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lwip/core/timers.c@7:4e2468d7d5cb, 2010-12-15 (annotated)
- Committer:
- segundo
- Date:
- Wed Dec 15 18:01:30 2010 +0000
- Revision:
- 7:4e2468d7d5cb
- Parent:
- 3:5a6792c147c0
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| segundo | 0:ac1725ba162c | 1 | /** |
| segundo | 0:ac1725ba162c | 2 | * @file |
| segundo | 0:ac1725ba162c | 3 | * Stack-internal timers implementation. |
| segundo | 0:ac1725ba162c | 4 | * This file includes timer callbacks for stack-internal timers as well as |
| segundo | 0:ac1725ba162c | 5 | * functions to set up or stop timers and check for expired timers. |
| segundo | 0:ac1725ba162c | 6 | * |
| segundo | 0:ac1725ba162c | 7 | */ |
| segundo | 0:ac1725ba162c | 8 | |
| segundo | 0:ac1725ba162c | 9 | /* |
| segundo | 0:ac1725ba162c | 10 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| segundo | 0:ac1725ba162c | 11 | * All rights reserved. |
| segundo | 0:ac1725ba162c | 12 | * |
| segundo | 0:ac1725ba162c | 13 | * Redistribution and use in source and binary forms, with or without modification, |
| segundo | 0:ac1725ba162c | 14 | * are permitted provided that the following conditions are met: |
| segundo | 0:ac1725ba162c | 15 | * |
| segundo | 0:ac1725ba162c | 16 | * 1. Redistributions of source code must retain the above copyright notice, |
| segundo | 0:ac1725ba162c | 17 | * this list of conditions and the following disclaimer. |
| segundo | 0:ac1725ba162c | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| segundo | 0:ac1725ba162c | 19 | * this list of conditions and the following disclaimer in the documentation |
| segundo | 0:ac1725ba162c | 20 | * and/or other materials provided with the distribution. |
| segundo | 0:ac1725ba162c | 21 | * 3. The name of the author may not be used to endorse or promote products |
| segundo | 0:ac1725ba162c | 22 | * derived from this software without specific prior written permission. |
| segundo | 0:ac1725ba162c | 23 | * |
| segundo | 0:ac1725ba162c | 24 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| segundo | 0:ac1725ba162c | 25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| segundo | 0:ac1725ba162c | 26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| segundo | 0:ac1725ba162c | 27 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| segundo | 0:ac1725ba162c | 28 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| segundo | 0:ac1725ba162c | 29 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| segundo | 0:ac1725ba162c | 30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| segundo | 0:ac1725ba162c | 31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| segundo | 0:ac1725ba162c | 32 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| segundo | 0:ac1725ba162c | 33 | * OF SUCH DAMAGE. |
| segundo | 0:ac1725ba162c | 34 | * |
| segundo | 0:ac1725ba162c | 35 | * This file is part of the lwIP TCP/IP stack. |
| segundo | 0:ac1725ba162c | 36 | * |
| segundo | 0:ac1725ba162c | 37 | * Author: Adam Dunkels <adam@sics.se> |
| segundo | 0:ac1725ba162c | 38 | * Simon Goldschmidt |
| segundo | 0:ac1725ba162c | 39 | * |
| segundo | 0:ac1725ba162c | 40 | */ |
| segundo | 0:ac1725ba162c | 41 | |
| segundo | 0:ac1725ba162c | 42 | #include "lwip/opt.h" |
| segundo | 0:ac1725ba162c | 43 | |
| segundo | 0:ac1725ba162c | 44 | #include "lwip/timers.h" |
| segundo | 0:ac1725ba162c | 45 | |
| segundo | 0:ac1725ba162c | 46 | #if LWIP_TIMERS |
| segundo | 0:ac1725ba162c | 47 | |
| segundo | 0:ac1725ba162c | 48 | #include "lwip/def.h" |
| segundo | 0:ac1725ba162c | 49 | #include "lwip/memp.h" |
| segundo | 0:ac1725ba162c | 50 | #include "lwip/tcpip.h" |
| segundo | 0:ac1725ba162c | 51 | |
| segundo | 0:ac1725ba162c | 52 | #include "lwip/tcp_impl.h" |
