async: add guard
* 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
