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lwip/core/timers.c@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:
grzemich
Date:
Wed Dec 07 23:47:50 2016 +0000
Revision:
0:d7bd7384a37c
dgd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grzemich 0:d7bd7384a37c 1 /**
grzemich 0:d7bd7384a37c 2 * @file
grzemich 0:d7bd7384a37c 3 * Stack-internal timers implementation.
grzemich 0:d7bd7384a37c 4 * This file includes timer callbacks for stack-internal timers as well as
grzemich 0:d7bd7384a37c 5 * functions to set up or stop timers and check for expired timers.
grzemich 0:d7bd7384a37c 6 *
grzemich 0:d7bd7384a37c 7 */
grzemich 0:d7bd7384a37c 8
grzemich 0:d7bd7384a37c 9 /*
grzemich 0:d7bd7384a37c 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
grzemich 0:d7bd7384a37c 11 * All rights reserved.
grzemich 0:d7bd7384a37c 12 *
grzemich 0:d7bd7384a37c 13 * Redistribution and use in source and binary forms, with or without modification,
grzemich 0:d7bd7384a37c 14 * are permitted provided that the following conditions are met:
grzemich 0:d7bd7384a37c 15 *
grzemich 0:d7bd7384a37c 16 * 1. Redistributions of source code must retain the above copyright notice,
grzemich 0:d7bd7384a37c 17 * this list of conditions and the following disclaimer.
grzemich 0:d7bd7384a37c 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
grzemich 0:d7bd7384a37c 19 * this list of conditions and the following disclaimer in the documentation
grzemich 0:d7bd7384a37c 20 * and/or other materials provided with the distribution.
grzemich 0:d7bd7384a37c 21 * 3. The name of the author may not be used to endorse or promote products
grzemich 0:d7bd7384a37c 22 * derived from this software without specific prior written permission.
grzemich 0:d7bd7384a37c 23 *
grzemich 0:d7bd7384a37c 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
grzemich 0:d7bd7384a37c 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
grzemich 0:d7bd7384a37c 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
grzemich 0:d7bd7384a37c 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
grzemich 0:d7bd7384a37c 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
grzemich 0:d7bd7384a37c 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
grzemich 0:d7bd7384a37c 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
grzemich 0:d7bd7384a37c 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
grzemich 0:d7bd7384a37c 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
grzemich 0:d7bd7384a37c 33 * OF SUCH DAMAGE.
grzemich 0:d7bd7384a37c 34 *
grzemich 0:d7bd7384a37c 35 * This file is part of the lwIP TCP/IP stack.
grzemich 0:d7bd7384a37c 36 *
grzemich 0:d7bd7384a37c 37 * Author: Adam Dunkels <adam@sics.se>
grzemich 0:d7bd7384a37c 38 * Simon Goldschmidt
grzemich 0:d7bd7384a37c 39 *
grzemich 0:d7bd7384a37c 40 */
grzemich 0:d7bd7384a37c 41
grzemich 0:d7bd7384a37c 42 #include "lwip/opt.h"
grzemich 0:d7bd7384a37c 43
grzemich 0:d7bd7384a37c 44 #include "lwip/timers.h"
grzemich 0:d7bd7384a37c 45 #include "lwip/tcp_impl.h"
grzemich 0:d7bd7384a37c 46
grzemich 0:d7bd7384a37c 47 #if LWIP_TIMERS
grzemich 0:d7bd7384a37c 48
grzemich 0:d7bd7384a37c 49 #include "lwip/def.h"
grzemich 0:d7bd7384a37c 50 #include "lwip/memp.h"
grzemich 0:d7bd7384a37c 51 #include "lwip/tcpip.h"
grzemich 0:d7bd7384a37c 52
grzemich 0:d7bd7384a37c 53 #include "lwip/ip_frag.h"
grzemich 0:d7bd7384a37c 54 #include "netif/etharp.h"
grzemich 0:d7bd7384a37c 55 #include "lwip/dhcp.h"
grzemich 0:d7bd7384a37c 56 #include "lwip/autoip.h"
grzemich 0:d7bd7384a37c 57 #include "lwip/igmp.h"
grzemich 0:d7bd7384a37c 58 #include "lwip/dns.h"
grzemich 0:d7bd7384a37c 59
grzemich 0:d7bd7384a37c 60
grzemich 0:d7bd7384a37c 61 /** The one and only timeout list */
grzemich 0:d7bd7384a37c 62 static struct sys_timeo *next_timeout;
grzemich 0:d7bd7384a37c 63 #if NO_SYS
grzemich 0:d7bd7384a37c 64 static u32_t timeouts_last_time;
grzemich 0:d7bd7384a37c 65 #endif /* NO_SYS */
grzemich 0:d7bd7384a37c 66
grzemich 0:d7bd7384a37c 67 #if LWIP_TCP
grzemich 0:d7bd7384a37c 68 /** global variable that shows if the tcp timer is currently scheduled or not */
grzemich 0:d7bd7384a37c 69 static int tcpip_tcp_timer_active;
grzemich 0:d7bd7384a37c 70
grzemich 0:d7bd7384a37c 71 /**
grzemich 0:d7bd7384a37c 72 * Timer callback function that calls tcp_tmr() and reschedules itself.