| segundo | 0:ac1725ba162c | 53 | #include "lwip/ip_frag.h" |
| segundo | 0:ac1725ba162c | 54 | #include "netif/etharp.h" |
| segundo | 0:ac1725ba162c | 55 | #include "lwip/dhcp.h" |
| segundo | 0:ac1725ba162c | 56 | #include "lwip/autoip.h" |
| segundo | 0:ac1725ba162c | 57 | #include "lwip/igmp.h" |
| segundo | 0:ac1725ba162c | 58 | #include "lwip/dns.h" |
| segundo | 0:ac1725ba162c | 59 | |
| segundo | 0:ac1725ba162c | 60 | |
| segundo | 0:ac1725ba162c | 61 | /** The one and only timeout list */ |
| segundo | 0:ac1725ba162c | 62 | static struct sys_timeo *next_timeout; |
| segundo | 0:ac1725ba162c | 63 | #if NO_SYS |
| segundo | 0:ac1725ba162c | 64 | static u32_t timeouts_last_time; |
| segundo | 0:ac1725ba162c | 65 | #endif /* NO_SYS */ |
| segundo | 0:ac1725ba162c | 66 | |
| segundo | 0:ac1725ba162c | 67 | #if LWIP_TCP |
| segundo | 0:ac1725ba162c | 68 | /** global variable that shows if the tcp timer is currently scheduled or not */ |
| segundo | 0:ac1725ba162c | 69 | static int tcpip_tcp_timer_active; |
| segundo | 0:ac1725ba162c | 70 | |
| segundo | 0:ac1725ba162c | 71 | /** |
| segundo | 0:ac1725ba162c | 72 | * Timer callback function that calls tcp_tmr() and reschedules itself. |
| segundo | 0:ac1725ba162c | 73 | * |
| segundo | 0:ac1725ba162c | 74 | * @param arg unused argument |
| segundo | 0:ac1725ba162c | 75 | */ |
| segundo | 0:ac1725ba162c | 76 | static void |
| segundo | 0:ac1725ba162c | 77 | tcpip_tcp_timer(void *arg) |
| segundo | 0:ac1725ba162c | 78 | { |
| segundo | 0:ac1725ba162c | 79 | LWIP_UNUSED_ARG(arg); |
| segundo | 0:ac1725ba162c | 80 | |
| segundo | 0:ac1725ba162c | 81 | /* call TCP timer handler */ |
| segundo | 0:ac1725ba162c | 82 | tcp_tmr(); |
| segundo | 0:ac1725ba162c | 83 | /* timer still needed? */ |
| segundo | 0:ac1725ba162c | 84 | if (tcp_active_pcbs || tcp_tw_pcbs) { |
| segundo | 0:ac1725ba162c | 85 | /* restart timer */ |
| segundo | 0:ac1725ba162c | 86 | sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL); |
| segundo | 0:ac1725ba162c | 87 | } else { |
| segundo | 0:ac1725ba162c | 88 | /* disable timer */ |
| segundo | 0:ac1725ba162c | 89 | tcpip_tcp_timer_active = 0; |
| segundo | 0:ac1725ba162c | 90 | } |
| segundo | 0:ac1725ba162c | 91 | } |
| segundo | 0:ac1725ba162c | 92 | |
| segundo | 0:ac1725ba162c | 93 | /** |
| segundo | 0:ac1725ba162c | 94 | * Called from TCP_REG when registering a new PCB: |
| segundo | 0:ac1725ba162c | 95 | * the reason is to have the TCP timer only running when |
| segundo | 0:ac1725ba162c | 96 | * there are active (or time-wait) PCBs. |
| segundo | 0:ac1725ba162c | 97 | */ |
| segundo | 0:ac1725ba162c | 98 | void |
| segundo | 0:ac1725ba162c | 99 | tcp_timer_needed(void) |
| segundo | 0:ac1725ba162c | 100 | { |
| segundo | 0:ac1725ba162c | 101 | /* timer is off but needed again? */ |
| segundo | 0:ac1725ba162c | 102 | if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) { |
| segundo | 0:ac1725ba162c | 103 | /* enable and start timer */ |
| segundo | 0:ac1725ba162c | 104 | tcpip_tcp_timer_active = 1; |
| segundo | 0:ac1725ba162c | 105 | sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL); |
| segundo | 0:ac1725ba162c | 106 | } |
| segundo | 0:ac1725ba162c | 107 | } |
| segundo | 0:ac1725ba162c | 108 | #endif /* LWIP_TCP */ |
| segundo | 0:ac1725ba162c | 109 | |
| segundo | 0:ac1725ba162c | 110 | #if IP_REASSEMBLY |
| segundo | 0:ac1725ba162c | 111 | /** |
| segundo | 0:ac1725ba162c | 112 | * Timer callback function that calls ip_reass_tmr() and reschedules itself. |
| segundo | 0:ac1725ba162c | 113 | * |
| segundo | 0:ac1725ba162c | 114 | * @param arg unused argument |
| segundo | 0:ac1725ba162c | 115 | */ |
| segundo | 0:ac1725ba162c | 116 | static void |
| segundo | 0:ac1725ba162c | 117 | ip_reass_timer(void *arg) |
