From d66583b54217702ca1c5d21da5f6abbf0469cd0d Mon Sep 17 00:00:00 2001
From: "Martine S. Lenders" <mail@martine-lenders.eu>
Date: Tue, 12 May 2020 14:01:30 +0200
Subject: [PATCH] gnrc_sock: re-issue MSG_RECV event if there are still
 received messages

... after `*_recv()` was called.

This prevents a client from needing to call `*_recv()` in a loop.
---
 sys/net/gnrc/sock/gnrc_sock.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sys/net/gnrc/sock/gnrc_sock.c b/sys/net/gnrc/sock/gnrc_sock.c
index a1c22d77f3..c6d0c21810 100644
--- a/sys/net/gnrc/sock/gnrc_sock.c
+++ b/sys/net/gnrc/sock/gnrc_sock.c
@@ -150,6 +150,11 @@ ssize_t gnrc_sock_recv(gnrc_sock_reg_t *reg, gnrc_pktsnip_t **pkt_out,
     }
     *pkt_out = pkt; /* set out parameter */
 
+#if IS_ACTIVE(SOCK_HAS_ASYNC)
+    if (reg->async_cb.generic && cib_avail(&reg->mbox.cib)) {
+        reg->async_cb.generic(reg, SOCK_ASYNC_MSG_RECV, reg->async_cb_arg);
+    }
+#endif
 #ifdef MODULE_FUZZING
     prevpkt = pkt;
 #endif