Fixed compilation for LWIP_DNS==1 after changing sys layer

src/api/api_lib.c

@@ -620,19 +620,19 @@ netconn_gethostbyname(const char *name, ip_addr_t *addr)
   LWIP_ERROR("netconn_gethostbyname: invalid name", (name != NULL), return ERR_ARG;);
   LWIP_ERROR("netconn_gethostbyname: invalid addr", (addr != NULL), return ERR_ARG;);
 
-  sem = sys_sem_new(0);
-  if (sem == SYS_SEM_NULL) {
-    return ERR_MEM;
+  err = sys_sem_new(&sem, 0);
+  if (err != ERR_OK) {
+    return err;
   }
 
   msg.name = name;
   msg.addr = addr;
   msg.err = &err;
-  msg.sem = sem;
+  msg.sem = &sem;
 
   tcpip_callback(do_gethostbyname, &msg);
-  sys_sem_wait(sem);
-  sys_sem_free(sem);
+  sys_sem_wait(&sem);
+  sys_sem_free(&sem);
 
   return err;
 }

src/api/api_msg.c

@@ -1412,7 +1412,7 @@ do_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
     *msg->addr = *ipaddr;
   }
   /* wake up the application task waiting in netconn_gethostbyname */
-  sys_sem_signal(&msg->sem);
+  sys_sem_signal(msg->sem);
 }
 
 /**
@@ -1430,7 +1430,7 @@ do_gethostbyname(void *arg)
   if (*msg->err != ERR_INPROGRESS) {
     /* on error or immediate success, wake up the application
      * task waiting in netconn_gethostbyname */
-    sys_sem_signal(&msg->sem);
+    sys_sem_signal(msg->sem);
   }
 }
 #endif /* LWIP_DNS */

src/include/lwip/api_msg.h

@@ -127,7 +127,7 @@ struct dns_api_msg {
   ip_addr_t *addr;
   /** This semaphore is posted when the name is resolved, the application thread
       should wait on it. */
-  sys_sem_t sem;
+  sys_sem_t *sem;
   /** Errors are given back here */
   err_t *err;
 };