Pehr Hovey
Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed
Core/lwIP/core/sys.c@0:a548a085de55, 2010-03-14 (annotated)
- Committer:
- pehrhovey
- Date:
- Sun Mar 14 00:54:12 2010 +0000
- Revision:
- 0:a548a085de55
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| pehrhovey | 0:a548a085de55 | 1 | /** |
| pehrhovey | 0:a548a085de55 | 2 | * @file |
| pehrhovey | 0:a548a085de55 | 3 | * lwIP Operating System abstraction |
| pehrhovey | 0:a548a085de55 | 4 | * |
| pehrhovey | 0:a548a085de55 | 5 | */ |
| pehrhovey | 0:a548a085de55 | 6 | |
| pehrhovey | 0:a548a085de55 | 7 | /* |
| pehrhovey | 0:a548a085de55 | 8 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| pehrhovey | 0:a548a085de55 | 9 | * All rights reserved. |
| pehrhovey | 0:a548a085de55 | 10 | * |
| pehrhovey | 0:a548a085de55 | 11 | * Redistribution and use in source and binary forms, with or without modification, |
| pehrhovey | 0:a548a085de55 | 12 | * are permitted provided that the following conditions are met: |
| pehrhovey | 0:a548a085de55 | 13 | * |
| pehrhovey | 0:a548a085de55 | 14 | * 1. Redistributions of source code must retain the above copyright notice, |
| pehrhovey | 0:a548a085de55 | 15 | * this list of conditions and the following disclaimer. |
| pehrhovey | 0:a548a085de55 | 16 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| pehrhovey | 0:a548a085de55 | 17 | * this list of conditions and the following disclaimer in the documentation |
| pehrhovey | 0:a548a085de55 | 18 | * and/or other materials provided with the distribution. |
| pehrhovey | 0:a548a085de55 | 19 | * 3. The name of the author may not be used to endorse or promote products |
| pehrhovey | 0:a548a085de55 | 20 | * derived from this software without specific prior written permission. |
| pehrhovey | 0:a548a085de55 | 21 | * |
| pehrhovey | 0:a548a085de55 | 22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| pehrhovey | 0:a548a085de55 | 23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| pehrhovey | 0:a548a085de55 | 24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| pehrhovey | 0:a548a085de55 | 25 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| pehrhovey | 0:a548a085de55 | 26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| pehrhovey | 0:a548a085de55 | 27 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| pehrhovey | 0:a548a085de55 | 28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| pehrhovey | 0:a548a085de55 | 29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| pehrhovey | 0:a548a085de55 | 30 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| pehrhovey | 0:a548a085de55 | 31 | * OF SUCH DAMAGE. |
| pehrhovey | 0:a548a085de55 | 32 | * |
| pehrhovey | 0:a548a085de55 | 33 | * This file is part of the lwIP TCP/IP stack. |
| pehrhovey | 0:a548a085de55 | 34 | * |
| pehrhovey | 0:a548a085de55 | 35 | * Author: Adam Dunkels <adam@sics.se> |
| pehrhovey | 0:a548a085de55 | 36 | * |
| pehrhovey | 0:a548a085de55 | 37 | */ |
| pehrhovey | 0:a548a085de55 | 38 | |
| pehrhovey | 0:a548a085de55 | 39 | #include "lwip/opt.h" |
| pehrhovey | 0:a548a085de55 | 40 | |
