Pascal Nysten / lwip

Adapted to Lora Semtech + Nucleo

Dependencies:   DebugLib

Dependents:   LoRaWAN-lmic-app LoRaWAN-lmic-app LoRaWAN-test-10secs LoRaPersonalizedDeviceForEverynet ... more

Fork of lwip_ppp_ethernet by Donatien Garnier

src/core/timers.c@3:a9e6ba815945, 2015-11-20 (annotated)

Committer:
pnysten
Date:
Fri Nov 20 12:30:58 2015 +0000
Revision:
3:a9e6ba815945
Parent:
0:8e01dca41002 
Adapted to Nucleo, LoRa Semtech

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:8e01dca41002 1 /**
donatien 0:8e01dca41002 2 * @file
donatien 0:8e01dca41002 3 * Stack-internal timers implementation.
donatien 0:8e01dca41002 4 * This file includes timer callbacks for stack-internal timers as well as
donatien 0:8e01dca41002 5 * functions to set up or stop timers and check for expired timers.
donatien 0:8e01dca41002 6 *
donatien 0:8e01dca41002 7 */
donatien 0:8e01dca41002 8
donatien 0:8e01dca41002 9 /*
donatien 0:8e01dca41002 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
donatien 0:8e01dca41002 11 * All rights reserved.
donatien 0:8e01dca41002 12 *
donatien 0:8e01dca41002 13 * Redistribution and use in source and binary forms, with or without modification,
donatien 0:8e01dca41002 14 * are permitted provided that the following conditions are met:
donatien 0:8e01dca41002 15 *
donatien 0:8e01dca41002 16 * 1. Redistributions of source code must retain the above copyright notice,
donatien 0:8e01dca41002 17 * this list of conditions and the following disclaimer.
donatien 0:8e01dca41002 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
donatien 0:8e01dca41002 19 * this list of conditions and the following disclaimer in the documentation
donatien 0:8e01dca41002 20 * and/or other materials provided with the distribution.
donatien 0:8e01dca41002 21 * 3. The name of the author may not be used to endorse or promote products
donatien 0:8e01dca41002 22 * derived from this software without specific prior written permission.
donatien 0:8e01dca41002 23 *
donatien 0:8e01dca41002 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
donatien 0:8e01dca41002 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
donatien 0:8e01dca41002 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
donatien 0:8e01dca41002 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
donatien 0:8e01dca41002 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
donatien 0:8e01dca41002 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
donatien 0:8e01dca41002 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
donatien 0:8e01dca41002 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
donatien 0:8e01dca41002 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
donatien 0:8e01dca41002 33 * OF SUCH DAMAGE.
donatien 0:8e01dca41002 34 *
donatien 0:8e01dca41002 35 * This file is part of the lwIP TCP/IP stack.
donatien 0:8e01dca41002 36 *
donatien 0:8e01dca41002 37 * Author: Adam Dunkels <adam@sics.se>
donatien 0:8e01dca41002 38 * Simon Goldschmidt
donatien 0:8e01dca41002 39 *
donatien 0:8e01dca41002 40 */
donatien 0:8e01dca41002 41
donatien 0:8e01dca41002 42 #include "lwip/opt.h"
donatien 0:8e01dca41002 43
donatien 0:8e01dca41002 44 #include "lwip/timers.h"
donatien 0:8e01dca41002 45 #include "lwip/tcp_impl.h"
donatien 0:8e01dca41002 46
donatien 0:8e01dca41002 47 #if LWIP_TIMERS
donatien 0:8e01dca41002 48
donatien 0:8e01dca41002 49 #include "lwip/def.h"
donatien 0:8e01dca41002 50 #include "lwip/memp.h"
donatien 0:8e01dca41002 51 #include "lwip/tcpip.h"
donatien 0:8e01dca41002 52
donatien 0:8e01dca41002 53 #include "lwip/ip_frag.h"
donatien 0:8e01dca41002 54 #include "netif/etharp.h"
donatien 0:8e01dca41002 55 #include "lwip/dhcp.h"
donatien 0:8e01dca41002 56 #include "lwip/autoip.h"
donatien 0:8e01dca41002 57 #include "lwip/igmp.h"
donatien 0:8e01dca41002 58 #include "lwip/dns.h"
donatien 0:8e01dca41002 59
donatien 0:8e01dca41002 60
donatien 0:8e01dca41002 61 /** The one and only timeout list */
donatien 0:8e01dca41002 62 static struct sys_timeo *next_timeout;
donatien 0:8e01dca41002 63 #if NO_SYS
donatien 0:8e01dca41002 64 static u32_t timeouts_last_time;
donatien 0:8e01dca41002 65 #endif /* NO_SYS */
donatien 0:8e01dca41002 66
donatien 0:8e01dca41002 67 #if LWIP_TCP
donatien 0:8e01dca41002 68 /** global variable that shows if the tcp timer is currently scheduled or not */
donatien 0:8e01dca41002 69 static int tcpip_tcp_timer_active;
donatien 0:8e01dca41002 70
donatien 0:8e01dca41002 71 /**
donatien 0:8e01dca41002 72 * Timer callback function that calls tcp_tmr() and reschedules itself.
