/*
    ChibiOS/RT - Copyright (C) 2006-2007 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>
*/

#include <ch.h>

#include "lwip/opt.h"
#include "lwip/mem.h"
#include "lwip/sys.h"

#include "arch/cc.h"
#include "arch/sys_arch.h"

static unsigned cnt;

void sys_init(void) {

  cnt = 0;
}

sys_sem_t sys_sem_new(u8_t count) {

  sys_sem_t sem = mem_malloc(sizeof(Semaphore));
  chSemInit(sem, (cnt_t)count);
  return sem;
}

void sys_sem_free(sys_sem_t sem) {

  mem_free(sem);
}

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;

  chSysLock();
  time = chTimeNow();
  chSemWaitTimeoutS(sem, (systime_t)timeout);
  time = chTimeNow() - time;
  chSysUnlock();
  return time;
}

sys_mbox_t sys_mbox_new(int size) {
  sys_mbox_t mbox;

  mbox = mem_malloc(sizeof(Mailbox) + sizeof(msg_t) * size);
  chMBInit(mbox, (void *)(mbox + 1), size);
  return mbox;
}

void sys_mbox_free(sys_mbox_t mbox) {

  mem_free(mbox);
}

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)
    return ERR_MEM;
  return ERR_OK;
}

u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **msg, u32_t timeout) {

  if (chMBFetchS(mbox, (msg_t *)msg, (systime_t)timeout) == RDY_TIMEOUT)
    return ERR_MEM;
  return ERR_OK;
}

u32_t sys_arch_mbox_tryfetch(sys_mbox_t mbox, void **msg) {

  if (chMBFetchS(mbox, (msg_t *)msg, TIME_IMMEDIATE) == RDY_TIMEOUT)
    return ERR_MEM;
  return ERR_OK;
}

struct sys_timeouts *sys_arch_timeouts(void) {

  return (struct sys_timeouts *)&currp->p_timeouts;
}

sys_thread_t sys_thread_new(char *name, void (* thread)(void *arg),
                            void *arg, int stacksize, int prio) {
  size_t wsz = THD_WA_SIZE(stacksize);
  void *wsp = mem_malloc(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) {

  chSysUnlock();
}