| pehrhovey | 0:a548a085de55 | 41 | #if (NO_SYS == 0) /* don't build if not configured for use in lwipopts.h */ |
| pehrhovey | 0:a548a085de55 | 42 | |
| pehrhovey | 0:a548a085de55 | 43 | #include "lwip/sys.h" |
| pehrhovey | 0:a548a085de55 | 44 | #include "lwip/def.h" |
| pehrhovey | 0:a548a085de55 | 45 | #include "lwip/memp.h" |
| pehrhovey | 0:a548a085de55 | 46 | #include "lwip/tcpip.h" |
| pehrhovey | 0:a548a085de55 | 47 | |
| pehrhovey | 0:a548a085de55 | 48 | /** |
| pehrhovey | 0:a548a085de55 | 49 | * Struct used for sys_sem_wait_timeout() to tell wether the time |
| pehrhovey | 0:a548a085de55 | 50 | * has run out or the semaphore has really become available. |
| pehrhovey | 0:a548a085de55 | 51 | */ |
| pehrhovey | 0:a548a085de55 | 52 | struct sswt_cb |
| pehrhovey | 0:a548a085de55 | 53 | { |
| pehrhovey | 0:a548a085de55 | 54 | s16_t timeflag; |
| pehrhovey | 0:a548a085de55 | 55 | sys_sem_t *psem; |
| pehrhovey | 0:a548a085de55 | 56 | }; |
| pehrhovey | 0:a548a085de55 | 57 | |
| pehrhovey | 0:a548a085de55 | 58 | /** |
| pehrhovey | 0:a548a085de55 | 59 | * Wait (forever) for a message to arrive in an mbox. |
| pehrhovey | 0:a548a085de55 | 60 | * While waiting, timeouts (for this thread) are processed. |
| pehrhovey | 0:a548a085de55 | 61 | * |
| pehrhovey | 0:a548a085de55 | 62 | * @param mbox the mbox to fetch the message from |
| pehrhovey | 0:a548a085de55 | 63 | * @param msg the place to store the message |
| pehrhovey | 0:a548a085de55 | 64 | */ |
| pehrhovey | 0:a548a085de55 | 65 | void |
| pehrhovey | 0:a548a085de55 | 66 | sys_mbox_fetch(sys_mbox_t mbox, void **msg) |
| pehrhovey | 0:a548a085de55 | 67 | { |
| pehrhovey | 0:a548a085de55 | 68 | u32_t time_needed; |
| pehrhovey | 0:a548a085de55 | 69 | struct sys_timeouts *timeouts; |
| pehrhovey | 0:a548a085de55 | 70 | struct sys_timeo *tmptimeout; |
| pehrhovey | 0:a548a085de55 | 71 | sys_timeout_handler h; |
| pehrhovey | 0:a548a085de55 | 72 | void *arg; |
| pehrhovey | 0:a548a085de55 | 73 | |
| pehrhovey | 0:a548a085de55 | 74 | again: |
| pehrhovey | 0:a548a085de55 | 75 | timeouts = sys_arch_timeouts(); |
| pehrhovey | 0:a548a085de55 | 76 | |
| pehrhovey | 0:a548a085de55 | 77 | if (!timeouts || !timeouts->next) { |
| pehrhovey | 0:a548a085de55 | 78 | UNLOCK_TCPIP_CORE(); |
| pehrhovey | 0:a548a085de55 | 79 | time_needed = sys_arch_mbox_fetch(mbox, msg, 0); |
| pehrhovey | 0:a548a085de55 | 80 | LOCK_TCPIP_CORE(); |
| pehrhovey | 0:a548a085de55 | 81 | } else { |
| pehrhovey | 0:a548a085de55 | 82 | if (timeouts->next->time > 0) { |
| pehrhovey | 0:a548a085de55 | 83 | UNLOCK_TCPIP_CORE(); |
| pehrhovey | 0:a548a085de55 | 84 | time_needed = sys_arch_mbox_fetch(mbox, msg, timeouts->next->time); |
| pehrhovey | 0:a548a085de55 | 85 | LOCK_TCPIP_CORE(); |
| pehrhovey | 0:a548a085de55 | 86 | } else { |
| pehrhovey | 0:a548a085de55 | 87 | time_needed = SYS_ARCH_TIMEOUT; |
| pehrhovey | 0:a548a085de55 | 88 | } |
| pehrhovey | 0:a548a085de55 | 89 | |
| pehrhovey | 0:a548a085de55 | 90 | if (time_needed == SYS_ARCH_TIMEOUT) { |
| pehrhovey | 0:a548a085de55 | 91 | /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message |
| pehrhovey | 0:a548a085de55 | 92 | could be fetched. We should now call the timeout handler and |