donatien 0:8e01dca41002 73 *
donatien 0:8e01dca41002 74 * @param arg unused argument
donatien 0:8e01dca41002 75 */
donatien 0:8e01dca41002 76 static void
donatien 0:8e01dca41002 77 tcpip_tcp_timer(void *arg)
donatien 0:8e01dca41002 78 {
donatien 0:8e01dca41002 79 LWIP_UNUSED_ARG(arg);
donatien 0:8e01dca41002 80
donatien 0:8e01dca41002 81 /* call TCP timer handler */
donatien 0:8e01dca41002 82 tcp_tmr();
donatien 0:8e01dca41002 83 /* timer still needed? */
donatien 0:8e01dca41002 84 if (tcp_active_pcbs || tcp_tw_pcbs) {
donatien 0:8e01dca41002 85 /* restart timer */
donatien 0:8e01dca41002 86 sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
donatien 0:8e01dca41002 87 } else {
donatien 0:8e01dca41002 88 /* disable timer */
donatien 0:8e01dca41002 89 tcpip_tcp_timer_active = 0;
donatien 0:8e01dca41002 90 }
donatien 0:8e01dca41002 91 }
donatien 0:8e01dca41002 92
donatien 0:8e01dca41002 93 /**
donatien 0:8e01dca41002 94 * Called from TCP_REG when registering a new PCB:
donatien 0:8e01dca41002 95 * the reason is to have the TCP timer only running when
donatien 0:8e01dca41002 96 * there are active (or time-wait) PCBs.
donatien 0:8e01dca41002 97 */
donatien 0:8e01dca41002 98 void
donatien 0:8e01dca41002 99 tcp_timer_needed(void)
donatien 0:8e01dca41002 100 {
donatien 0:8e01dca41002 101 /* timer is off but needed again? */
donatien 0:8e01dca41002 102 if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) {
donatien 0:8e01dca41002 103 /* enable and start timer */
donatien 0:8e01dca41002 104 tcpip_tcp_timer_active = 1;
donatien 0:8e01dca41002 105 sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
donatien 0:8e01dca41002 106 }
donatien 0:8e01dca41002 107 }
donatien 0:8e01dca41002 108 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 109
donatien 0:8e01dca41002 110 #if IP_REASSEMBLY
donatien 0:8e01dca41002 111 /**
donatien 0:8e01dca41002 112 * Timer callback function that calls ip_reass_tmr() and reschedules itself.
donatien 0:8e01dca41002 113 *
donatien 0:8e01dca41002 114 * @param arg unused argument
donatien 0:8e01dca41002 115 */
donatien 0:8e01dca41002 116 static void
donatien 0:8e01dca41002 117 ip_reass_timer(void *arg)
donatien 0:8e01dca41002 118 {
donatien 0:8e01dca41002 119 LWIP_UNUSED_ARG(arg);
donatien 0:8e01dca41002 120 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: ip_reass_tmr()\n"));
donatien 0:8e01dca41002 121 ip_reass_tmr();
donatien 0:8e01dca41002 122 sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
donatien 0:8e01dca41002 123 }
donatien 0:8e01dca41002 124 #endif /* IP_REASSEMBLY */
donatien 0:8e01dca41002 125
donatien 0:8e01dca41002 126 #if LWIP_ARP
donatien 0:8e01dca41002 127 /**
donatien 0:8e01dca41002 128 * Timer callback function that calls etharp_tmr() and reschedules itself.