| segundo | 0:ac1725ba162c | 118 | { |
| segundo | 0:ac1725ba162c | 119 | LWIP_UNUSED_ARG(arg); |
| segundo | 0:ac1725ba162c | 120 | LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: ip_reass_tmr()\n")); |
| segundo | 0:ac1725ba162c | 121 | ip_reass_tmr(); |
| segundo | 0:ac1725ba162c | 122 | sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL); |
| segundo | 0:ac1725ba162c | 123 | } |
| segundo | 0:ac1725ba162c | 124 | #endif /* IP_REASSEMBLY */ |
| segundo | 0:ac1725ba162c | 125 | |
| segundo | 0:ac1725ba162c | 126 | #if LWIP_ARP |
| segundo | 0:ac1725ba162c | 127 | /** |
| segundo | 0:ac1725ba162c | 128 | * Timer callback function that calls etharp_tmr() and reschedules itself. |
| segundo | 0:ac1725ba162c | 129 | * |
| segundo | 0:ac1725ba162c | 130 | * @param arg unused argument |
| segundo | 0:ac1725ba162c | 131 | */ |
| segundo | 0:ac1725ba162c | 132 | static void |
| segundo | 0:ac1725ba162c | 133 | arp_timer(void *arg) |
| segundo | 0:ac1725ba162c | 134 | { |
| segundo | 0:ac1725ba162c | 135 | LWIP_UNUSED_ARG(arg); |
| segundo | 0:ac1725ba162c | 136 | LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: etharp_tmr()\n")); |
| segundo | 0:ac1725ba162c | 137 | etharp_tmr(); |
| segundo | 0:ac1725ba162c | 138 | sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL); |
| segundo | 0:ac1725ba162c | 139 | } |
| segundo | 0:ac1725ba162c | 140 | #endif /* LWIP_ARP */ |
| segundo | 0:ac1725ba162c | 141 | |
| segundo | 0:ac1725ba162c | 142 | #if LWIP_DHCP |
| segundo | 0:ac1725ba162c | 143 | /** |
| segundo | 0:ac1725ba162c | 144 | * Timer callback function that calls dhcp_coarse_tmr() and reschedules itself. |
| segundo | 0:ac1725ba162c | 145 | * |
| segundo | 0:ac1725ba162c | 146 | * @param arg unused argument |
| segundo | 0:ac1725ba162c | 147 | */ |
| segundo | 0:ac1725ba162c | 148 | static void |
| segundo | 0:ac1725ba162c | 149 | dhcp_timer_coarse(void *arg) |
| segundo | 0:ac1725ba162c | 150 | { |
| segundo | 0:ac1725ba162c | 151 | LWIP_UNUSED_ARG(arg); |
| segundo | 0:ac1725ba162c | 152 | LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dhcp_coarse_tmr()\n")); |
| segundo | 0:ac1725ba162c | 153 | dhcp_coarse_tmr(); |
| segundo | 0:ac1725ba162c | 154 | sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL); |
| segundo | 0:ac1725ba162c | 155 | } |
| segundo | 0:ac1725ba162c | 156 | |
| segundo | 0:ac1725ba162c | 157 | /** |
| segundo | 0:ac1725ba162c | 158 | * Timer callback function that calls dhcp_fine_tmr() and reschedules itself. |
| segundo | 0:ac1725ba162c | 159 | * |
| segundo | 0:ac1725ba162c | 160 | * @param arg unused argument |
| segundo | 0:ac1725ba162c | 161 | */ |
| segundo | 0:ac1725ba162c | 162 | static void |
| segundo | 0:ac1725ba162c | 163 | dhcp_timer_fine(void *arg) |
| segundo | 0:ac1725ba162c | 164 | { |
| segundo | 0:ac1725ba162c | 165 | LWIP_UNUSED_ARG(arg); |
| segundo | 0:ac1725ba162c | 166 | LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dhcp_fine_tmr()\n")); |
| segundo | 0:ac1725ba162c | 167 | dhcp_fine_tmr(); |
| segundo | 0:ac1725ba162c | 168 | sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL); |
| segundo | 0:ac1725ba162c | 169 | } |
| segundo | 0:ac1725ba162c | 170 | #endif /* LWIP_DHCP */ |
| segundo | 0:ac1725ba162c | 171 | |
| segundo | 0:ac1725ba162c | 172 | #if LWIP_AUTOIP |
| segundo | 0:ac1725ba162c | 173 | /** |
| segundo | 0:ac1725ba162c | 174 | * Timer callback function that calls autoip_tmr() and reschedules itself. |
| segundo | 0:ac1725ba162c | 175 | * |
| segundo | 0:ac1725ba162c | 176 | * @param arg unused argument |
| segundo | 0:ac1725ba162c | 177 | */ |
| segundo | 0:ac1725ba162c | 178 | static void |
| segundo | 0:ac1725ba162c | 179 | autoip_timer(void *arg) |