| pehrhovey | 0:a548a085de55 | 93 | deallocate the memory allocated for the timeout. */ |
| pehrhovey | 0:a548a085de55 | 94 | tmptimeout = timeouts->next; |
| pehrhovey | 0:a548a085de55 | 95 | timeouts->next = tmptimeout->next; |
| pehrhovey | 0:a548a085de55 | 96 | h = tmptimeout->h; |
| pehrhovey | 0:a548a085de55 | 97 | arg = tmptimeout->arg; |
| pehrhovey | 0:a548a085de55 | 98 | memp_free(MEMP_SYS_TIMEOUT, tmptimeout); |
| pehrhovey | 0:a548a085de55 | 99 | if (h != NULL) { |
| pehrhovey | 0:a548a085de55 | 100 | LWIP_DEBUGF(SYS_DEBUG, ("smf calling h=%p(%p)\n", (void*)&h, arg)); |
| pehrhovey | 0:a548a085de55 | 101 | h(arg); |
| pehrhovey | 0:a548a085de55 | 102 | } |
| pehrhovey | 0:a548a085de55 | 103 | |
| pehrhovey | 0:a548a085de55 | 104 | /* We try again to fetch a message from the mbox. */ |
| pehrhovey | 0:a548a085de55 | 105 | goto again; |
| pehrhovey | 0:a548a085de55 | 106 | } else { |
| pehrhovey | 0:a548a085de55 | 107 | /* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout |
| pehrhovey | 0:a548a085de55 | 108 | occured. The time variable is set to the number of |
| pehrhovey | 0:a548a085de55 | 109 | milliseconds we waited for the message. */ |
| pehrhovey | 0:a548a085de55 | 110 | if (time_needed < timeouts->next->time) { |
| pehrhovey | 0:a548a085de55 | 111 | timeouts->next->time -= time_needed; |
| pehrhovey | 0:a548a085de55 | 112 | } else { |
| pehrhovey | 0:a548a085de55 | 113 | timeouts->next->time = 0; |
| pehrhovey | 0:a548a085de55 | 114 | } |
| pehrhovey | 0:a548a085de55 | 115 | } |
| pehrhovey | 0:a548a085de55 | 116 | } |
| pehrhovey | 0:a548a085de55 | 117 | } |
| pehrhovey | 0:a548a085de55 | 118 | |
| pehrhovey | 0:a548a085de55 | 119 | /** |
| pehrhovey | 0:a548a085de55 | 120 | * Wait (forever) for a semaphore to become available. |
| pehrhovey | 0:a548a085de55 | 121 | * While waiting, timeouts (for this thread) are processed. |
| pehrhovey | 0:a548a085de55 | 122 | * |
| pehrhovey | 0:a548a085de55 | 123 | * @param sem semaphore to wait for |
| pehrhovey | 0:a548a085de55 | 124 | */ |
| pehrhovey | 0:a548a085de55 | 125 | void |
| pehrhovey | 0:a548a085de55 | 126 | sys_sem_wait(sys_sem_t sem) |
| pehrhovey | 0:a548a085de55 | 127 | { |
| pehrhovey | 0:a548a085de55 | 128 | u32_t time_needed; |
| pehrhovey | 0:a548a085de55 | 129 | struct sys_timeouts *timeouts; |
| pehrhovey | 0:a548a085de55 | 130 | struct sys_timeo *tmptimeout; |
| pehrhovey | 0:a548a085de55 | 131 | sys_timeout_handler h; |
| pehrhovey | 0:a548a085de55 | 132 | void *arg; |
| pehrhovey | 0:a548a085de55 | 133 | |
| pehrhovey | 0:a548a085de55 | 134 | again: |
| pehrhovey | 0:a548a085de55 | 135 | |
| pehrhovey | 0:a548a085de55 | 136 | timeouts = sys_arch_timeouts(); |
| pehrhovey | 0:a548a085de55 | 137 | |
| pehrhovey | 0:a548a085de55 | 138 | if (!timeouts || !timeouts->next) { |
| pehrhovey | 0:a548a085de55 | 139 | sys_arch_sem_wait(sem, 0); |
| pehrhovey | 0:a548a085de55 | 140 | } else { |
| pehrhovey | 0:a548a085de55 | 141 | if (timeouts->next->time > 0) { |
| pehrhovey | 0:a548a085de55 | 142 | time_needed = sys_arch_sem_wait(sem, timeouts->next->time); |