donatien 0:8e01dca41002 129 *
donatien 0:8e01dca41002 130 * @param arg unused argument
donatien 0:8e01dca41002 131 */
donatien 0:8e01dca41002 132 static void
donatien 0:8e01dca41002 133 arp_timer(void *arg)
donatien 0:8e01dca41002 134 {
donatien 0:8e01dca41002 135 LWIP_UNUSED_ARG(arg);
donatien 0:8e01dca41002 136 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: etharp_tmr()\n"));
donatien 0:8e01dca41002 137 etharp_tmr();
donatien 0:8e01dca41002 138 sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
donatien 0:8e01dca41002 139 }
donatien 0:8e01dca41002 140 #endif /* LWIP_ARP */
donatien 0:8e01dca41002 141
donatien 0:8e01dca41002 142 #if LWIP_DHCP
donatien 0:8e01dca41002 143 /**
donatien 0:8e01dca41002 144 * Timer callback function that calls dhcp_coarse_tmr() and reschedules itself.
donatien 0:8e01dca41002 145 *
donatien 0:8e01dca41002 146 * @param arg unused argument
donatien 0:8e01dca41002 147 */
donatien 0:8e01dca41002 148 static void
donatien 0:8e01dca41002 149 dhcp_timer_coarse(void *arg)
donatien 0:8e01dca41002 150 {
donatien 0:8e01dca41002 151 LWIP_UNUSED_ARG(arg);
donatien 0:8e01dca41002 152 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dhcp_coarse_tmr()\n"));
donatien 0:8e01dca41002 153 dhcp_coarse_tmr();
donatien 0:8e01dca41002 154 sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
donatien 0:8e01dca41002 155 }
donatien 0:8e01dca41002 156
donatien 0:8e01dca41002 157 /**
donatien 0:8e01dca41002 158 * Timer callback function that calls dhcp_fine_tmr() and reschedules itself.
donatien 0:8e01dca41002 159 *
donatien 0:8e01dca41002 160 * @param arg unused argument
donatien 0:8e01dca41002 161 */
donatien 0:8e01dca41002 162 static void
donatien 0:8e01dca41002 163 dhcp_timer_fine(void *arg)
donatien 0:8e01dca41002 164 {
donatien 0:8e01dca41002 165 LWIP_UNUSED_ARG(arg);
donatien 0:8e01dca41002 166 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dhcp_fine_tmr()\n"));
donatien 0:8e01dca41002 167 dhcp_fine_tmr();
donatien 0:8e01dca41002 168 sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
donatien 0:8e01dca41002 169 }
donatien 0:8e01dca41002 170 #endif /* LWIP_DHCP */
donatien 0:8e01dca41002 171
donatien 0:8e01dca41002 172 #if LWIP_AUTOIP
donatien 0:8e01dca41002 173 /**
donatien 0:8e01dca41002 174 * Timer callback function that calls autoip_tmr() and reschedules itself.
donatien 0:8e01dca41002 175 *
donatien 0:8e01dca41002 176 * @param arg unused argument
donatien 0:8e01dca41002 177 */
donatien 0:8e01dca41002 178 static void
donatien 0:8e01dca41002 179 autoip_timer(void *arg)
donatien 0:8e01dca41002 180 {
donatien 0:8e01dca41002 181 LWIP_UNUSED_ARG(arg);
donatien 0:8e01dca41002 182 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: autoip_tmr()\n"));
donatien 0:8e01dca41002 183 autoip_tmr();
donatien 0:8e01dca41002 184 sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL);
donatien 0:8e01dca41002 185 }
donatien 0:8e01dca41002 186 #endif /* LWIP_AUTOIP */
donatien 0:8e01dca41002 187
donatien 0:8e01dca41002 188 #if LWIP_IGMP
donatien 0:8e01dca41002 189 /**
donatien 0:8e01dca41002 190 * Timer callback function that calls igmp_tmr() and reschedules itself.