| segundo | 0:ac1725ba162c | 180 | { |
| segundo | 0:ac1725ba162c | 181 | LWIP_UNUSED_ARG(arg); |
| segundo | 0:ac1725ba162c | 182 | LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: autoip_tmr()\n")); |
| segundo | 0:ac1725ba162c | 183 | autoip_tmr(); |
| segundo | 0:ac1725ba162c | 184 | sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL); |
| segundo | 0:ac1725ba162c | 185 | } |
| segundo | 0:ac1725ba162c | 186 | #endif /* LWIP_AUTOIP */ |
| segundo | 0:ac1725ba162c | 187 | |
| segundo | 0:ac1725ba162c | 188 | #if LWIP_IGMP |
| segundo | 0:ac1725ba162c | 189 | /** |
| segundo | 0:ac1725ba162c | 190 | * Timer callback function that calls igmp_tmr() and reschedules itself. |
| segundo | 0:ac1725ba162c | 191 | * |
| segundo | 0:ac1725ba162c | 192 | * @param arg unused argument |
| segundo | 0:ac1725ba162c | 193 | */ |
| segundo | 0:ac1725ba162c | 194 | static void |
| segundo | 0:ac1725ba162c | 195 | igmp_timer(void *arg) |
| segundo | 0:ac1725ba162c | 196 | { |
| segundo | 0:ac1725ba162c | 197 | LWIP_UNUSED_ARG(arg); |
| segundo | 0:ac1725ba162c | 198 | LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: igmp_tmr()\n")); |
| segundo | 0:ac1725ba162c | 199 | igmp_tmr(); |
| segundo | 0:ac1725ba162c | 200 | sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL); |
| segundo | 0:ac1725ba162c | 201 | } |
| segundo | 0:ac1725ba162c | 202 | #endif /* LWIP_IGMP */ |
| segundo | 0:ac1725ba162c | 203 | |
| segundo | 0:ac1725ba162c | 204 | #if LWIP_DNS |
| segundo | 0:ac1725ba162c | 205 | /** |
| segundo | 0:ac1725ba162c | 206 | * Timer callback function that calls dns_tmr() and reschedules itself. |
| segundo | 0:ac1725ba162c | 207 | * |
| segundo | 0:ac1725ba162c | 208 | * @param arg unused argument |
| segundo | 0:ac1725ba162c | 209 | */ |
| segundo | 0:ac1725ba162c | 210 | static void |
| segundo | 0:ac1725ba162c | 211 | dns_timer(void *arg) |
| segundo | 0:ac1725ba162c | 212 | { |
| segundo | 0:ac1725ba162c | 213 | LWIP_UNUSED_ARG(arg); |
| segundo | 0:ac1725ba162c | 214 | LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dns_tmr()\n")); |
| segundo | 0:ac1725ba162c | 215 | dns_tmr(); |
| segundo | 0:ac1725ba162c | 216 | sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL); |
| segundo | 0:ac1725ba162c | 217 | } |
| segundo | 0:ac1725ba162c | 218 | #endif /* LWIP_DNS */ |
| segundo | 0:ac1725ba162c | 219 | |
| segundo | 0:ac1725ba162c | 220 | /** Initialize this module */ |
| segundo | 0:ac1725ba162c | 221 | void sys_timeouts_init(void) |
| segundo | 0:ac1725ba162c | 222 | { |
| segundo | 3:5a6792c147c0 | 223 | next_timeout = NULL; |
| segundo | 0:ac1725ba162c | 224 | #if IP_REASSEMBLY |
| segundo | 0:ac1725ba162c | 225 | sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL); |
| segundo | 0:ac1725ba162c | 226 | #endif /* IP_REASSEMBLY */ |
| segundo | 0:ac1725ba162c | 227 | #if LWIP_ARP |
| segundo | 0:ac1725ba162c | 228 | sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL); |
| segundo | 0:ac1725ba162c | 229 | #endif /* LWIP_ARP */ |
| segundo | 0:ac1725ba162c | 230 | #if LWIP_DHCP |
| segundo | 0:ac1725ba162c | 231 | sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL); |
| segundo | 0:ac1725ba162c | 232 | sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL); |
| segundo | 0:ac1725ba162c | 233 | #endif /* LWIP_DHCP */ |
| segundo | 0:ac1725ba162c | 234 | #if LWIP_AUTOIP |
| segundo | 0:ac1725ba162c | 235 | sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL); |
| segundo | 0:ac1725ba162c | 236 | #endif /* LWIP_AUTOIP */ |
| segundo | 0:ac1725ba162c | 237 | #if LWIP_IGMP |
| segundo | 0:ac1725ba162c | 238 | sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL); |
| segundo | 0:ac1725ba162c | 239 | #endif /* LWIP_IGMP */ |
