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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Component */
/** */
/** Transmission Control Protocol (TCP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_ip.h"
#include "nx_tcp.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_tcp_deferred_cleanup_check PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks for deferred cleanup processing, which is the */
/* case for all TCP socket timeout processing. This is done so that */
/* mutex protection can be obtained prior to processing the timeout. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer to IP control block */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _nx_tcp_client_bind_cleanup Bind cleanup */
/* _nx_tcp_connect_cleanup Connect cleanup */
/* _nx_tcp_disconnect_cleanup Disconnect cleanup */
/* _nx_tcp_receive_cleanup Receive cleanup */
/* _nx_tcp_transmit_cleanup Transmit cleanup */
/* */
/* CALLED BY */
/* */
/* _nx_ip_thread_entry IP helper thread */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Yuxin Zhou Initial Version 6.0 */
/* 09-30-2020 Yuxin Zhou Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
VOID _nx_tcp_deferred_cleanup_check(NX_IP *ip_ptr)
{
ULONG created_sockets;
ULONG suspended_threads;
NX_TCP_SOCKET *socket_ptr;
TX_THREAD *thread_ptr;
/* Pickup the first socket and the created count. */
socket_ptr = ip_ptr -> nx_ip_tcp_created_sockets_ptr;
created_sockets = ip_ptr -> nx_ip_tcp_created_sockets_count;
/* Loop through all created TCP sockets on the IP instance. */
while (created_sockets--)
{
/* Check the socket for deferred bind cleanup. */
suspended_threads = socket_ptr -> nx_tcp_socket_bind_suspended_count;
if (suspended_threads)
{
/* Pickup the socket pointer. */
thread_ptr = socket_ptr -> nx_tcp_socket_bind_suspension_list;
/* Loop through the suspended threads for the bind operation to determine if there
is a timeout. */
do
{
/* Determine if this thread has deferred the timeout processing. */
if (thread_ptr -> tx_thread_suspend_cleanup == _nx_tcp_cleanup_deferred)
{
/* Yes, call the cleanup routine again! */
_nx_tcp_client_bind_cleanup(thread_ptr NX_CLEANUP_ARGUMENT);
}
/* Move to next suspended thread. */
thread_ptr = thread_ptr -> tx_thread_suspended_next;
} while (--suspended_threads);
}
/* Check the socket for deferred connect cleanup. */
thread_ptr = socket_ptr -> nx_tcp_socket_connect_suspended_thread;
if (thread_ptr)
{
/* Determine if this thread has deferred the timeout processing. */
if (thread_ptr -> tx_thread_suspend_cleanup == _nx_tcp_cleanup_deferred)
{
/* Yes, call the cleanup routine again! */
_nx_tcp_connect_cleanup(thread_ptr NX_CLEANUP_ARGUMENT);
}
}
/* Check the socket for deferred disconnect cleanup. */
thread_ptr = socket_ptr -> nx_tcp_socket_disconnect_suspended_thread;
if (thread_ptr)
{
/* Determine if this thread has deferred the timeout processing. */
if (thread_ptr -> tx_thread_suspend_cleanup == _nx_tcp_cleanup_deferred)
{
/* Yes, call the cleanup routine again! */
_nx_tcp_disconnect_cleanup(thread_ptr NX_CLEANUP_ARGUMENT);
}
}
/* Check the socket for deferred receive cleanup. */
suspended_threads = socket_ptr -> nx_tcp_socket_receive_suspended_count;
if (suspended_threads)
{
/* Pickup the socket pointer. */
thread_ptr = socket_ptr -> nx_tcp_socket_receive_suspension_list;
/* Loop through the suspended threads for the receive operation to determine if there
is a timeout. */
do
{
/* Determine if this thread has deferred the timeout processing. */
if (thread_ptr -> tx_thread_suspend_cleanup == _nx_tcp_cleanup_deferred)
{
/* Yes, call the cleanup routine again! */
_nx_tcp_receive_cleanup(thread_ptr NX_CLEANUP_ARGUMENT);
}
/* Move to next suspended thread. */
thread_ptr = thread_ptr -> tx_thread_suspended_next;
} while (--suspended_threads);
}
/* Check the socket for deferred transmit cleanup. */
suspended_threads = socket_ptr -> nx_tcp_socket_transmit_suspended_count;
if (suspended_threads)
{
/* Pickup the socket pointer. */
thread_ptr = socket_ptr -> nx_tcp_socket_transmit_suspension_list;
/* Loop through the suspended threads for the transmit operation to determine if there
is a timeout. */
do
{
/* Determine if this thread has deferred the timeout processing. */
if (thread_ptr -> tx_thread_suspend_cleanup == _nx_tcp_cleanup_deferred)
{
/* Yes, call the cleanup routine again! */
_nx_tcp_transmit_cleanup(thread_ptr NX_CLEANUP_ARGUMENT);
}
/* Move to next suspended thread. */
thread_ptr = thread_ptr -> tx_thread_suspended_next;
} while (--suspended_threads);
}
/* Move to next created TCP socket. */
socket_ptr = socket_ptr -> nx_tcp_socket_created_next;
}
}