From 0bce6f89744cae3c9d9ec180531b35cac1616a4e Mon Sep 17 00:00:00 2001
From: davidhaas <davidhaas>
Date: Wed, 9 Apr 2003 20:12:12 +0000
Subject: [PATCH] Fixed bug where tearing down a connection would cause loss of
 memory.

---
 src/api/api_lib.c      | 4 ++--
 src/include/lwip/sys.h | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/api/api_lib.c b/src/api/api_lib.c
index e2d3e03d..602d0798 100644
--- a/src/api/api_lib.c
+++ b/src/api/api_lib.c
@@ -255,7 +255,7 @@ netconn_delete(struct netconn *conn)
 
   /* Drain the recvmbox. */
   if(conn->recvmbox != SYS_MBOX_NULL) {
-    while(sys_arch_mbox_fetch(conn->recvmbox, &mem, 1) != 0) {
+    while(sys_arch_mbox_fetch(conn->recvmbox, &mem, 1) != SYS_ARCH_TIMEOUT) {
       if(conn->type == NETCONN_TCP) {
 	pbuf_free((struct pbuf *)mem);
       } else {
@@ -269,7 +269,7 @@ netconn_delete(struct netconn *conn)
 
   /* Drain the acceptmbox. */
   if(conn->acceptmbox != SYS_MBOX_NULL) {
-    while(sys_arch_mbox_fetch(conn->acceptmbox, &mem, 1) != 0) {
+    while(sys_arch_mbox_fetch(conn->acceptmbox, &mem, 1) != SYS_ARCH_TIMEOUT) {
       netconn_delete((struct netconn *)mem);
     }
     
diff --git a/src/include/lwip/sys.h b/src/include/lwip/sys.h
index 94bc0790..88aea208 100644
--- a/src/include/lwip/sys.h
+++ b/src/include/lwip/sys.h
@@ -68,6 +68,9 @@ struct sys_timeout {u8_t dummy;};
 
 #include "arch/sys_arch.h"
 
+/** Return code for timeouts from sys_arch_mbox_fetch and sys_arch_sem_wait */
+#define SYS_ARCH_TIMEOUT 0xffffffff
+
 typedef void (* sys_timeout_handler)(void *arg);
 
 struct sys_timeout {