From 4f164dcb2f61a3e192f7bfdb302adb8b2b7691c0 Mon Sep 17 00:00:00 2001
From: Jon Shallow <supjps-libcoap@jpshallow.com>
Date: Thu, 20 Jul 2023 14:32:48 +0100
Subject: [PATCH] coap_mutex_internal.h: Support LwIP ! NO_SYS mutexes

---
 include/coap3/coap_mutex_internal.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/coap3/coap_mutex_internal.h b/include/coap3/coap_mutex_internal.h
index 54caa036..5dad5a2d 100644
--- a/include/coap3/coap_mutex_internal.h
+++ b/include/coap3/coap_mutex_internal.h
@@ -60,6 +60,8 @@ typedef int coap_mutex_t;
 #else /* !NO SYS */
 #include <lwip/sys.h>
 typedef sys_mutex_t *coap_mutex_t;
+#define COAP_MUTEX_DEFINE(_name)                        \
+  static coap_mutex_t _name
 #define TOKENPASTE(x, y) x ## y
 #define TOKENPASTE2(x, y) TOKENPASTE(x, y)
 #define COAP_MUTEX_INITIALIZER (&TOKENPASTE2(coapMutexAt, __LINE__))