| segundo | 0:ac1725ba162c | 240 | #if LWIP_DNS |
| segundo | 0:ac1725ba162c | 241 | sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL); |
| segundo | 0:ac1725ba162c | 242 | #endif /* LWIP_DNS */ |
| segundo | 0:ac1725ba162c | 243 | |
| segundo | 0:ac1725ba162c | 244 | #if NO_SYS |
| segundo | 0:ac1725ba162c | 245 | /* Initialise timestamp for sys_check_timeouts */ |
| segundo | 0:ac1725ba162c | 246 | timeouts_last_time = sys_now(); |
| segundo | 0:ac1725ba162c | 247 | #endif |
| segundo | 0:ac1725ba162c | 248 | } |
| segundo | 0:ac1725ba162c | 249 | |
| segundo | 0:ac1725ba162c | 250 | /** |
| segundo | 0:ac1725ba162c | 251 | * Create a one-shot timer (aka timeout). Timeouts are processed in the |
| segundo | 0:ac1725ba162c | 252 | * following cases: |
| segundo | 0:ac1725ba162c | 253 | * - while waiting for a message using sys_timeouts_mbox_fetch() |
| segundo | 0:ac1725ba162c | 254 | * - by calling sys_check_timeouts() (NO_SYS==1 only) |
| segundo | 0:ac1725ba162c | 255 | * |
| segundo | 0:ac1725ba162c | 256 | * @param msecs time in milliseconds after that the timer should expire |
| segundo | 0:ac1725ba162c | 257 | * @param handler callback function to call when msecs have elapsed |
| segundo | 0:ac1725ba162c | 258 | * @param arg argument to pass to the callback function |
| segundo | 0:ac1725ba162c | 259 | */ |
| segundo | 0:ac1725ba162c | 260 | #if LWIP_DEBUG_TIMERNAMES |
| segundo | 0:ac1725ba162c | 261 | void |
| segundo | 0:ac1725ba162c | 262 | sys_timeout_debug(u32_t msecs, sys_timeout_handler handler, void *arg, const char* handler_name) |
| segundo | 0:ac1725ba162c | 263 | #else /* LWIP_DEBUG_TIMERNAMES */ |
| segundo | 0:ac1725ba162c | 264 | void |
| segundo | 0:ac1725ba162c | 265 | sys_timeout(u32_t msecs, sys_timeout_handler handler, void *arg) |
| segundo | 0:ac1725ba162c | 266 | #endif /* LWIP_DEBUG_TIMERNAMES */ |
| segundo | 0:ac1725ba162c | 267 | { |
| segundo | 0:ac1725ba162c | 268 | struct sys_timeo *timeout, *t; |
| segundo | 0:ac1725ba162c | 269 | |
| segundo | 0:ac1725ba162c | 270 | timeout = (struct sys_timeo *)memp_malloc(MEMP_SYS_TIMEOUT); |
| segundo | 0:ac1725ba162c | 271 | if (timeout == NULL) { |
| segundo | 0:ac1725ba162c | 272 | LWIP_ASSERT("sys_timeout: timeout != NULL, pool MEMP_SYS_TIMEOUT is empty", timeout != NULL); |
| segundo | 0:ac1725ba162c | 273 | return; |
| segundo | 0:ac1725ba162c | 274 | } |
| segundo | 0:ac1725ba162c | 275 | timeout->next = NULL; |
| segundo | 0:ac1725ba162c | 276 | timeout->h = handler; |
| segundo | 0:ac1725ba162c | 277 | timeout->arg = arg; |
| segundo | 0:ac1725ba162c | 278 | timeout->time = msecs; |
| segundo | 0:ac1725ba162c | 279 | #if LWIP_DEBUG_TIMERNAMES |
| segundo | 0:ac1725ba162c | 280 | timeout->handler_name = handler_name; |
| segundo | 0:ac1725ba162c | 281 | LWIP_DEBUGF(TIMERS_DEBUG, ("sys_timeout: %p msecs=%"U32_F" handler=%s arg=%p\n", |
| segundo | 0:ac1725ba162c | 282 | (void *)timeout, msecs, handler_name, (void *)arg)); |
| segundo | 0:ac1725ba162c | 283 | #endif /* LWIP_DEBUG_TIMERNAMES */ |
| segundo | 0:ac1725ba162c | 284 | |
| segundo | 0:ac1725ba162c | 285 | if (next_timeout == NULL) { |
| segundo | 0:ac1725ba162c | 286 | next_timeout = timeout; |
| segundo | 0:ac1725ba162c | 287 | return; |
| segundo | 0:ac1725ba162c | 288 | } |
| segundo | 0:ac1725ba162c | 289 | |
| segundo | 0:ac1725ba162c | 290 | if (next_timeout->time > msecs) { |
| segundo | 0:ac1725ba162c | 291 | next_timeout->time -= msecs; |
| segundo | 0:ac1725ba162c | 292 | timeout->next = next_timeout; |
| segundo | 0:ac1725ba162c | 293 | next_timeout = timeout; |
| segundo | 0:ac1725ba162c | 294 | } else { |
| segundo | 0:ac1725ba162c | 295 | for(t = next_timeout; t != NULL; t = t->next) { |
| segundo | 0:ac1725ba162c | 296 | timeout->time -= t->time; |
