&e.Mutex)
return e
}
func (e *Queue) Push(v interface{}) {
e.Mutex.Lock()
defer e.Mutex.Unlock()
if !e.closed {
e.buffer.Add(v)
e.popable.Signal()
}
}
func (e *Queue) Close() {
e.Mutex.Lock()
defer e.Mutex.Unlock()
if !e.closed {
e.closed = true
e.popable.Broadcast() //广播
}
}
//Pop 取出队列,(阻塞模式)
func (e *Queue) Pop() (v interface{}) {
c := e.popable
buffer := e.buffer
e.Mutex.Lock()
defer e.Mutex.Unlock()
for buffer.Length() == 0 && !e.closed {
c.Wait()
}
if e.closed { //已关闭
return
}
if buffer.Length() > 0 {
v = buffer.Peek()
buffer.Remove()
}
return
}
//试着取出队列(非阻塞模式)返回ok == false 表示空
func (e *Queue) TryPop() (v interface{}, ok bool) {
buffer := e.buffer
e.Mutex.Lock()
defer e.Mutex.Unlock()
if buffer.Length() > 0 {
v = buffer.Peek()
buffer.Remove()
ok = true
} else if e.closed {
ok = true
}
return
}
// 获取队列长度
func (e *Queue) Len() int {
return e.buffer.Length()
}
//Wait 等待队列消费完成
func (e *Queue) Wait() {
for {
if e.closed || e.buffer.Length() == 0 {
break
}
runtime.Gosched() //出让时间片
}
}