check RET in _join

2013-05-29 13:09:57 +09:00
parent 866461d13e
commit 48ccb4458d
2 changed files with 3 additions and 1 deletions
--- a/chopstx.c
+++ b/chopstx.c
@@ -1131,7 +1131,8 @@ chopstx_join (chopstx_t thd, void **ret)
    }

  tp->state = THREAD_FINISHED;
-  *ret = (void *)tp->tc.reg[0];
+  if (ret)
+    *ret = (void *)tp->tc.reg[0];
  asm volatile ("cpsie   i" : : : "memory");
 }