donatien 0:8e01dca41002 191 *
donatien 0:8e01dca41002 192 * @param arg unused argument
donatien 0:8e01dca41002 193 */
donatien 0:8e01dca41002 194 static void
donatien 0:8e01dca41002 195 igmp_timer(void *arg)
donatien 0:8e01dca41002 196 {
donatien 0:8e01dca41002 197 LWIP_UNUSED_ARG(arg);
donatien 0:8e01dca41002 198 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: igmp_tmr()\n"));
donatien 0:8e01dca41002 199 igmp_tmr();
donatien 0:8e01dca41002 200 sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
donatien 0:8e01dca41002 201 }
donatien 0:8e01dca41002 202 #endif /* LWIP_IGMP */
donatien 0:8e01dca41002 203
donatien 0:8e01dca41002 204 #if LWIP_DNS
donatien 0:8e01dca41002 205 /**
donatien 0:8e01dca41002 206 * Timer callback function that calls dns_tmr() and reschedules itself.
donatien 0:8e01dca41002 207 *
donatien 0:8e01dca41002 208 * @param arg unused argument
donatien 0:8e01dca41002 209 */
donatien 0:8e01dca41002 210 static void
donatien 0:8e01dca41002 211 dns_timer(void *arg)
donatien 0:8e01dca41002 212 {
donatien 0:8e01dca41002 213 LWIP_UNUSED_ARG(arg);
donatien 0:8e01dca41002 214 LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dns_tmr()\n"));
donatien 0:8e01dca41002 215 dns_tmr();
donatien 0:8e01dca41002 216 sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL);
donatien 0:8e01dca41002 217 }
donatien 0:8e01dca41002 218 #endif /* LWIP_DNS */
donatien 0:8e01dca41002 219
donatien 0:8e01dca41002 220 /** Initialize this module */
donatien 0:8e01dca41002 221 void sys_timeouts_init(void)
donatien 0:8e01dca41002 222 {
donatien 0:8e01dca41002 223 #if IP_REASSEMBLY
donatien 0:8e01dca41002 224 sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
donatien 0:8e01dca41002 225 #endif /* IP_REASSEMBLY */
donatien 0:8e01dca41002 226 #if LWIP_ARP
donatien 0:8e01dca41002 227 sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
donatien 0:8e01dca41002 228 #endif /* LWIP_ARP */
donatien 0:8e01dca41002 229 #if LWIP_DHCP
donatien 0:8e01dca41002 230 sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
donatien 0:8e01dca41002 231 sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
donatien 0:8e01dca41002 232 #endif /* LWIP_DHCP */
donatien 0:8e01dca41002 233 #if LWIP_AUTOIP
donatien 0:8e01dca41002 234 sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL);
donatien 0:8e01dca41002 235 #endif /* LWIP_AUTOIP */
donatien 0:8e01dca41002 236 #if LWIP_IGMP
donatien 0:8e01dca41002 237 sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
donatien 0:8e01dca41002 238 #endif /* LWIP_IGMP */
donatien 0:8e01dca41002 239 #if LWIP_DNS
donatien 0:8e01dca41002 240 sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL);
donatien 0:8e01dca41002 241 #endif /* LWIP_DNS */
donatien 0:8e01dca41002 242
donatien 0:8e01dca41002 243 #if NO_SYS
donatien 0:8e01dca41002 244 /* Initialise timestamp for sys_check_timeouts */
donatien 0:8e01dca41002 245 timeouts_last_time = sys_now();
donatien 0:8e01dca41002 246 #endif
donatien 0:8e01dca41002 247 }
donatien 0:8e01dca41002 248
donatien 0:8e01dca41002 249 /**
donatien 0:8e01dca41002 250 * Create a one-shot timer (aka timeout). Timeouts are processed in the
donatien 0:8e01dca41002 251 * following cases:
donatien 0:8e01dca41002 252 * - while waiting for a message using sys_timeouts_mbox_fetch()