grzemich 0:d7bd7384a37c 73 *
grzemich 0:d7bd7384a37c 74 * @param arg unused argument
grzemich 0:d7bd7384a37c 75 */
grzemich 0:d7bd7384a37c 76 static void
grzemich 0:d7bd7384a37c 77 tcpip_tcp_timer(void *arg)
grzemich 0:d7bd7384a37c 78 {
grzemich 0:d7bd7384a37c 79 LWIP_UNUSED_ARG(arg);
grzemich 0:d7bd7384a37c 80
grzemich 0:d7bd7384a37c 81 /* call TCP timer handler */
grzemich 0:d7bd7384a37c 82 tcp_tmr();
grzemich 0:d7bd7384a37c 83 /* timer still needed? */
grzemich 0:d7bd7384a37c 84 if (tcp_active_pcbs || tcp_tw_pcbs) {
grzemich 0:d7bd7384a37c 85 /* restart timer */
grzemich 0:d7bd7384a37c 86 sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
grzemich 0:d7bd7384a37c 87 } else {
grzemich 0:d7bd7384a37c 88 /* disable timer */
grzemich 0:d7bd7384a37c 89 tcpip_tcp_timer_active = 0;
grzemich 0:d7bd7384a37c 90 }
grzemich 0:d7bd7384a37c 91 }
grzemich 0:d7bd7384a37c 92
grzemich 0:d7bd7384a37c 93 /**
grzemich 0:d7bd7384a37c 94 * Called from TCP_REG when registering a new PCB:
grzemich 0:d7bd7384a37c 95 * the reason is to have the TCP timer only running when
grzemich 0:d7bd7384a37c 96 * there are active (or time-wait) PCBs.
grzemich 0:d7bd7384a37c 97 */
grzemich 0:d7bd7384a37c 98 void
grzemich 0:d7bd7384a37c 99 tcp_timer_needed(void)
grzemich 0:d7bd7384a37c 100 {
grzemich 0:d7bd7384a37c 101 /* timer is off but needed again? */
grzemich 0:d7bd7384a37c 102 if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) {
grzemich 0:d7bd7384a37c 103 /* enable and start timer */
grzemich 0:d7bd7384a37c 104 tcpip_tcp_timer_active = 1;
grzemich 0:d7bd7384a37c 105 sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
grzemich 0:d7bd7384a37c 106 }
grzemich 0:d7bd7384a37c 107 }
grzemich 0:d7bd7384a37c 108 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 109
grzemich 0:d7bd7384a37c 110 #if IP_REASSEMBLY
grzemich 0:d7bd7384a37c 111 /**
grzemich 0:d7bd7384a37c 112 * Timer callback function that calls ip_reass_tmr() and reschedules itself.
grzemich 0:d7bd7384a37c 113 *
grzemich 0:d7bd7384a37c 114 * @param arg unused argument
grzemich 0:d7bd7384a37c 115 */
grzemich 0:d7bd7384a37c 116 static void
grzemich 0:d7bd7384a37c 117 ip_reass_timer(void *arg)
grzemich 0:d7bd7384a37c 118 {
grzemich 0:d7bd7384a37c 119 LWIP_UNUSED_ARG(arg);
grzemich 0:d7bd7384a37c 120 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: ip_reass_tmr()\n"));
grzemich 0:d7bd7384a37c 121 ip_reass_tmr();
grzemich 0:d7bd7384a37c 122 sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
grzemich 0:d7bd7384a37c 123 }
grzemich 0:d7bd7384a37c 124 #endif /* IP_REASSEMBLY */
grzemich 0:d7bd7384a37c 125
grzemich 0:d7bd7384a37c 126 #if LWIP_ARP
grzemich 0:d7bd7384a37c 127 /**
grzemich 0:d7bd7384a37c 128 * Timer callback function that calls etharp_tmr() and reschedules itself.