| segundo | 0:ac1725ba162c | 297 | if (t->next == NULL || t->next->time > timeout->time) { |
| segundo | 0:ac1725ba162c | 298 | if (t->next != NULL) { |
| segundo | 0:ac1725ba162c | 299 | t->next->time -= timeout->time; |
| segundo | 0:ac1725ba162c | 300 | } |
| segundo | 0:ac1725ba162c | 301 | timeout->next = t->next; |
| segundo | 0:ac1725ba162c | 302 | t->next = timeout; |
| segundo | 0:ac1725ba162c | 303 | break; |
| segundo | 0:ac1725ba162c | 304 | } |
| segundo | 0:ac1725ba162c | 305 | } |
| segundo | 0:ac1725ba162c | 306 | } |
| segundo | 0:ac1725ba162c | 307 | } |
| segundo | 0:ac1725ba162c | 308 | |
| segundo | 0:ac1725ba162c | 309 | /** |
| segundo | 0:ac1725ba162c | 310 | * Go through timeout list (for this task only) and remove the first matching |
| segundo | 0:ac1725ba162c | 311 | * entry, even though the timeout has not triggered yet. |
| segundo | 0:ac1725ba162c | 312 | * |
| segundo | 0:ac1725ba162c | 313 | * @note This function only works as expected if there is only one timeout |
| segundo | 0:ac1725ba162c | 314 | * calling 'handler' in the list of timeouts. |
| segundo | 0:ac1725ba162c | 315 | * |
| segundo | 0:ac1725ba162c | 316 | * @param handler callback function that would be called by the timeout |
| segundo | 0:ac1725ba162c | 317 | * @param arg callback argument that would be passed to handler |
| segundo | 0:ac1725ba162c | 318 | */ |
| segundo | 0:ac1725ba162c | 319 | void |
| segundo | 0:ac1725ba162c | 320 | sys_untimeout(sys_timeout_handler handler, void *arg) |
| segundo | 0:ac1725ba162c | 321 | { |
| segundo | 0:ac1725ba162c | 322 | struct sys_timeo *prev_t, *t; |
| segundo | 0:ac1725ba162c | 323 | |
| segundo | 0:ac1725ba162c | 324 | if (next_timeout == NULL) { |
| segundo | 0:ac1725ba162c | 325 | return; |
| segundo | 0:ac1725ba162c | 326 | } |
| segundo | 0:ac1725ba162c | 327 | |
| segundo | 0:ac1725ba162c | 328 | for (t = next_timeout, prev_t = NULL; t != NULL; prev_t = t, t = t->next) { |
| segundo | 0:ac1725ba162c | 329 | if ((t->h == handler) && (t->arg == arg)) { |
| segundo | 0:ac1725ba162c | 330 | /* We have a match */ |
| segundo | 0:ac1725ba162c | 331 | /* Unlink from previous in list */ |
| segundo | 0:ac1725ba162c | 332 | if (prev_t == NULL) { |
| segundo | 0:ac1725ba162c | 333 | next_timeout = t->next; |
| segundo | 0:ac1725ba162c | 334 | } else { |
| segundo | 0:ac1725ba162c | 335 | prev_t->next = t->next; |
| segundo | 0:ac1725ba162c | 336 | } |
| segundo | 0:ac1725ba162c | 337 | /* If not the last one, add time of this one back to next */ |
| segundo | 0:ac1725ba162c | 338 | if (t->next != NULL) { |
| segundo | 0:ac1725ba162c | 339 | t->next->time += t->time; |
| segundo | 0:ac1725ba162c | 340 | } |
| segundo | 0:ac1725ba162c | 341 | memp_free(MEMP_SYS_TIMEOUT, t); |
| segundo | 0:ac1725ba162c | 342 | return; |
| segundo | 0:ac1725ba162c | 343 | } |
| segundo | 0:ac1725ba162c | 344 | } |
| segundo | 0:ac1725ba162c | 345 | return; |
| segundo | 0:ac1725ba162c | 346 | } |
| segundo | 0:ac1725ba162c | 347 | |
| segundo | 0:ac1725ba162c | 348 | #if NO_SYS |
| segundo | 0:ac1725ba162c | 349 | |
| segundo | 0:ac1725ba162c | 350 | /** Handle timeouts for NO_SYS==1 (i.e. without using |
| segundo | 0:ac1725ba162c | 351 | * tcpip_thread/sys_timeouts_mbox_fetch(). Uses sys_now() to call timeout |
| segundo | 0:ac1725ba162c | 352 | * handler functions when timeouts expire. |
| segundo | 0:ac1725ba162c | 353 | * |
| segundo | 0:ac1725ba162c | 354 | * Must be called periodically from your main loop. |
| segundo | 0:ac1725ba162c | 355 | */ |
| segundo | 0:ac1725ba162c | 356 | void |
| segundo | 0:ac1725ba162c | 357 | sys_check_timeouts(void) |
| segundo | 0:ac1725ba162c | 358 | { |
| segundo | 0:ac1725ba162c | 359 | struct sys_timeo *tmptimeout; |