| pehrhovey | 0:a548a085de55 | 143 | } else { |
| pehrhovey | 0:a548a085de55 | 144 | time_needed = SYS_ARCH_TIMEOUT; |
| pehrhovey | 0:a548a085de55 | 145 | } |
| pehrhovey | 0:a548a085de55 | 146 | |
| pehrhovey | 0:a548a085de55 | 147 | if (time_needed == SYS_ARCH_TIMEOUT) { |
| pehrhovey | 0:a548a085de55 | 148 | /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message |
| pehrhovey | 0:a548a085de55 | 149 | could be fetched. We should now call the timeout handler and |
| pehrhovey | 0:a548a085de55 | 150 | deallocate the memory allocated for the timeout. */ |
| pehrhovey | 0:a548a085de55 | 151 | tmptimeout = timeouts->next; |
| pehrhovey | 0:a548a085de55 | 152 | timeouts->next = tmptimeout->next; |
| pehrhovey | 0:a548a085de55 | 153 | h = tmptimeout->h; |
| pehrhovey | 0:a548a085de55 | 154 | arg = tmptimeout->arg; |
| pehrhovey | 0:a548a085de55 | 155 | memp_free(MEMP_SYS_TIMEOUT, tmptimeout); |
| pehrhovey | 0:a548a085de55 | 156 | if (h != NULL) { |
| pehrhovey | 0:a548a085de55 | 157 | LWIP_DEBUGF(SYS_DEBUG, ("ssw h=%p(%p)\n", (void*)&h, (void *)arg)); |
| pehrhovey | 0:a548a085de55 | 158 | h(arg); |
| pehrhovey | 0:a548a085de55 | 159 | } |
| pehrhovey | 0:a548a085de55 | 160 | |
| pehrhovey | 0:a548a085de55 | 161 | /* We try again to fetch a message from the mbox. */ |
| pehrhovey | 0:a548a085de55 | 162 | goto again; |
| pehrhovey | 0:a548a085de55 | 163 | } else { |
| pehrhovey | 0:a548a085de55 | 164 | /* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout |
| pehrhovey | 0:a548a085de55 | 165 | occured. The time variable is set to the number of |
| pehrhovey | 0:a548a085de55 | 166 | milliseconds we waited for the message. */ |
| pehrhovey | 0:a548a085de55 | 167 | if (time_needed < timeouts->next->time) { |
| pehrhovey | 0:a548a085de55 | 168 | timeouts->next->time -= time_needed; |
| pehrhovey | 0:a548a085de55 | 169 | } else { |
| pehrhovey | 0:a548a085de55 | 170 | timeouts->next->time = 0; |
| pehrhovey | 0:a548a085de55 | 171 | } |
| pehrhovey | 0:a548a085de55 | 172 | } |
| pehrhovey | 0:a548a085de55 | 173 | } |
| pehrhovey | 0:a548a085de55 | 174 | } |
| pehrhovey | 0:a548a085de55 | 175 | |
| pehrhovey | 0:a548a085de55 | 176 | /** |
| pehrhovey | 0:a548a085de55 | 177 | * Create a one-shot timer (aka timeout). Timeouts are processed in the |
| pehrhovey | 0:a548a085de55 | 178 | * following cases: |
| pehrhovey | 0:a548a085de55 | 179 | * - while waiting for a message using sys_mbox_fetch() |
| pehrhovey | 0:a548a085de55 | 180 | * - while waiting for a semaphore using sys_sem_wait() or sys_sem_wait_timeout() |
| pehrhovey | 0:a548a085de55 | 181 | * - while sleeping using the inbuilt sys_msleep() |
| pehrhovey | 0:a548a085de55 | 182 | * |
| pehrhovey | 0:a548a085de55 | 183 | * @param msecs time in milliseconds after that the timer should expire |
| pehrhovey | 0:a548a085de55 | 184 | * @param h callback function to call when msecs have elapsed |
| pehrhovey | 0:a548a085de55 | 185 | * @param arg argument to pass to the callback function |
| pehrhovey | 0:a548a085de55 | 186 | */ |
| pehrhovey | 0:a548a085de55 | 187 | void |
| pehrhovey | 0:a548a085de55 | 188 | sys_timeout(u32_t msecs, sys_timeout_handler h, void *arg) |