grzemich 0:d7bd7384a37c 129 *
grzemich 0:d7bd7384a37c 130 * @param arg unused argument
grzemich 0:d7bd7384a37c 131 */
grzemich 0:d7bd7384a37c 132 static void
grzemich 0:d7bd7384a37c 133 arp_timer(void *arg)
grzemich 0:d7bd7384a37c 134 {
grzemich 0:d7bd7384a37c 135 LWIP_UNUSED_ARG(arg);
grzemich 0:d7bd7384a37c 136 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: etharp_tmr()\n"));
grzemich 0:d7bd7384a37c 137 etharp_tmr();
grzemich 0:d7bd7384a37c 138 sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
grzemich 0:d7bd7384a37c 139 }
grzemich 0:d7bd7384a37c 140 #endif /* LWIP_ARP */
grzemich 0:d7bd7384a37c 141
grzemich 0:d7bd7384a37c 142 #if LWIP_DHCP
grzemich 0:d7bd7384a37c 143 /**
grzemich 0:d7bd7384a37c 144 * Timer callback function that calls dhcp_coarse_tmr() and reschedules itself.
grzemich 0:d7bd7384a37c 145 *
grzemich 0:d7bd7384a37c 146 * @param arg unused argument
grzemich 0:d7bd7384a37c 147 */
grzemich 0:d7bd7384a37c 148 static void
grzemich 0:d7bd7384a37c 149 dhcp_timer_coarse(void *arg)
grzemich 0:d7bd7384a37c 150 {
grzemich 0:d7bd7384a37c 151 LWIP_UNUSED_ARG(arg);
grzemich 0:d7bd7384a37c 152 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dhcp_coarse_tmr()\n"));
grzemich 0:d7bd7384a37c 153 dhcp_coarse_tmr();
grzemich 0:d7bd7384a37c 154 sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
grzemich 0:d7bd7384a37c 155 }
grzemich 0:d7bd7384a37c 156
grzemich 0:d7bd7384a37c 157 /**
grzemich 0:d7bd7384a37c 158 * Timer callback function that calls dhcp_fine_tmr() and reschedules itself.
grzemich 0:d7bd7384a37c 159 *
grzemich 0:d7bd7384a37c 160 * @param arg unused argument
grzemich 0:d7bd7384a37c 161 */
grzemich 0:d7bd7384a37c 162 static void
grzemich 0:d7bd7384a37c 163 dhcp_timer_fine(void *arg)
grzemich 0:d7bd7384a37c 164 {
grzemich 0:d7bd7384a37c 165 LWIP_UNUSED_ARG(arg);
grzemich 0:d7bd7384a37c 166 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dhcp_fine_tmr()\n"));
grzemich 0:d7bd7384a37c 167 dhcp_fine_tmr();
grzemich 0:d7bd7384a37c 168 sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
grzemich 0:d7bd7384a37c 169 }
grzemich 0:d7bd7384a37c 170 #endif /* LWIP_DHCP */
grzemich 0:d7bd7384a37c 171
grzemich 0:d7bd7384a37c 172 #if LWIP_AUTOIP
grzemich 0:d7bd7384a37c 173 /**
grzemich 0:d7bd7384a37c 174 * Timer callback function that calls autoip_tmr() and reschedules itself.
grzemich 0:d7bd7384a37c 175 *
grzemich 0:d7bd7384a37c 176 * @param arg unused argument
grzemich 0:d7bd7384a37c 177 */
grzemich 0:d7bd7384a37c 178 static void
grzemich 0:d7bd7384a37c 179 autoip_timer(void *arg)
grzemich 0:d7bd7384a37c 180 {
grzemich 0:d7bd7384a37c 181 LWIP_UNUSED_ARG(arg);
grzemich 0:d7bd7384a37c 182 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: autoip_tmr()\n"));
grzemich 0:d7bd7384a37c 183 autoip_tmr();
grzemich 0:d7bd7384a37c 184 sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL);
grzemich 0:d7bd7384a37c 185 }
grzemich 0:d7bd7384a37c 186 #endif /* LWIP_AUTOIP */
grzemich 0:d7bd7384a37c 187
grzemich 0:d7bd7384a37c 188 #if LWIP_IGMP
grzemich 0:d7bd7384a37c 189 /**
grzemich 0:d7bd7384a37c 190 * Timer callback function that calls igmp_tmr() and reschedules itself.
