avoid race condition

xiaoqiangwang · Sep 26, 2016 · a2132a1 · a2132a1
1 parent 26baa13
commit a2132a1
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/gdd/gddAppTable.cc b/src/gdd/gddAppTable.cc
@@ -433,8 +433,10 @@ gddStatus gddApplicationTypeTable::freeDD(gdd* dd)
 		}
 
 		// fprintf(stderr,"Adding DD to free_list %d\n",app);
+		attr_table[group][app].sem.lock ();
 		dd->setNext(attr_table[group][app].free_list);
 		attr_table[group][app].free_list=dd;
+		attr_table[group][app].sem.unlock ();
 	}
 	else if (attr_table[group][app].type==gddApplicationTypeNormal)
 	{