donatien 0:8e01dca41002 253 * - by calling sys_check_timeouts() (NO_SYS==1 only)
donatien 0:8e01dca41002 254 *
donatien 0:8e01dca41002 255 * @param msecs time in milliseconds after that the timer should expire
donatien 0:8e01dca41002 256 * @param handler callback function to call when msecs have elapsed
donatien 0:8e01dca41002 257 * @param arg argument to pass to the callback function
donatien 0:8e01dca41002 258 */
donatien 0:8e01dca41002 259 #if LWIP_DEBUG_TIMERNAMES
donatien 0:8e01dca41002 260 void
donatien 0:8e01dca41002 261 sys_timeout_debug(u32_t msecs, sys_timeout_handler handler, void *arg, const char* handler_name)
donatien 0:8e01dca41002 262 #else /* LWIP_DEBUG_TIMERNAMES */
donatien 0:8e01dca41002 263 void
donatien 0:8e01dca41002 264 sys_timeout(u32_t msecs, sys_timeout_handler handler, void *arg)
donatien 0:8e01dca41002 265 #endif /* LWIP_DEBUG_TIMERNAMES */
donatien 0:8e01dca41002 266 {
donatien 0:8e01dca41002 267 struct sys_timeo *timeout, *t;
donatien 0:8e01dca41002 268
donatien 0:8e01dca41002 269 timeout = (struct sys_timeo *)memp_malloc(MEMP_SYS_TIMEOUT);
donatien 0:8e01dca41002 270 if (timeout == NULL) {
donatien 0:8e01dca41002 271 LWIP_ASSERT("sys_timeout: timeout != NULL, pool MEMP_SYS_TIMEOUT is empty", timeout != NULL);
donatien 0:8e01dca41002 272 return;
donatien 0:8e01dca41002 273 }
donatien 0:8e01dca41002 274 timeout->next = NULL;
donatien 0:8e01dca41002 275 timeout->h = handler;
donatien 0:8e01dca41002 276 timeout->arg = arg;
donatien 0:8e01dca41002 277 timeout->time = msecs;
donatien 0:8e01dca41002 278 #if LWIP_DEBUG_TIMERNAMES
donatien 0:8e01dca41002 279 timeout->handler_name = handler_name;
donatien 0:8e01dca41002 280 LWIP_DEBUGF(TIMERS_DEBUG, ("sys_timeout: %p msecs=%"U32_F" handler=%s arg=%p\n",
donatien 0:8e01dca41002 281 (void *)timeout, msecs, handler_name, (void *)arg));
donatien 0:8e01dca41002 282 #endif /* LWIP_DEBUG_TIMERNAMES */
donatien 0:8e01dca41002 283
donatien 0:8e01dca41002 284 if (next_timeout == NULL) {
donatien 0:8e01dca41002 285 next_timeout = timeout;
donatien 0:8e01dca41002 286 return;
donatien 0:8e01dca41002 287 }
donatien 0:8e01dca41002 288
donatien 0:8e01dca41002 289 if (next_timeout->time > msecs) {
donatien 0:8e01dca41002 290 next_timeout->time -= msecs;
donatien 0:8e01dca41002 291 timeout->next = next_timeout;
donatien 0:8e01dca41002 292 next_timeout = timeout;
donatien 0:8e01dca41002 293 } else {
donatien 0:8e01dca41002 294 for(t = next_timeout; t != NULL; t = t->next) {
donatien 0:8e01dca41002 295 timeout->time -= t->time;
donatien 0:8e01dca41002 296 if (t->next == NULL || t->next->time > timeout->time) {
donatien 0:8e01dca41002 297 if (t->next != NULL) {
donatien 0:8e01dca41002 298 t->next->time -= timeout->time;
donatien 0:8e01dca41002 299 }
donatien 0:8e01dca41002 300 timeout->next = t->next;
donatien 0:8e01dca41002 301 t->next = timeout;
donatien 0:8e01dca41002 302 break;
donatien 0:8e01dca41002 303 }
donatien 0:8e01dca41002 304 }
donatien 0:8e01dca41002 305 }
donatien 0:8e01dca41002 306 }
donatien 0:8e01dca41002 307
donatien 0:8e01dca41002 308 /**
donatien 0:8e01dca41002 309 * Go through timeout list (for this task only) and remove the first matching
donatien 0:8e01dca41002 310 * entry, even though the timeout has not triggered yet.