grzemich 0:d7bd7384a37c 191 *
grzemich 0:d7bd7384a37c 192 * @param arg unused argument
grzemich 0:d7bd7384a37c 193 */
grzemich 0:d7bd7384a37c 194 static void
grzemich 0:d7bd7384a37c 195 igmp_timer(void *arg)
grzemich 0:d7bd7384a37c 196 {
grzemich 0:d7bd7384a37c 197 LWIP_UNUSED_ARG(arg);
grzemich 0:d7bd7384a37c 198 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: igmp_tmr()\n"));
grzemich 0:d7bd7384a37c 199 igmp_tmr();
grzemich 0:d7bd7384a37c 200 sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
grzemich 0:d7bd7384a37c 201 }
grzemich 0:d7bd7384a37c 202 #endif /* LWIP_IGMP */
grzemich 0:d7bd7384a37c 203
grzemich 0:d7bd7384a37c 204 #if LWIP_DNS
grzemich 0:d7bd7384a37c 205 /**
grzemich 0:d7bd7384a37c 206 * Timer callback function that calls dns_tmr() and reschedules itself.
grzemich 0:d7bd7384a37c 207 *
grzemich 0:d7bd7384a37c 208 * @param arg unused argument
grzemich 0:d7bd7384a37c 209 */
grzemich 0:d7bd7384a37c 210 static void
grzemich 0:d7bd7384a37c 211 dns_timer(void *arg)
grzemich 0:d7bd7384a37c 212 {
grzemich 0:d7bd7384a37c 213 LWIP_UNUSED_ARG(arg);
grzemich 0:d7bd7384a37c 214 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dns_tmr()\n"));
grzemich 0:d7bd7384a37c 215 dns_tmr();
grzemich 0:d7bd7384a37c 216 sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL);
grzemich 0:d7bd7384a37c 217 }
grzemich 0:d7bd7384a37c 218 #endif /* LWIP_DNS */
grzemich 0:d7bd7384a37c 219
grzemich 0:d7bd7384a37c 220 /** Initialize this module */
grzemich 0:d7bd7384a37c 221 void sys_timeouts_init(void)
grzemich 0:d7bd7384a37c 222 {
grzemich 0:d7bd7384a37c 223 #if IP_REASSEMBLY
grzemich 0:d7bd7384a37c 224 sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
grzemich 0:d7bd7384a37c 225 #endif /* IP_REASSEMBLY */
grzemich 0:d7bd7384a37c 226 #if LWIP_ARP
grzemich 0:d7bd7384a37c 227 sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
grzemich 0:d7bd7384a37c 228 #endif /* LWIP_ARP */
grzemich 0:d7bd7384a37c 229 #if LWIP_DHCP
grzemich 0:d7bd7384a37c 230 sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
grzemich 0:d7bd7384a37c 231 sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
grzemich 0:d7bd7384a37c 232 #endif /* LWIP_DHCP */
grzemich 0:d7bd7384a37c 233 #if LWIP_AUTOIP
grzemich 0:d7bd7384a37c 234 sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL);
grzemich 0:d7bd7384a37c 235 #endif /* LWIP_AUTOIP */
grzemich 0:d7bd7384a37c 236 #if LWIP_IGMP
grzemich 0:d7bd7384a37c 237 sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
grzemich 0:d7bd7384a37c 238 #endif /* LWIP_IGMP */
grzemich 0:d7bd7384a37c 239 #if LWIP_DNS
grzemich 0:d7bd7384a37c 240 sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL);
grzemich 0:d7bd7384a37c 241 #endif /* LWIP_DNS */
grzemich 0:d7bd7384a37c 242
grzemich 0:d7bd7384a37c 243 #if NO_SYS
grzemich 0:d7bd7384a37c 244 /* Initialise timestamp for sys_check_timeouts */
grzemich 0:d7bd7384a37c 245 timeouts_last_time = sys_now();
grzemich 0:d7bd7384a37c 246 #endif
grzemich 0:d7bd7384a37c 247 }
grzemich 0:d7bd7384a37c 248
grzemich 0:d7bd7384a37c 249 /**
grzemich 0:d7bd7384a37c 250 * Create a one-shot timer (aka timeout). Timeouts are processed in the
grzemich 0:d7bd7384a37c 251 * following cases:
grzemich 0:d7bd7384a37c 252 * - while waiting for a message using sys_timeouts_mbox_fetch()