| pehrhovey | 0:a548a085de55 | 189 | { |
| pehrhovey | 0:a548a085de55 | 190 | struct sys_timeouts *timeouts; |
| pehrhovey | 0:a548a085de55 | 191 | struct sys_timeo *timeout, *t; |
| pehrhovey | 0:a548a085de55 | 192 | |
| pehrhovey | 0:a548a085de55 | 193 | timeout = memp_malloc(MEMP_SYS_TIMEOUT); |
| pehrhovey | 0:a548a085de55 | 194 | if (timeout == NULL) { |
| pehrhovey | 0:a548a085de55 | 195 | LWIP_ASSERT("sys_timeout: timeout != NULL", timeout != NULL); |
| pehrhovey | 0:a548a085de55 | 196 | return; |
| pehrhovey | 0:a548a085de55 | 197 | } |
| pehrhovey | 0:a548a085de55 | 198 | timeout->next = NULL; |
| pehrhovey | 0:a548a085de55 | 199 | timeout->h = h; |
| pehrhovey | 0:a548a085de55 | 200 | timeout->arg = arg; |
| pehrhovey | 0:a548a085de55 | 201 | timeout->time = msecs; |
| pehrhovey | 0:a548a085de55 | 202 | |
| pehrhovey | 0:a548a085de55 | 203 | timeouts = sys_arch_timeouts(); |
| pehrhovey | 0:a548a085de55 | 204 | |
| pehrhovey | 0:a548a085de55 | 205 | LWIP_DEBUGF(SYS_DEBUG, ("sys_timeout: %p msecs=%"U32_F" h=%p arg=%p\n", |
| pehrhovey | 0:a548a085de55 | 206 | (void *)timeout, msecs, (void*)&h, (void *)arg)); |
| pehrhovey | 0:a548a085de55 | 207 | |
| pehrhovey | 0:a548a085de55 | 208 | if (timeouts == NULL) { |
| pehrhovey | 0:a548a085de55 | 209 | LWIP_ASSERT("sys_timeout: timeouts != NULL", timeouts != NULL); |
| pehrhovey | 0:a548a085de55 | 210 | return; |
| pehrhovey | 0:a548a085de55 | 211 | } |
| pehrhovey | 0:a548a085de55 | 212 | |
| pehrhovey | 0:a548a085de55 | 213 | if (timeouts->next == NULL) { |
| pehrhovey | 0:a548a085de55 | 214 | timeouts->next = timeout; |
| pehrhovey | 0:a548a085de55 | 215 | return; |
| pehrhovey | 0:a548a085de55 | 216 | } |
| pehrhovey | 0:a548a085de55 | 217 | |
| pehrhovey | 0:a548a085de55 | 218 | if (timeouts->next->time > msecs) { |
| pehrhovey | 0:a548a085de55 | 219 | timeouts->next->time -= msecs; |
| pehrhovey | 0:a548a085de55 | 220 | timeout->next = timeouts->next; |
| pehrhovey | 0:a548a085de55 | 221 | timeouts->next = timeout; |
| pehrhovey | 0:a548a085de55 | 222 | } else { |
| pehrhovey | 0:a548a085de55 | 223 | for(t = timeouts->next; t != NULL; t = t->next) { |
| pehrhovey | 0:a548a085de55 | 224 | timeout->time -= t->time; |
| pehrhovey | 0:a548a085de55 | 225 | if (t->next == NULL || t->next->time > timeout->time) { |
| pehrhovey | 0:a548a085de55 | 226 | if (t->next != NULL) { |
| pehrhovey | 0:a548a085de55 | 227 | t->next->time -= timeout->time; |
| pehrhovey | 0:a548a085de55 | 228 | } |
| pehrhovey | 0:a548a085de55 | 229 | timeout->next = t->next; |
| pehrhovey | 0:a548a085de55 | 230 | t->next = timeout; |
| pehrhovey | 0:a548a085de55 | 231 | break; |
| pehrhovey | 0:a548a085de55 | 232 | } |
| pehrhovey | 0:a548a085de55 | 233 | } |
| pehrhovey | 0:a548a085de55 | 234 | } |
| pehrhovey | 0:a548a085de55 | 235 | } |
| pehrhovey | 0:a548a085de55 | 236 | |
| pehrhovey | 0:a548a085de55 | 237 | /** |
| pehrhovey | 0:a548a085de55 | 238 | * Go through timeout list (for this task only) and remove the first matching |
| pehrhovey | 0:a548a085de55 | 239 | * entry, even though the timeout has not triggered yet. |
