From 67aa96b957763bf156ea9f3bac5366ad813d11da Mon Sep 17 00:00:00 2001
From: Ambroz Bizjak <ambroz.bizjak@cosylab.com>
Date: Tue, 18 Aug 2015 15:51:38 -0400
Subject: [PATCH] freeListItemsAvail.patch from lp:1479316

---
 src/libCom/freeList/freeListLib.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/libCom/freeList/freeListLib.c b/src/libCom/freeList/freeListLib.c
index 3ddd1331c..5e07ba9c3 100644
--- a/src/libCom/freeList/freeListLib.c
+++ b/src/libCom/freeList/freeListLib.c
@@ -148,6 +148,10 @@ epicsShareFunc void epicsShareAPI freeListCleanup(void *pvt)
 epicsShareFunc size_t epicsShareAPI freeListItemsAvail(void *pvt)
 {
     FREELISTPVT *pfl = pvt;
-    return pfl->nBlocksAvailable;
+    size_t nBlocksAvailable;
+    epicsMutexMustLock(pfl->lock);
+    nBlocksAvailable = pfl->nBlocksAvailable;
+    epicsMutexUnlock(pfl->lock);
+    return nBlocksAvailable;
 }