| segundo | 0:ac1725ba162c | 360 | u32_t diff; |
| segundo | 0:ac1725ba162c | 361 | sys_timeout_handler handler; |
| segundo | 0:ac1725ba162c | 362 | void *arg; |
| segundo | 0:ac1725ba162c | 363 | int had_one; |
| segundo | 0:ac1725ba162c | 364 | u32_t now; |
| segundo | 0:ac1725ba162c | 365 | |
| segundo | 0:ac1725ba162c | 366 | now = sys_now(); |
| segundo | 0:ac1725ba162c | 367 | if (next_timeout) { |
| segundo | 0:ac1725ba162c | 368 | /* this cares for wraparounds */ |
| segundo | 0:ac1725ba162c | 369 | diff = LWIP_U32_DIFF(now, timeouts_last_time); |
| segundo | 0:ac1725ba162c | 370 | do |
| segundo | 0:ac1725ba162c | 371 | { |
| segundo | 0:ac1725ba162c | 372 | had_one = 0; |
| segundo | 0:ac1725ba162c | 373 | tmptimeout = next_timeout; |
| segundo | 0:ac1725ba162c | 374 | if (tmptimeout->time <= diff) { |
| segundo | 0:ac1725ba162c | 375 | /* timeout has expired */ |
| segundo | 0:ac1725ba162c | 376 | had_one = 1; |
| segundo | 0:ac1725ba162c | 377 | timeouts_last_time = now; |
| segundo | 0:ac1725ba162c | 378 | diff -= tmptimeout->time; |
| segundo | 0:ac1725ba162c | 379 | next_timeout = tmptimeout->next; |
| segundo | 0:ac1725ba162c | 380 | handler = tmptimeout->h; |
| segundo | 0:ac1725ba162c | 381 | arg = tmptimeout->arg; |
| segundo | 0:ac1725ba162c | 382 | #if LWIP_DEBUG_TIMERNAMES |
| segundo | 0:ac1725ba162c | 383 | if (handler != NULL) { |
| segundo | 0:ac1725ba162c | 384 | LWIP_DEBUGF(TIMERS_DEBUG, ("sct calling h=%s arg=%p\n", |
| segundo | 0:ac1725ba162c | 385 | tmptimeout->handler_name, arg)); |
| segundo | 0:ac1725ba162c | 386 | } |
| segundo | 0:ac1725ba162c | 387 | #endif /* LWIP_DEBUG_TIMERNAMES */ |
| segundo | 0:ac1725ba162c | 388 | memp_free(MEMP_SYS_TIMEOUT, tmptimeout); |
| segundo | 0:ac1725ba162c | 389 | if (handler != NULL) { |
| segundo | 0:ac1725ba162c | 390 | handler(arg); |
| segundo | 0:ac1725ba162c | 391 | } |
| segundo | 0:ac1725ba162c | 392 | } |
| segundo | 0:ac1725ba162c | 393 | /* repeat until all expired timers have been called */ |
| segundo | 0:ac1725ba162c | 394 | }while(had_one); |
| segundo | 0:ac1725ba162c | 395 | } |
| segundo | 0:ac1725ba162c | 396 | } |
| segundo | 0:ac1725ba162c | 397 | |
| segundo | 0:ac1725ba162c | 398 | /** Set back the timestamp of the last call to sys_check_timeouts() |
| segundo | 0:ac1725ba162c | 399 | * This is necessary if sys_check_timeouts() hasn't been called for a long |
| segundo | 0:ac1725ba162c | 400 | * time (e.g. while saving energy) to prevent all timer functions of that |
| segundo | 0:ac1725ba162c | 401 | * period being called. |
| segundo | 0:ac1725ba162c | 402 | */ |
| segundo | 0:ac1725ba162c | 403 | void |
| segundo | 0:ac1725ba162c | 404 | sys_restart_timeouts(void) |
| segundo | 0:ac1725ba162c | 405 | { |
| segundo | 0:ac1725ba162c | 406 | timeouts_last_time = sys_now(); |
| segundo | 0:ac1725ba162c | 407 | } |
| segundo | 0:ac1725ba162c | 408 | |
| segundo | 0:ac1725ba162c | 409 | #else /* NO_SYS */ |
| segundo | 0:ac1725ba162c | 410 | |
| segundo | 0:ac1725ba162c | 411 | /** |
| segundo | 0:ac1725ba162c | 412 | * Wait (forever) for a message to arrive in an mbox. |
| segundo | 0:ac1725ba162c | 413 | * While waiting, timeouts are processed. |
| segundo | 0:ac1725ba162c | 414 | * |
| segundo | 0:ac1725ba162c | 415 | * @param mbox the mbox to fetch the message from |
| segundo | 0:ac1725ba162c | 416 | * @param msg the place to store the message |
| segundo | 0:ac1725ba162c | 417 | */ |
| segundo | 0:ac1725ba162c | 418 | void |
| segundo | 0:ac1725ba162c | 419 | sys_timeouts_mbox_fetch(sys_mbox_t *mbox, void **msg) |
| segundo | 0:ac1725ba162c | 420 | { |
| segundo | 0:ac1725ba162c | 421 | u32_t time_needed; |
| segundo | 0:ac1725ba162c | 422 | struct sys_timeo *tmptimeout; |