grzemich 0:d7bd7384a37c 253 * - by calling sys_check_timeouts() (NO_SYS==1 only)
grzemich 0:d7bd7384a37c 254 *
grzemich 0:d7bd7384a37c 255 * @param msecs time in milliseconds after that the timer should expire
grzemich 0:d7bd7384a37c 256 * @param handler callback function to call when msecs have elapsed
grzemich 0:d7bd7384a37c 257 * @param arg argument to pass to the callback function
grzemich 0:d7bd7384a37c 258 */
grzemich 0:d7bd7384a37c 259 #if LWIP_DEBUG_TIMERNAMES
grzemich 0:d7bd7384a37c 260 void
grzemich 0:d7bd7384a37c 261 sys_timeout_debug(u32_t msecs, sys_timeout_handler handler, void *arg, const char* handler_name)
grzemich 0:d7bd7384a37c 262 #else /* LWIP_DEBUG_TIMERNAMES */
grzemich 0:d7bd7384a37c 263 void
grzemich 0:d7bd7384a37c 264 sys_timeout(u32_t msecs, sys_timeout_handler handler, void *arg)
grzemich 0:d7bd7384a37c 265 #endif /* LWIP_DEBUG_TIMERNAMES */
grzemich 0:d7bd7384a37c 266 {
grzemich 0:d7bd7384a37c 267 struct sys_timeo *timeout, *t;
grzemich 0:d7bd7384a37c 268
grzemich 0:d7bd7384a37c 269 timeout = (struct sys_timeo *)memp_malloc(MEMP_SYS_TIMEOUT);
grzemich 0:d7bd7384a37c 270 if (timeout == NULL) {
grzemich 0:d7bd7384a37c 271 LWIP_ASSERT("sys_timeout: timeout != NULL, pool MEMP_SYS_TIMEOUT is empty", timeout != NULL);
grzemich 0:d7bd7384a37c 272 return;
grzemich 0:d7bd7384a37c 273 }
grzemich 0:d7bd7384a37c 274 timeout->next = NULL;
grzemich 0:d7bd7384a37c 275 timeout->h = handler;
grzemich 0:d7bd7384a37c 276 timeout->arg = arg;
grzemich 0:d7bd7384a37c 277 timeout->time = msecs;
grzemich 0:d7bd7384a37c 278 #if LWIP_DEBUG_TIMERNAMES
grzemich 0:d7bd7384a37c 279 timeout->handler_name = handler_name;
grzemich 0:d7bd7384a37c 280 LWIP_DEBUGF(TIMERS_DEBUG, ("sys_timeout: %p msecs=%"U32_F" handler=%s arg=%p\n",
grzemich 0:d7bd7384a37c 281 (void *)timeout, msecs, handler_name, (void *)arg));
grzemich 0:d7bd7384a37c 282 #endif /* LWIP_DEBUG_TIMERNAMES */
grzemich 0:d7bd7384a37c 283
grzemich 0:d7bd7384a37c 284 if (next_timeout == NULL) {
grzemich 0:d7bd7384a37c 285 next_timeout = timeout;
grzemich 0:d7bd7384a37c 286 return;
grzemich 0:d7bd7384a37c 287 }
grzemich 0:d7bd7384a37c 288
grzemich 0:d7bd7384a37c 289 if (next_timeout->time > msecs) {
grzemich 0:d7bd7384a37c 290 next_timeout->time -= msecs;
grzemich 0:d7bd7384a37c 291 timeout->next = next_timeout;
grzemich 0:d7bd7384a37c 292 next_timeout = timeout;
grzemich 0:d7bd7384a37c 293 } else {
grzemich 0:d7bd7384a37c 294 for(t = next_timeout; t != NULL; t = t->next) {
grzemich 0:d7bd7384a37c 295 timeout->time -= t->time;
grzemich 0:d7bd7384a37c 296 if (t->next == NULL || t->next->time > timeout->time) {
grzemich 0:d7bd7384a37c 297 if (t->next != NULL) {
grzemich 0:d7bd7384a37c 298 t->next->time -= timeout->time;
grzemich 0:d7bd7384a37c 299 }
grzemich 0:d7bd7384a37c 300 timeout->next = t->next;
grzemich 0:d7bd7384a37c 301 t->next = timeout;
grzemich 0:d7bd7384a37c 302 break;
grzemich 0:d7bd7384a37c 303 }
grzemich 0:d7bd7384a37c 304 }
grzemich 0:d7bd7384a37c 305 }
grzemich 0:d7bd7384a37c 306 }
grzemich 0:d7bd7384a37c 307
grzemich 0:d7bd7384a37c 308 /**
grzemich 0:d7bd7384a37c 309 * Go through timeout list (for this task only) and remove the first matching
grzemich 0:d7bd7384a37c 310 * entry, even though the timeout has not triggered yet.
