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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 */
/** */
/** Internet Protocol (IP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_ip.h"
#include "tx_timer.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_ip_fast_periodic_timer_entry PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function handles waking up the IP helper thread on a periodic */
/* basis for higher-frequency IPv6/TCP events. This timer is enabled */
/* when IPv6 or TCP is enabled. */
/* */
/* INPUT */
/* */
/* ip_address IP address in a ULONG */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* tx_event_flags_set Set event flags to wakeup */
/* IP helper thread */
/* */
/* CALLED BY */
/* */
/* ThreadX system timer 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 */
/* */
/**************************************************************************/
static VOID _nx_ip_fast_periodic_timer_entry(ULONG ip_address)
{
NX_IP *ip_ptr;
/* Setup IP pointer. */
NX_TIMER_EXTENSION_PTR_GET(ip_ptr, NX_IP, ip_address)
/* Wakeup this IP's helper thread. */
tx_event_flags_set(&(ip_ptr -> nx_ip_events), NX_IP_FAST_EVENT, TX_OR);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_ip_fast_periodic_timer_create PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function creates a high resolution timer for driving IPv6 and */
/* TCP time-keeping events. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer into IP instance. */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* tx_timer_create Set event flags to wakeup */
/* IP helper thread */
/* */
/* CALLED BY */
/* */
/* nx_ipv6_enable */
/* nx_tcp_enable */
/* */
/* 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_ip_fast_periodic_timer_create(NX_IP *ip_ptr)
{
ULONG _nx_ip_fast_timer_rate;
if (ip_ptr -> nx_ip_fast_periodic_timer_created)
{
return;
}
_nx_ip_fast_timer_rate = (NX_IP_PERIODIC_RATE + (NX_IP_FAST_TIMER_RATE - 1)) / NX_IP_FAST_TIMER_RATE;
/* Create the fast TCP timer. */
/*lint -e{923} suppress cast of pointer to ULONG. */
tx_timer_create(&(ip_ptr -> nx_ip_fast_periodic_timer), ip_ptr -> nx_ip_name,
_nx_ip_fast_periodic_timer_entry, (ULONG)(ALIGN_TYPE)ip_ptr,
_nx_ip_fast_timer_rate, _nx_ip_fast_timer_rate, TX_AUTO_ACTIVATE);
NX_TIMER_EXTENSION_PTR_SET(&(ip_ptr -> nx_ip_fast_periodic_timer), ip_ptr)
/* Set the flag to indicate that the fast timer has been created. */
ip_ptr -> nx_ip_fast_periodic_timer_created = 1;
}