From 45b7ee826bb530eaae296c6c2dae0cc0081caa3d Mon Sep 17 00:00:00 2001
From: Mathieu Carbou <mathieu.carbou@gmail.com>
Date: Sun, 27 Oct 2024 08:37:58 +0100
Subject: [PATCH] Fix #27: Required to lock TCPIP core functionality

---
 src/AsyncTCP.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/AsyncTCP.cpp b/src/AsyncTCP.cpp
index c07c813..595ae2f 100644
--- a/src/AsyncTCP.cpp
+++ b/src/AsyncTCP.cpp
@@ -951,6 +951,7 @@ int8_t AsyncClient::_connected(tcp_pcb* pcb, int8_t err){
 
 void AsyncClient::_error(int8_t err) {
     if(_pcb){
+        TCP_MUTEX_LOCK();
         tcp_arg(_pcb, NULL);
         if(_pcb->state == LISTEN) {
             tcp_sent(_pcb, NULL);
@@ -958,6 +959,7 @@ void AsyncClient::_error(int8_t err) {
             tcp_err(_pcb, NULL);
             tcp_poll(_pcb, NULL, 0);
         }
+        TCP_MUTEX_UNLOCK();
         _free_closed_slot();
         _pcb = NULL;
     }