From 7cc1dd1985b2a30f0805db9b7a539bdf3b2ef212 Mon Sep 17 00:00:00 2001
From: Jack Christensen <jack@jackchristensen.com>
Date: Thu, 2 Apr 2020 22:11:22 -0500
Subject: [PATCH] CreateResource checks if pool is closed before any action

---
 pool.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pool.go b/pool.go
index 262e110..b5003cc 100644
--- a/pool.go
+++ b/pool.go
@@ -381,6 +381,12 @@ func (p *Pool) AcquireAllIdle() []*Resource {
 // It goes straight in the IdlePool. It does not check against maxSize.
 // It can be useful to maintain warm resources under little load.
 func (p *Pool) CreateResource(ctx context.Context) error {
+	p.cond.L.Lock()
+	if p.closed {
+		p.cond.L.Unlock()
+		return ErrClosedPool
+	}
+	p.cond.L.Unlock()
 
 	value, err := p.constructResourceValue(ctx)
 	if err != nil {