grzemich 0:d7bd7384a37c 311 *
grzemich 0:d7bd7384a37c 312 * @note This function only works as expected if there is only one timeout
grzemich 0:d7bd7384a37c 313 * calling 'handler' in the list of timeouts.
grzemich 0:d7bd7384a37c 314 *
grzemich 0:d7bd7384a37c 315 * @param handler callback function that would be called by the timeout
grzemich 0:d7bd7384a37c 316 * @param arg callback argument that would be passed to handler
grzemich 0:d7bd7384a37c 317 */
grzemich 0:d7bd7384a37c 318 void
grzemich 0:d7bd7384a37c 319 sys_untimeout(sys_timeout_handler handler, void *arg)
grzemich 0:d7bd7384a37c 320 {
grzemich 0:d7bd7384a37c 321 struct sys_timeo *prev_t, *t;
grzemich 0:d7bd7384a37c 322
grzemich 0:d7bd7384a37c 323 if (next_timeout == NULL) {
grzemich 0:d7bd7384a37c 324 return;
grzemich 0:d7bd7384a37c 325 }
grzemich 0:d7bd7384a37c 326
grzemich 0:d7bd7384a37c 327 for (t = next_timeout, prev_t = NULL; t != NULL; prev_t = t, t = t->next) {
grzemich 0:d7bd7384a37c 328 if ((t->h == handler) && (t->arg == arg)) {
grzemich 0:d7bd7384a37c 329 /* We have a match */
grzemich 0:d7bd7384a37c 330 /* Unlink from previous in list */
grzemich 0:d7bd7384a37c 331 if (prev_t == NULL) {
grzemich 0:d7bd7384a37c 332 next_timeout = t->next;
grzemich 0:d7bd7384a37c 333 } else {
grzemich 0:d7bd7384a37c 334 prev_t->next = t->next;
grzemich 0:d7bd7384a37c 335 }
grzemich 0:d7bd7384a37c 336 /* If not the last one, add time of this one back to next */
grzemich 0:d7bd7384a37c 337 if (t->next != NULL) {
grzemich 0:d7bd7384a37c 338 t->next->time += t->time;
grzemich 0:d7bd7384a37c 339 }
grzemich 0:d7bd7384a37c 340 memp_free(MEMP_SYS_TIMEOUT, t);
grzemich 0:d7bd7384a37c 341 return;
grzemich 0:d7bd7384a37c 342 }
grzemich 0:d7bd7384a37c 343 }
grzemich 0:d7bd7384a37c 344 return;
grzemich 0:d7bd7384a37c 345 }
grzemich 0:d7bd7384a37c 346
grzemich 0:d7bd7384a37c 347 #if NO_SYS
grzemich 0:d7bd7384a37c 348
grzemich 0:d7bd7384a37c 349 /** Handle timeouts for NO_SYS==1 (i.e. without using
grzemich 0:d7bd7384a37c 350 * tcpip_thread/sys_timeouts_mbox_fetch(). Uses sys_now() to call timeout
grzemich 0:d7bd7384a37c 351 * handler functions when timeouts expire.
grzemich 0:d7bd7384a37c 352 *
grzemich 0:d7bd7384a37c 353 * Must be called periodically from your main loop.