donatien 0:8e01dca41002 311 *
donatien 0:8e01dca41002 312 * @note This function only works as expected if there is only one timeout
donatien 0:8e01dca41002 313 * calling 'handler' in the list of timeouts.
donatien 0:8e01dca41002 314 *
donatien 0:8e01dca41002 315 * @param handler callback function that would be called by the timeout
donatien 0:8e01dca41002 316 * @param arg callback argument that would be passed to handler
donatien 0:8e01dca41002 317 */
donatien 0:8e01dca41002 318 void
donatien 0:8e01dca41002 319 sys_untimeout(sys_timeout_handler handler, void *arg)
donatien 0:8e01dca41002 320 {
donatien 0:8e01dca41002 321 struct sys_timeo *prev_t, *t;
donatien 0:8e01dca41002 322
donatien 0:8e01dca41002 323 if (next_timeout == NULL) {
donatien 0:8e01dca41002 324 return;
donatien 0:8e01dca41002 325 }
donatien 0:8e01dca41002 326
donatien 0:8e01dca41002 327 for (t = next_timeout, prev_t = NULL; t != NULL; prev_t = t, t = t->next) {
donatien 0:8e01dca41002 328 if ((t->h == handler) && (t->arg == arg)) {
donatien 0:8e01dca41002 329 /* We have a match */
donatien 0:8e01dca41002 330 /* Unlink from previous in list */
donatien 0:8e01dca41002 331 if (prev_t == NULL) {
donatien 0:8e01dca41002 332 next_timeout = t->next;
donatien 0:8e01dca41002 333 } else {
donatien 0:8e01dca41002 334 prev_t->next = t->next;
donatien 0:8e01dca41002 335 }
donatien 0:8e01dca41002 336 /* If not the last one, add time of this one back to next */
donatien 0:8e01dca41002 337 if (t->next != NULL) {
donatien 0:8e01dca41002 338 t->next->time += t->time;
donatien 0:8e01dca41002 339 }
donatien 0:8e01dca41002 340 memp_free(MEMP_SYS_TIMEOUT, t);
donatien 0:8e01dca41002 341 return;
donatien 0:8e01dca41002 342 }
donatien 0:8e01dca41002 343 }
donatien 0:8e01dca41002 344 return;
donatien 0:8e01dca41002 345 }
donatien 0:8e01dca41002 346
donatien 0:8e01dca41002 347 #if NO_SYS
donatien 0:8e01dca41002 348
donatien 0:8e01dca41002 349 /** Handle timeouts for NO_SYS==1 (i.e. without using
donatien 0:8e01dca41002 350 * tcpip_thread/sys_timeouts_mbox_fetch(). Uses sys_now() to call timeout
donatien 0:8e01dca41002 351 * handler functions when timeouts expire.
donatien 0:8e01dca41002 352 *
donatien 0:8e01dca41002 353 * Must be called periodically from your main loop.
