gnrc_sock: warn about non-zero receive timeouts with sock_async

RIOT-OS · May 24, 2022 · 4e88b75 · 4e88b75
1 parent d43ad76
commit 4e88b75
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/sys/net/gnrc/sock/gnrc_sock.c b/sys/net/gnrc/sock/gnrc_sock.c
@@ -132,6 +132,14 @@ ssize_t gnrc_sock_recv(gnrc_sock_reg_t *reg, gnrc_pktsnip_t **pkt_out,
     }
 #endif
     if (timeout != 0) {
+#if defined(DEVELHELP) && IS_ACTIVE(SOCK_HAS_ASYNC)
+        if (reg->async_cb.generic) {
+            /* this warning is a false positive when sock_*_recv() was not called from
+             * the asynchronous handler */
+            LOG_WARNING("gnrc_sock: timeout != 0 within the asynchronous callback lead "
+                        "to unexpected delays within the asynchronous handler.\n");
+        }
+#endif
         mbox_get(&reg->mbox, &msg);
     }
     else {