From 70731aff71f7750e34ccc0dcf878fba95614ddd4 Mon Sep 17 00:00:00 2001
From: liyonglion <470542519@qq.com>
Date: Fri, 28 Sep 2018 19:28:09 +0800
Subject: [PATCH] =?UTF-8?q?=E8=A7=A3=E5=86=B3=E6=AD=BB=E5=BE=AA=E7=8E=AF?=
 =?UTF-8?q?=E5=AF=BC=E8=87=B4cpu=E5=8D=A0=E7=94=A8=E7=8E=87=E8=BF=87?=
 =?UTF-8?q?=E9=AB=98?=
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---
 pool.go | 24 +++++++++---------------
 1 file changed, 9 insertions(+), 15 deletions(-)

diff --git a/pool.go b/pool.go
index 987ba4d..5f6ce63 100644
--- a/pool.go
+++ b/pool.go
@@ -52,7 +52,7 @@ type Pool struct {
 
 	// lock for synchronous operation.
 	lock sync.Mutex
-
+	cond *sync.Cond
 	once sync.Once
 }
 
@@ -105,6 +105,7 @@ func NewTimingPool(size, expiry int) (*Pool, error) {
 		release:        make(chan sig, 1),
 		expiryDuration: time.Duration(expiry) * time.Second,
 	}
+	p.cond = sync.NewCond(&p.lock)
 	go p.periodicallyPurge()
 	return p, nil
 }
@@ -195,20 +196,11 @@ func (p *Pool) getWorker() *Worker {
 	p.lock.Unlock()
 
 	if waiting {
-		for {
-			p.lock.Lock()
-			idleWorkers = p.workers
-			l := len(idleWorkers) - 1
-			if l < 0 {
-				p.lock.Unlock()
-				continue
-			}
-			w = idleWorkers[l]
-			idleWorkers[l] = nil
-			p.workers = idleWorkers[:l]
-			p.lock.Unlock()
-			break
-		}
+		p.lock.Lock()
+		p.cond.Wait()
+		l := len(p.workers) - 1
+		w = p.workers[l]
+		p.lock.Unlock()
 	} else if w == nil {
 		w = &Worker{
 			pool: p,
@@ -226,4 +218,6 @@ func (p *Pool) putWorker(worker *Worker) {
 	p.lock.Lock()
 	p.workers = append(p.workers, worker)
 	p.lock.Unlock()
+	//通知有一个空闲的worker
+	p.cond.Signal()
 }