| pehrhovey | 0:a548a085de55 | 240 | * |
| pehrhovey | 0:a548a085de55 | 241 | * @note This function only works as expected if there is only one timeout |
| pehrhovey | 0:a548a085de55 | 242 | * calling 'h' in the list of timeouts. |
| pehrhovey | 0:a548a085de55 | 243 | * |
| pehrhovey | 0:a548a085de55 | 244 | * @param h callback function that would be called by the timeout |
| pehrhovey | 0:a548a085de55 | 245 | * @param arg callback argument that would be passed to h |
| pehrhovey | 0:a548a085de55 | 246 | */ |
| pehrhovey | 0:a548a085de55 | 247 | void |
| pehrhovey | 0:a548a085de55 | 248 | sys_untimeout(sys_timeout_handler h, void *arg) |
| pehrhovey | 0:a548a085de55 | 249 | { |
| pehrhovey | 0:a548a085de55 | 250 | struct sys_timeouts *timeouts; |
| pehrhovey | 0:a548a085de55 | 251 | struct sys_timeo *prev_t, *t; |
| pehrhovey | 0:a548a085de55 | 252 | |
| pehrhovey | 0:a548a085de55 | 253 | timeouts = sys_arch_timeouts(); |
| pehrhovey | 0:a548a085de55 | 254 | |
| pehrhovey | 0:a548a085de55 | 255 | if (timeouts == NULL) { |
| pehrhovey | 0:a548a085de55 | 256 | LWIP_ASSERT("sys_untimeout: timeouts != NULL", timeouts != NULL); |
| pehrhovey | 0:a548a085de55 | 257 | return; |
| pehrhovey | 0:a548a085de55 | 258 | } |
| pehrhovey | 0:a548a085de55 | 259 | if (timeouts->next == NULL) { |
| pehrhovey | 0:a548a085de55 | 260 | return; |
| pehrhovey | 0:a548a085de55 | 261 | } |
| pehrhovey | 0:a548a085de55 | 262 | |
| pehrhovey | 0:a548a085de55 | 263 | for (t = timeouts->next, prev_t = NULL; t != NULL; prev_t = t, t = t->next) { |
| pehrhovey | 0:a548a085de55 | 264 | if ((t->h == h) && (t->arg == arg)) { |
| pehrhovey | 0:a548a085de55 | 265 | /* We have a match */ |
| pehrhovey | 0:a548a085de55 | 266 | /* Unlink from previous in list */ |
| pehrhovey | 0:a548a085de55 | 267 | if (prev_t == NULL) |
| pehrhovey | 0:a548a085de55 | 268 | timeouts->next = t->next; |
| pehrhovey | 0:a548a085de55 | 269 | else |
| pehrhovey | 0:a548a085de55 | 270 | prev_t->next = t->next; |
| pehrhovey | 0:a548a085de55 | 271 | /* If not the last one, add time of this one back to next */ |
| pehrhovey | 0:a548a085de55 | 272 | if (t->next != NULL) |
| pehrhovey | 0:a548a085de55 | 273 | t->next->time += t->time; |
| pehrhovey | 0:a548a085de55 | 274 | memp_free(MEMP_SYS_TIMEOUT, t); |
| pehrhovey | 0:a548a085de55 | 275 | return; |
| pehrhovey | 0:a548a085de55 | 276 | } |
| pehrhovey | 0:a548a085de55 | 277 | } |
| pehrhovey | 0:a548a085de55 | 278 | return; |
| pehrhovey | 0:a548a085de55 | 279 | } |
| pehrhovey | 0:a548a085de55 | 280 | |
| pehrhovey | 0:a548a085de55 | 281 | /** |
| pehrhovey | 0:a548a085de55 | 282 | * Timeout handler function for sys_sem_wait_timeout() |
| pehrhovey | 0:a548a085de55 | 283 | * |
| pehrhovey | 0:a548a085de55 | 284 | * @param arg struct sswt_cb* used to signal a semaphore and end waiting. |
| pehrhovey | 0:a548a085de55 | 285 | */ |
| pehrhovey | 0:a548a085de55 | 286 | static void |
| pehrhovey | 0:a548a085de55 | 287 | sswt_handler(void *arg) |
| pehrhovey | 0:a548a085de55 | 288 | { |
| pehrhovey | 0:a548a085de55 | 289 | struct sswt_cb *sswt_cb = (struct sswt_cb *) arg; |
| pehrhovey | 0:a548a085de55 | 290 | |