grzemich 0:d7bd7384a37c 354 */
grzemich 0:d7bd7384a37c 355 void
grzemich 0:d7bd7384a37c 356 sys_check_timeouts(void)
grzemich 0:d7bd7384a37c 357 {
grzemich 0:d7bd7384a37c 358 struct sys_timeo *tmptimeout;
grzemich 0:d7bd7384a37c 359 u32_t diff;
grzemich 0:d7bd7384a37c 360 sys_timeout_handler handler;
grzemich 0:d7bd7384a37c 361 void *arg;
grzemich 0:d7bd7384a37c 362 int had_one;
grzemich 0:d7bd7384a37c 363 u32_t now;
grzemich 0:d7bd7384a37c 364
grzemich 0:d7bd7384a37c 365 now = sys_now();
grzemich 0:d7bd7384a37c 366 if (next_timeout) {
grzemich 0:d7bd7384a37c 367 /* this cares for wraparounds */
grzemich 0:d7bd7384a37c 368 diff = LWIP_U32_DIFF(now, timeouts_last_time);
grzemich 0:d7bd7384a37c 369 do
grzemich 0:d7bd7384a37c 370 {
grzemich 0:d7bd7384a37c 371 had_one = 0;
grzemich 0:d7bd7384a37c 372 tmptimeout = next_timeout;
grzemich 0:d7bd7384a37c 373 if (tmptimeout->time <= diff) {
grzemich 0:d7bd7384a37c 374 /* timeout has expired */
grzemich 0:d7bd7384a37c 375 had_one = 1;
grzemich 0:d7bd7384a37c 376 timeouts_last_time = now;
grzemich 0:d7bd7384a37c 377 diff -= tmptimeout->time;
grzemich 0:d7bd7384a37c 378 next_timeout = tmptimeout->next;
grzemich 0:d7bd7384a37c 379 handler = tmptimeout->h;
grzemich 0:d7bd7384a37c 380 arg = tmptimeout->arg;
grzemich 0:d7bd7384a37c 381 #if LWIP_DEBUG_TIMERNAMES
grzemich 0:d7bd7384a37c 382 if (handler != NULL) {
grzemich 0:d7bd7384a37c 383 LWIP_DEBUGF(TIMERS_DEBUG, ("sct calling h=%s arg=%p\n",
grzemich 0:d7bd7384a37c 384 tmptimeout->handler_name, arg));
grzemich 0:d7bd7384a37c 385 }
grzemich 0:d7bd7384a37c 386 #endif /* LWIP_DEBUG_TIMERNAMES */
grzemich 0:d7bd7384a37c 387 memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
grzemich 0:d7bd7384a37c 388 if (handler != NULL) {
grzemich 0:d7bd7384a37c 389 handler(arg);
grzemich 0:d7bd7384a37c 390 }
grzemich 0:d7bd7384a37c 391 }
grzemich 0:d7bd7384a37c 392 /* repeat until all expired timers have been called */
grzemich 0:d7bd7384a37c 393 }while(had_one);
grzemich 0:d7bd7384a37c 394 }
grzemich 0:d7bd7384a37c 395 }
grzemich 0:d7bd7384a37c 396
grzemich 0:d7bd7384a37c 397 /** Set back the timestamp of the last call to sys_check_timeouts()
grzemich 0:d7bd7384a37c 398 * This is necessary if sys_check_timeouts() hasn't been called for a long
grzemich 0:d7bd7384a37c 399 * time (e.g. while saving energy) to prevent all timer functions of that
grzemich 0:d7bd7384a37c 400 * period being called.
grzemich 0:d7bd7384a37c 401 */
grzemich 0:d7bd7384a37c 402 void
grzemich 0:d7bd7384a37c 403 sys_restart_timeouts(void)
grzemich 0:d7bd7384a37c 404 {
grzemich 0:d7bd7384a37c 405 timeouts_last_time = sys_now();
grzemich 0:d7bd7384a37c 406 }
grzemich 0:d7bd7384a37c 407
grzemich 0:d7bd7384a37c 408 #else /* NO_SYS */
grzemich 0:d7bd7384a37c 409
grzemich 0:d7bd7384a37c 410 /**
grzemich 0:d7bd7384a37c 411 * Wait (forever) for a message to arrive in an mbox.
grzemich 0:d7bd7384a37c 412 * While waiting, timeouts are processed.
