async: add guard (#474)

baresip · Aug 9, 2022 · 18fb840 · 18fb840
1 parent c2847b3
commit 18fb840
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/include/re_async.h b/include/re_async.h
@@ -4,6 +4,8 @@
  * Copyright (C) 2022 Sebastian Reimers
  */
 
+#ifndef RE_H_ASYNC__
+#define RE_H_ASYNC__
 struct re_async;
 
 typedef int (re_async_work_h)(void *arg);
@@ -12,3 +14,5 @@ typedef void (re_async_h)(int err, void *arg);
 int re_async_alloc(struct re_async **asyncp, uint16_t workers);
 int re_async(struct re_async *a, re_async_work_h *work, re_async_h *cb,
 	     void *arg);
+
+#endif