# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1560722222 -10800
# Node ID f92d4f05658703ff9aedd71b84543a62edd62e85
# Parent  e286454d305fb63dfc7b085c7e15ebe4754021a0
The return value of dmResourceRef() and dmResourceUnref() had a possibility
of being off by one due to a potential race condition. Fixed.

diff -r e286454d305f -r f92d4f056587 src/dmres.c
--- a/src/dmres.c	Mon Jun 17 00:55:07 2019 +0300
+++ b/src/dmres.c	Mon Jun 17 00:57:02 2019 +0300
@@ -1014,22 +1014,26 @@
 
 int dmResourceRef(DMResource *node)
 {
+    int res;
+
     dmLockLibMutex(node->lib);
     node->atime = time(NULL);
-    node->refcount++;
+    res = ++node->refcount;
     dmUnlockLibMutex(node->lib);
 
-    return node->refcount;
+    return res;
 }
 
 
 int dmResourceUnref(DMResource *node)
 {
+    int res;
+
     dmLockLibMutex(node->lib);
-    node->refcount--;
+    res = --node->refcount;
     dmUnlockLibMutex(node->lib);
 
-    return node->refcount;
+    return res;
 }