lwip_timers_140.c File Reference

Stack-internal timers implementation.

This file includes timer callbacks for stack-internal timers as well as functions to set up or stop timers and check for expired timers.

#include "lwip/opt.h"
#include "lwip/timers.h"
#include "lwip/tcp_impl.h"
#include "lwip/def.h"
#include "lwip/memp.h"
#include "lwip/tcpip.h"
#include "lwip/ip_frag.h"
#include "netif/etharp.h"
#include "lwip/dhcp.h"
#include "lwip/autoip.h"
#include "lwip/igmp.h"
#include "lwip/dns.h"

Functions
static void	arp_timer (void *arg)
	Timer callback function that calls etharp_tmr() and reschedules itself. More...
	if (timeout==NULL)
	if (next_timeout==NULL)
	if (next_timeout->time > msecs)
void	sys_timeouts_init (void)
	Initialize this module. More...
void	tcp_timer_needed (void)
	Called from TCP_REG when registering a new PCB: the reason is to have the TCP timer only running when there are active (or time-wait) PCBs. More...
static void	tcpip_tcp_timer (void *arg)
	Timer callback function that calls tcp_tmr() and reschedules itself. More...

Variables
timeout	arg = arg
timeout	h = handler
timeout	next = NULL
static struct sys_timeo *	next_timeout
	The one and only timeout list. More...
static int	tcpip_tcp_timer_active
	global variable that shows if the tcp timer is currently scheduled or not More...
timeout	time = msecs
	timeout = (struct sys_timeo *)memp_malloc(MEMP_SYS_TIMEOUT)
	void
	Create a one-shot timer (aka timeout). More...

static void arp_timer ( void *  arg )

static

Timer callback function that calls etharp_tmr() and reschedules itself.

Parameters

arg	unused argument

References ARP_TMR_INTERVAL, etharp_tmr(), LWIP_DEBUGF, LWIP_UNUSED_ARG, NULL, sys_timeout(), and TIMERS_DEBUG.

Referenced by sys_timeouts_init().

if

(

timeout

= = NULL

)

References LWIP_ASSERT, and NULL.

Referenced by do_writemore(), etharp_query(), flashc_memset64(), host_read_p_rxpacket(), icmp_input(), ip_frag(), ip_input(), lwip_ioctl(), pbuf_header(), tcp_zero_window_probe(), and usb_read_ep_rxpacket().

if

(

next_timeout

= = NULL

)

References timeout.

if	(	next_timeout->	time,
		msecs
	)

References sys_timeo::next, next_timeout, sys_timeo::time, and timeout.

void sys_timeouts_init

(

void

)

Initialize this module.

References arp_timer(), ARP_TMR_INTERVAL, NULL, sys_now(), and sys_timeout().

Referenced by lwip_init().

void tcp_timer_needed

(

void

)

Called from TCP_REG when registering a new PCB: the reason is to have the TCP timer only running when there are active (or time-wait) PCBs.

External function (implemented in timers.c), called when TCP detects that a timer is needed (i.e.

References NULL, sys_timeout(), tcp_active_pcbs, TCP_TMR_INTERVAL, tcp_tw_pcbs, tcpip_tcp_timer(), and tcpip_tcp_timer_active.

static void tcpip_tcp_timer ( void *  arg )

static

Timer callback function that calls tcp_tmr() and reschedules itself.

Parameters

arg	unused argument

References LWIP_UNUSED_ARG, NULL, sys_timeout(), tcp_active_pcbs, tcp_tmr(), TCP_TMR_INTERVAL, tcp_tw_pcbs, and tcpip_tcp_timer_active.

Referenced by tcp_timer_needed().

timeout arg = arg

Referenced by dip204_printf_string(), tcp_arg(), tcpip_init(), tcpip_timeout(), and tcpip_untimeout().

timeout h = handler

Referenced by tcpip_timeout(), and tcpip_untimeout().

timeout next = NULL

Referenced by mem_malloc(), mem_trim(), netif_set_ipaddr(), tcp_fasttmr(), tcp_oos_insert_segment(), tcp_receive(), and tcp_segs_free().

struct sys_timeo* next_timeout

static

The one and only timeout list.

Referenced by if().

int tcpip_tcp_timer_active

static

global variable that shows if the tcp timer is currently scheduled or not

Referenced by tcp_timer_needed(), and tcpip_tcp_timer().

timeout time = msecs

timeout = (struct sys_timeo *)memp_malloc(MEMP_SYS_TIMEOUT)

Referenced by if(), spi_read(), spi_unselectChip(), spi_variableSlaveWrite(), spi_write(), and usb_general_interrupt_non_naked().

void

Initial value:

{
  struct sys_timeo *timeout, *t

Create a one-shot timer (aka timeout).

Timeouts are processed in the following cases:

• while waiting for a message using sys_timeouts_mbox_fetch()
• by calling sys_check_timeouts() (NO_SYS==1 only)

Parameters

msecs	time in milliseconds after that the timer should expire
handler	callback function to call when msecs have elapsed
arg	argument to pass to the callback function

Referenced by host_check_class(), host_disable_all_pipes(), host_get_data(), host_send_data(), host_transfer_control(), low_level_input(), low_level_output(), portTASK_FUNCTION(), prvInitialiseTCBVariables(), pxdatalog_log_alloc_init(), usb_device_task_init(), usb_general_interrupt_non_naked(), usb_host_task(), usb_host_task_init(), usb_set_feature(), usb_user_endpoint_init(), xQueueGenericReceive(), and xQueueGenericSend().