| pehrhovey | 0:a548a085de55 | 291 | /* Timeout. Set flag to TRUE and signal semaphore */ |
| pehrhovey | 0:a548a085de55 | 292 | sswt_cb->timeflag = 1; |
| pehrhovey | 0:a548a085de55 | 293 | sys_sem_signal(*(sswt_cb->psem)); |
| pehrhovey | 0:a548a085de55 | 294 | } |
| pehrhovey | 0:a548a085de55 | 295 | |
| pehrhovey | 0:a548a085de55 | 296 | /** |
| pehrhovey | 0:a548a085de55 | 297 | * Wait for a semaphore with timeout (specified in ms) |
| pehrhovey | 0:a548a085de55 | 298 | * |
| pehrhovey | 0:a548a085de55 | 299 | * @param sem semaphore to wait |
| pehrhovey | 0:a548a085de55 | 300 | * @param timeout timeout in ms (0: wait forever) |
| pehrhovey | 0:a548a085de55 | 301 | * @return 0 on timeout, 1 otherwise |
| pehrhovey | 0:a548a085de55 | 302 | */ |
| pehrhovey | 0:a548a085de55 | 303 | int |
| pehrhovey | 0:a548a085de55 | 304 | sys_sem_wait_timeout(sys_sem_t sem, u32_t timeout) |
| pehrhovey | 0:a548a085de55 | 305 | { |
| pehrhovey | 0:a548a085de55 | 306 | struct sswt_cb sswt_cb; |
| pehrhovey | 0:a548a085de55 | 307 | |
| pehrhovey | 0:a548a085de55 | 308 | sswt_cb.psem = &sem; |
| pehrhovey | 0:a548a085de55 | 309 | sswt_cb.timeflag = 0; |
| pehrhovey | 0:a548a085de55 | 310 | |
| pehrhovey | 0:a548a085de55 | 311 | /* If timeout is zero, then just wait forever */ |
| pehrhovey | 0:a548a085de55 | 312 | if (timeout > 0) { |
| pehrhovey | 0:a548a085de55 | 313 | /* Create a timer and pass it the address of our flag */ |
| pehrhovey | 0:a548a085de55 | 314 | sys_timeout(timeout, sswt_handler, &sswt_cb); |
| pehrhovey | 0:a548a085de55 | 315 | } |
| pehrhovey | 0:a548a085de55 | 316 | sys_sem_wait(sem); |
| pehrhovey | 0:a548a085de55 | 317 | /* Was it a timeout? */ |
| pehrhovey | 0:a548a085de55 | 318 | if (sswt_cb.timeflag) { |
| pehrhovey | 0:a548a085de55 | 319 | /* timeout */ |
| pehrhovey | 0:a548a085de55 | 320 | return 0; |
| pehrhovey | 0:a548a085de55 | 321 | } else { |
| pehrhovey | 0:a548a085de55 | 322 | /* Not a timeout. Remove timeout entry */ |
| pehrhovey | 0:a548a085de55 | 323 | sys_untimeout(sswt_handler, &sswt_cb); |
| pehrhovey | 0:a548a085de55 | 324 | return 1; |
| pehrhovey | 0:a548a085de55 | 325 | } |
| pehrhovey | 0:a548a085de55 | 326 | } |
| pehrhovey | 0:a548a085de55 | 327 | |
| pehrhovey | 0:a548a085de55 | 328 | /** |
| pehrhovey | 0:a548a085de55 | 329 | * Sleep for some ms. Timeouts are processed while sleeping. |
| pehrhovey | 0:a548a085de55 | 330 | * |
| pehrhovey | 0:a548a085de55 | 331 | * @param ms number of milliseconds to sleep |
| pehrhovey | 0:a548a085de55 | 332 | */ |
| pehrhovey | 0:a548a085de55 | 333 | void |
| pehrhovey | 0:a548a085de55 | 334 | sys_msleep(u32_t ms) |
| pehrhovey | 0:a548a085de55 | 335 | { |
| pehrhovey | 0:a548a085de55 | 336 | sys_sem_t delaysem = sys_sem_new(0); |
| pehrhovey | 0:a548a085de55 | 337 | |
| pehrhovey | 0:a548a085de55 | 338 | sys_sem_wait_timeout(delaysem, ms); |
| pehrhovey | 0:a548a085de55 | 339 | |
| pehrhovey | 0:a548a085de55 | 340 | sys_sem_free(delaysem); |
| pehrhovey | 0:a548a085de55 | 341 | } |
| pehrhovey | 0:a548a085de55 | 342 | |
| pehrhovey | 0:a548a085de55 | 343 | |
| pehrhovey | 0:a548a085de55 | 344 | #endif /* NO_SYS */ |