| segundo | 0:ac1725ba162c | 423 | sys_timeout_handler handler; |
| segundo | 0:ac1725ba162c | 424 | void *arg; |
| segundo | 0:ac1725ba162c | 425 | |
| segundo | 0:ac1725ba162c | 426 | again: |
| segundo | 0:ac1725ba162c | 427 | if (!next_timeout) { |
| segundo | 0:ac1725ba162c | 428 | time_needed = sys_arch_mbox_fetch(mbox, msg, 0); |
| segundo | 0:ac1725ba162c | 429 | } else { |
| segundo | 0:ac1725ba162c | 430 | if (next_timeout->time > 0) { |
| segundo | 0:ac1725ba162c | 431 | time_needed = sys_arch_mbox_fetch(mbox, msg, next_timeout->time); |
| segundo | 0:ac1725ba162c | 432 | } else { |
| segundo | 0:ac1725ba162c | 433 | time_needed = SYS_ARCH_TIMEOUT; |
| segundo | 0:ac1725ba162c | 434 | } |
| segundo | 0:ac1725ba162c | 435 | |
| segundo | 0:ac1725ba162c | 436 | if (time_needed == SYS_ARCH_TIMEOUT) { |
| segundo | 0:ac1725ba162c | 437 | /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message |
| segundo | 0:ac1725ba162c | 438 | could be fetched. We should now call the timeout handler and |
| segundo | 0:ac1725ba162c | 439 | deallocate the memory allocated for the timeout. */ |
| segundo | 0:ac1725ba162c | 440 | tmptimeout = next_timeout; |
| segundo | 0:ac1725ba162c | 441 | next_timeout = tmptimeout->next; |
| segundo | 0:ac1725ba162c | 442 | handler = tmptimeout->h; |
| segundo | 0:ac1725ba162c | 443 | arg = tmptimeout->arg; |
| segundo | 0:ac1725ba162c | 444 | #if LWIP_DEBUG_TIMERNAMES |
| segundo | 0:ac1725ba162c | 445 | if (handler != NULL) { |
| segundo | 0:ac1725ba162c | 446 | LWIP_DEBUGF(TIMERS_DEBUG, ("stmf calling h=%s arg=%p\n", |
| segundo | 0:ac1725ba162c | 447 | tmptimeout->handler_name, arg)); |
| segundo | 0:ac1725ba162c | 448 | } |
| segundo | 0:ac1725ba162c | 449 | #endif /* LWIP_DEBUG_TIMERNAMES */ |
| segundo | 0:ac1725ba162c | 450 | memp_free(MEMP_SYS_TIMEOUT, tmptimeout); |
| segundo | 0:ac1725ba162c | 451 | if (handler != NULL) { |
| segundo | 0:ac1725ba162c | 452 | /* For LWIP_TCPIP_CORE_LOCKING, lock the core before calling the |
| segundo | 0:ac1725ba162c | 453 | timeout handler function. */ |
| segundo | 0:ac1725ba162c | 454 | LOCK_TCPIP_CORE(); |
| segundo | 0:ac1725ba162c | 455 | handler(arg); |
| segundo | 0:ac1725ba162c | 456 | UNLOCK_TCPIP_CORE(); |
| segundo | 0:ac1725ba162c | 457 | } |
| segundo | 0:ac1725ba162c | 458 | LWIP_TCPIP_THREAD_ALIVE(); |
| segundo | 0:ac1725ba162c | 459 | |
| segundo | 0:ac1725ba162c | 460 | /* We try again to fetch a message from the mbox. */ |
| segundo | 0:ac1725ba162c | 461 | goto again; |
| segundo | 0:ac1725ba162c | 462 | } else { |
| segundo | 0:ac1725ba162c | 463 | /* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout |
| segundo | 0:ac1725ba162c | 464 | occured. The time variable is set to the number of |
| segundo | 0:ac1725ba162c | 465 | milliseconds we waited for the message. */ |
| segundo | 0:ac1725ba162c | 466 | if (time_needed < next_timeout->time) { |
| segundo | 0:ac1725ba162c | 467 | next_timeout->time -= time_needed; |
| segundo | 0:ac1725ba162c | 468 | } else { |
| segundo | 0:ac1725ba162c | 469 | next_timeout->time = 0; |
| segundo | 0:ac1725ba162c | 470 | } |
| segundo | 0:ac1725ba162c | 471 | } |
| segundo | 0:ac1725ba162c | 472 | } |
| segundo | 0:ac1725ba162c | 473 | } |
| segundo | 0:ac1725ba162c | 474 | |
| segundo | 0:ac1725ba162c | 475 | #endif /* NO_SYS */ |
| segundo | 0:ac1725ba162c | 476 | |
| segundo | 0:ac1725ba162c | 477 | #else /* LWIP_TIMERS */ |
| segundo | 0:ac1725ba162c | 478 | /* Satisfy the TCP code which calls this function */ |
| segundo | 0:ac1725ba162c | 479 | void |
| segundo | 0:ac1725ba162c | 480 | tcp_timer_needed(void) |
| segundo | 0:ac1725ba162c | 481 | { |
| segundo | 0:ac1725ba162c | 482 | } |
| segundo | 0:ac1725ba162c | 483 | #endif /* LWIP_TIMERS */ |