donatien 0:8e01dca41002 354 */
donatien 0:8e01dca41002 355 void
donatien 0:8e01dca41002 356 sys_check_timeouts(void)
donatien 0:8e01dca41002 357 {
donatien 0:8e01dca41002 358 struct sys_timeo *tmptimeout;
donatien 0:8e01dca41002 359 u32_t diff;
donatien 0:8e01dca41002 360 sys_timeout_handler handler;
donatien 0:8e01dca41002 361 void *arg;
donatien 0:8e01dca41002 362 int had_one;
donatien 0:8e01dca41002 363 u32_t now;
donatien 0:8e01dca41002 364
donatien 0:8e01dca41002 365 now = sys_now();
donatien 0:8e01dca41002 366 if (next_timeout) {
donatien 0:8e01dca41002 367 /* this cares for wraparounds */
donatien 0:8e01dca41002 368 diff = LWIP_U32_DIFF(now, timeouts_last_time);
donatien 0:8e01dca41002 369 do
donatien 0:8e01dca41002 370 {
donatien 0:8e01dca41002 371 had_one = 0;
donatien 0:8e01dca41002 372 tmptimeout = next_timeout;
donatien 0:8e01dca41002 373 if (tmptimeout->time <= diff) {
donatien 0:8e01dca41002 374 /* timeout has expired */
donatien 0:8e01dca41002 375 had_one = 1;
donatien 0:8e01dca41002 376 timeouts_last_time = now;
donatien 0:8e01dca41002 377 diff -= tmptimeout->time;
donatien 0:8e01dca41002 378 next_timeout = tmptimeout->next;
donatien 0:8e01dca41002 379 handler = tmptimeout->h;
donatien 0:8e01dca41002 380 arg = tmptimeout->arg;
donatien 0:8e01dca41002 381 #if LWIP_DEBUG_TIMERNAMES
donatien 0:8e01dca41002 382 if (handler != NULL) {
donatien 0:8e01dca41002 383 LWIP_DEBUGF(TIMERS_DEBUG, ("sct calling h=%s arg=%p\n",
donatien 0:8e01dca41002 384 tmptimeout->handler_name, arg));
donatien 0:8e01dca41002 385 }
donatien 0:8e01dca41002 386 #endif /* LWIP_DEBUG_TIMERNAMES */
donatien 0:8e01dca41002 387 memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
donatien 0:8e01dca41002 388 if (handler != NULL) {
donatien 0:8e01dca41002 389 handler(arg);
donatien 0:8e01dca41002 390 }
donatien 0:8e01dca41002 391 }
donatien 0:8e01dca41002 392 /* repeat until all expired timers have been called */
donatien 0:8e01dca41002 393 }while(had_one);
donatien 0:8e01dca41002 394 }
donatien 0:8e01dca41002 395 }
donatien 0:8e01dca41002 396
donatien 0:8e01dca41002 397 /** Set back the timestamp of the last call to sys_check_timeouts()
donatien 0:8e01dca41002 398 * This is necessary if sys_check_timeouts() hasn't been called for a long
donatien 0:8e01dca41002 399 * time (e.g. while saving energy) to prevent all timer functions of that
donatien 0:8e01dca41002 400 * period being called.
donatien 0:8e01dca41002 401 */
donatien 0:8e01dca41002 402 void
donatien 0:8e01dca41002 403 sys_restart_timeouts(void)
donatien 0:8e01dca41002 404 {
donatien 0:8e01dca41002 405 timeouts_last_time = sys_now();
donatien 0:8e01dca41002 406 }
donatien 0:8e01dca41002 407
donatien 0:8e01dca41002 408 #else /* NO_SYS */
donatien 0:8e01dca41002 409
donatien 0:8e01dca41002 410 /**
donatien 0:8e01dca41002 411 * Wait (forever) for a message to arrive in an mbox.
donatien 0:8e01dca41002 412 * While waiting, timeouts are processed.
