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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* **** This file incorporates work covered by the following copyright and ****
* **** permission notice: ****
*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
// see http://lwip.wikia.com/wiki/Porting_for_an_OS for instructions
#include "ch.h"
#include "lwip/opt.h"
#include "lwip/mem.h"
#include "lwip/sys.h"
#include "lwip/stats.h"
#include "arch/cc.h"
#include "arch/sys_arch.h"
void sys_init(void) {
}
err_t sys_sem_new(sys_sem_t *sem, u8_t count) {
*sem = chHeapAlloc(NULL, sizeof(Semaphore));
if (*sem == 0) {
SYS_STATS_INC(sem.err);
return ERR_MEM;
}
else {
chSemInit(*sem, (cnt_t)count);
SYS_STATS_INC(sem.used);
return ERR_OK;
}
}
void sys_sem_free(sys_sem_t *sem) {
chHeapFree(*sem);
*sem = SYS_SEM_NULL;
SYS_STATS_DEC(sem.used);
}
void sys_sem_signal(sys_sem_t *sem) {
chSemSignal(*sem);
}
u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout) {
systime_t time, tmo;
chSysLock();
tmo = timeout > 0 ? (systime_t)timeout : TIME_INFINITE;
time = chTimeNow();
if (chSemWaitTimeoutS(*sem, tmo) != RDY_OK)
time = SYS_ARCH_TIMEOUT;
else
time = chTimeNow() - time;
chSysUnlock();
return time;
}
int sys_sem_valid(sys_sem_t *sem) {
return *sem != SYS_SEM_NULL;
}
// typically called within lwIP after freeing a semaphore
// to make sure the pointer is not left pointing to invalid data
void sys_sem_set_invalid(sys_sem_t *sem) {
*sem = SYS_SEM_NULL;
}
err_t sys_mbox_new(sys_mbox_t *mbox, int size) {
*mbox = chHeapAlloc(NULL, sizeof(Mailbox) + sizeof(msg_t) * size);
if (*mbox == 0) {
SYS_STATS_INC(mbox.err);
return ERR_MEM;
}
else {
chMBInit(*mbox, (void *)(((uint8_t *)*mbox) + sizeof(Mailbox)), size);
SYS_STATS_INC(mbox.used);
return ERR_OK;
}
}
void sys_mbox_free(sys_mbox_t *mbox) {
if (chMBGetUsedCountI(*mbox) != 0) {
// If there are messages still present in the mailbox when the mailbox
// is deallocated, it is an indication of a programming error in lwIP
// and the developer should be notified.
SYS_STATS_INC(mbox.err);
chMBReset(*mbox);
}
chHeapFree(*mbox);
*mbox = SYS_MBOX_NULL;
SYS_STATS_DEC(mbox.used);
}
void sys_mbox_post(sys_mbox_t *mbox, void *msg) {
chMBPost(*mbox, (msg_t)msg, TIME_INFINITE);
}
err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg) {
if (chMBPost(*mbox, (msg_t)msg, TIME_IMMEDIATE) == RDY_TIMEOUT) {
SYS_STATS_INC(mbox.err);
return ERR_MEM;
}
return ERR_OK;
}
u32_t sys_arch_mbox_fetch(sys_mbox_t *mbox, void **msg, u32_t timeout) {
systime_t time, tmo;
chSysLock();
tmo = timeout > 0 ? (systime_t)timeout : TIME_INFINITE;
time = chTimeNow();
if (chMBFetchS(*mbox, (msg_t *)msg, tmo) != RDY_OK)
time = SYS_ARCH_TIMEOUT;
else
time = chTimeNow() - time;
chSysUnlock();
return time;
}
u32_t sys_arch_mbox_tryfetch(sys_mbox_t *mbox, void **msg) {
if (chMBFetch(*mbox, (msg_t *)msg, TIME_IMMEDIATE) == RDY_TIMEOUT)
return SYS_MBOX_EMPTY;
return 0;
}
int sys_mbox_valid(sys_mbox_t *mbox) {
return *mbox != SYS_MBOX_NULL;
}
// typically called within lwIP after freeing an mbox
// to make sure the pointer is not left pointing to invalid data
void sys_mbox_set_invalid(sys_mbox_t *mbox) {
*mbox = SYS_MBOX_NULL;
}
sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread,
void *arg, int stacksize, int prio) {
(void)name;
size_t wsz = THD_WA_SIZE(stacksize);
void *wsp = chCoreAlloc(wsz);
if (wsp == NULL)
return NULL;
return (sys_thread_t)chThdCreateStatic(wsp, wsz, prio, (tfunc_t)thread, arg);
}
sys_prot_t sys_arch_protect(void) {
chSysLock();
return 0;
}
void sys_arch_unprotect(sys_prot_t pval) {
(void)pval;
chSysUnlock();
}
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