grzemich 0:d7bd7384a37c 413 *
grzemich 0:d7bd7384a37c 414 * @param mbox the mbox to fetch the message from
grzemich 0:d7bd7384a37c 415 * @param msg the place to store the message
grzemich 0:d7bd7384a37c 416 */
grzemich 0:d7bd7384a37c 417 void
grzemich 0:d7bd7384a37c 418 sys_timeouts_mbox_fetch(sys_mbox_t *mbox, void **msg)
grzemich 0:d7bd7384a37c 419 {
grzemich 0:d7bd7384a37c 420 u32_t time_needed;
grzemich 0:d7bd7384a37c 421 struct sys_timeo *tmptimeout;
grzemich 0:d7bd7384a37c 422 sys_timeout_handler handler;
grzemich 0:d7bd7384a37c 423 void *arg;
grzemich 0:d7bd7384a37c 424
grzemich 0:d7bd7384a37c 425 again:
grzemich 0:d7bd7384a37c 426 if (!next_timeout) {
grzemich 0:d7bd7384a37c 427 time_needed = sys_arch_mbox_fetch(mbox, msg, 0);
grzemich 0:d7bd7384a37c 428 } else {
grzemich 0:d7bd7384a37c 429 if (next_timeout->time > 0) {
grzemich 0:d7bd7384a37c 430 time_needed = sys_arch_mbox_fetch(mbox, msg, next_timeout->time);
grzemich 0:d7bd7384a37c 431 } else {
grzemich 0:d7bd7384a37c 432 time_needed = SYS_ARCH_TIMEOUT;
grzemich 0:d7bd7384a37c 433 }
grzemich 0:d7bd7384a37c 434
grzemich 0:d7bd7384a37c 435 if (time_needed == SYS_ARCH_TIMEOUT) {
grzemich 0:d7bd7384a37c 436 /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message
grzemich 0:d7bd7384a37c 437 could be fetched. We should now call the timeout handler and
grzemich 0:d7bd7384a37c 438 deallocate the memory allocated for the timeout. */
grzemich 0:d7bd7384a37c 439 tmptimeout = next_timeout;
grzemich 0:d7bd7384a37c 440 next_timeout = tmptimeout->next;
grzemich 0:d7bd7384a37c 441 handler = tmptimeout->h;
grzemich 0:d7bd7384a37c 442 arg = tmptimeout->arg;
grzemich 0:d7bd7384a37c 443 #if LWIP_DEBUG_TIMERNAMES
grzemich 0:d7bd7384a37c 444 if (handler != NULL) {
grzemich 0:d7bd7384a37c 445 LWIP_DEBUGF(TIMERS_DEBUG, ("stmf calling h=%s arg=%p\n",
grzemich 0:d7bd7384a37c 446 tmptimeout->handler_name, arg));
grzemich 0:d7bd7384a37c 447 }
grzemich 0:d7bd7384a37c 448 #endif /* LWIP_DEBUG_TIMERNAMES */
grzemich 0:d7bd7384a37c 449 memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
grzemich 0:d7bd7384a37c 450 if (handler != NULL) {
grzemich 0:d7bd7384a37c 451 /* For LWIP_TCPIP_CORE_LOCKING, lock the core before calling the
grzemich 0:d7bd7384a37c 452 timeout handler function. */
grzemich 0:d7bd7384a37c 453 LOCK_TCPIP_CORE();
grzemich 0:d7bd7384a37c 454 handler(arg);
grzemich 0:d7bd7384a37c 455 UNLOCK_TCPIP_CORE();
grzemich 0:d7bd7384a37c 456 }
grzemich 0:d7bd7384a37c 457 LWIP_TCPIP_THREAD_ALIVE();
grzemich 0:d7bd7384a37c 458
grzemich 0:d7bd7384a37c 459 /* We try again to fetch a message from the mbox. */
grzemich 0:d7bd7384a37c 460 goto again;
grzemich 0:d7bd7384a37c 461 } else {
grzemich 0:d7bd7384a37c 462 /* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout
grzemich 0:d7bd7384a37c 463 occured. The time variable is set to the number of
grzemich 0:d7bd7384a37c 464 milliseconds we waited for the message. */
grzemich 0:d7bd7384a37c 465 if (time_needed < next_timeout->time) {
grzemich 0:d7bd7384a37c 466 next_timeout->time -= time_needed;
grzemich 0:d7bd7384a37c 467 } else {
grzemich 0:d7bd7384a37c 468 next_timeout->time = 0;
grzemich 0:d7bd7384a37c 469 }
grzemich 0:d7bd7384a37c 470 }
grzemich 0:d7bd7384a37c 471 }
grzemich 0:d7bd7384a37c 472 }
grzemich 0:d7bd7384a37c 473
grzemich 0:d7bd7384a37c 474 #endif /* NO_SYS */
grzemich 0:d7bd7384a37c 475
grzemich 0:d7bd7384a37c 476 #else /* LWIP_TIMERS */
grzemich 0:d7bd7384a37c 477 /* Satisfy the TCP code which calls this function */
grzemich 0:d7bd7384a37c 478 void
grzemich 0:d7bd7384a37c 479 tcp_timer_needed(void)
grzemich 0:d7bd7384a37c 480 {
grzemich 0:d7bd7384a37c 481 }
grzemich 0:d7bd7384a37c 482 #endif /* LWIP_TIMERS */