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-rw-r--r--src/threads/call_once.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/threads/call_once.c b/src/threads/call_once.c
index c09886ec..8757d200 100644
--- a/src/threads/call_once.c
+++ b/src/threads/call_once.c
@@ -9,6 +9,10 @@ void call_once(once_flag *flag, void (*func)(void))
pthread_once(flag, func);
}
+typedef void (*once_fn)(void);
+
+__vcheck_2(call_once, once_flag *, once_fn);
+
/*
STDC(201112)
*/