donatien 0:8e01dca41002 413 *
donatien 0:8e01dca41002 414 * @param mbox the mbox to fetch the message from
donatien 0:8e01dca41002 415 * @param msg the place to store the message
donatien 0:8e01dca41002 416 */
donatien 0:8e01dca41002 417 void
donatien 0:8e01dca41002 418 sys_timeouts_mbox_fetch(sys_mbox_t *mbox, void **msg)
donatien 0:8e01dca41002 419 {
donatien 0:8e01dca41002 420 u32_t time_needed;
donatien 0:8e01dca41002 421 struct sys_timeo *tmptimeout;
donatien 0:8e01dca41002 422 sys_timeout_handler handler;
donatien 0:8e01dca41002 423 void *arg;
donatien 0:8e01dca41002 424
donatien 0:8e01dca41002 425 again:
donatien 0:8e01dca41002 426 if (!next_timeout) {
donatien 0:8e01dca41002 427 time_needed = sys_arch_mbox_fetch(mbox, msg, 0);
donatien 0:8e01dca41002 428 } else {
donatien 0:8e01dca41002 429 if (next_timeout->time > 0) {
donatien 0:8e01dca41002 430 time_needed = sys_arch_mbox_fetch(mbox, msg, next_timeout->time);
donatien 0:8e01dca41002 431 } else {
donatien 0:8e01dca41002 432 time_needed = SYS_ARCH_TIMEOUT;
donatien 0:8e01dca41002 433 }
donatien 0:8e01dca41002 434
donatien 0:8e01dca41002 435 if (time_needed == SYS_ARCH_TIMEOUT) {
donatien 0:8e01dca41002 436 /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message
donatien 0:8e01dca41002 437 could be fetched. We should now call the timeout handler and
donatien 0:8e01dca41002 438 deallocate the memory allocated for the timeout. */
donatien 0:8e01dca41002 439 tmptimeout = next_timeout;
donatien 0:8e01dca41002 440 next_timeout = tmptimeout->next;
donatien 0:8e01dca41002 441 handler = tmptimeout->h;
donatien 0:8e01dca41002 442 arg = tmptimeout->arg;
donatien 0:8e01dca41002 443 #if LWIP_DEBUG_TIMERNAMES
donatien 0:8e01dca41002 444 if (handler != NULL) {
donatien 0:8e01dca41002 445 LWIP_DEBUGF(TIMERS_DEBUG, ("stmf calling h=%s arg=%p\n",
donatien 0:8e01dca41002 446 tmptimeout->handler_name, arg));
donatien 0:8e01dca41002 447 }
donatien 0:8e01dca41002 448 #endif /* LWIP_DEBUG_TIMERNAMES */
donatien 0:8e01dca41002 449 memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
donatien 0:8e01dca41002 450 if (handler != NULL) {
donatien 0:8e01dca41002 451 /* For LWIP_TCPIP_CORE_LOCKING, lock the core before calling the
donatien 0:8e01dca41002 452 timeout handler function. */
donatien 0:8e01dca41002 453 LOCK_TCPIP_CORE();
donatien 0:8e01dca41002 454 handler(arg);
donatien 0:8e01dca41002 455 UNLOCK_TCPIP_CORE();
donatien 0:8e01dca41002 456 }
donatien 0:8e01dca41002 457 LWIP_TCPIP_THREAD_ALIVE();
donatien 0:8e01dca41002 458
donatien 0:8e01dca41002 459 /* We try again to fetch a message from the mbox. */
donatien 0:8e01dca41002 460 goto again;
donatien 0:8e01dca41002 461 } else {
donatien 0:8e01dca41002 462 /* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout
donatien 0:8e01dca41002 463 occured. The time variable is set to the number of
donatien 0:8e01dca41002 464 milliseconds we waited for the message. */
donatien 0:8e01dca41002 465 if (time_needed < next_timeout->time) {
donatien 0:8e01dca41002 466 next_timeout->time -= time_needed;
donatien 0:8e01dca41002 467 } else {
donatien 0:8e01dca41002 468 next_timeout->time = 0;
donatien 0:8e01dca41002 469 }
donatien 0:8e01dca41002 470 }
donatien 0:8e01dca41002 471 }
donatien 0:8e01dca41002 472 }
donatien 0:8e01dca41002 473
donatien 0:8e01dca41002 474 #endif /* NO_SYS */
donatien 0:8e01dca41002 475
donatien 0:8e01dca41002 476 #else /* LWIP_TIMERS */
donatien 0:8e01dca41002 477 /* Satisfy the TCP code which calls this function */
donatien 0:8e01dca41002 478 void
donatien 0:8e01dca41002 479 tcp_timer_needed(void)
donatien 0:8e01dca41002 480 {
donatien 0:8e01dca41002 481 }
donatien 0:8e01dca41002 482 #endif /* LWIP_TIMERS */