/*
  The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
  Copyright (C) 2001-2020 Aymeric MOIZARD amoizard@antisip.com

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include <osip2/internal.h>

#ifndef OSIP_MONOTHREAD

#include <osipparser2/osip_port.h>
#include <osip2/osip_mt.h>
#include <osip2/osip_condv.h>

#if !defined(__rtems__) && !defined(__VXWORKS_OS__) && !defined(__PSOS__) && !defined(WIN32) && !defined(_WIN32_WCE) && !defined(HAVE_PTHREAD_WIN32) && !defined(HAVE_PTHREAD) && !defined(HAVE_PTH_PTHREAD_H)
#error No thread implementation found!
#endif

#if defined(HAVE_PTHREAD) || defined(HAVE_PTH_PTHREAD_H) || defined(HAVE_PTHREAD_WIN32)
/*
  #include <sys/types.h>
  #include <sys/timeb.h>
*/
#include <pthread.h>

struct osip_cond *osip_cond_init() {
  osip_cond_t *cond = (osip_cond_t *) osip_malloc(sizeof(osip_cond_t));

  if (cond && (pthread_cond_init(&cond->cv, NULL) == 0)) {
    return (struct osip_cond *) (cond);
  }

  osip_free(cond);

  return NULL;
}

int osip_cond_destroy(struct osip_cond *_cond) {
  int ret;

  if (!_cond)
    return OSIP_BADPARAMETER;

  ret = pthread_cond_destroy(&_cond->cv);
  osip_free(_cond);
  return ret;
}

int osip_cond_signal(struct osip_cond *_cond) {
  if (!_cond)
    return OSIP_BADPARAMETER;

  return pthread_cond_signal(&_cond->cv);
}

int osip_cond_wait(struct osip_cond *_cond, struct osip_mutex *_mut) {
  if (!_cond)
    return OSIP_BADPARAMETER;

  return pthread_cond_wait(&_cond->cv, (pthread_mutex_t *) _mut);
}

int osip_cond_timedwait(struct osip_cond *_cond, struct osip_mutex *_mut, const struct timespec *abstime) {
  if (!_cond)
    return OSIP_BADPARAMETER;

  return pthread_cond_timedwait(&_cond->cv, (pthread_mutex_t *) _mut, (const struct timespec *) abstime);
}

#endif

#if defined(_WIN32_WCE)

#endif

#if defined(WIN32) && !defined(_WIN32_WCE) && !defined(HAVE_PTHREAD_WIN32)

#include <sys/types.h>
#include <sys/timeb.h>

struct osip_cond *osip_cond_init() {
  osip_cond_t *cond = (osip_cond_t *) osip_malloc(sizeof(osip_cond_t));

  if (cond && (cond->mut = osip_mutex_init()) != NULL) {
    cond->sem = osip_sem_init(0); /* initially locked */
    return (struct osip_cond *) (cond);
  }

  osip_free(cond);

  return NULL;
}

int osip_cond_destroy(struct osip_cond *_cond) {
  if (!_cond)
    return OSIP_SUCCESS;

  if (_cond->sem == NULL)
    return OSIP_SUCCESS;

  osip_sem_destroy(_cond->sem);

  if (_cond->mut == NULL)
    return OSIP_SUCCESS;

  osip_mutex_destroy(_cond->mut);
  osip_free(_cond);
  return (0);
}

int osip_cond_signal(struct osip_cond *_cond) {
  if (!_cond)
    return OSIP_BADPARAMETER;

  return osip_sem_post(_cond->sem);
}

int osip_cond_wait(struct osip_cond *_cond, struct osip_mutex *_mut) {
  int ret1 = 0, ret2 = 0, ret3 = 0;
  int i;

  if (!_cond)
    return OSIP_BADPARAMETER;

  i = osip_mutex_lock(_cond->mut);

  if (i != 0)
    return i;

  i = osip_mutex_unlock(_mut);

  if (i != 0)
    return i;

  ret1 = osip_sem_wait(_cond->sem);

  ret2 = osip_mutex_lock(_mut);

  ret3 = osip_mutex_unlock(_cond->mut);

  if (ret1)
    return ret1;

  if (ret2)
    return ret2;

  if (ret3)
    return ret3;

  return OSIP_SUCCESS;
}

#define OSIP_CLOCK_REALTIME 4002

int __osip_clock_gettime(unsigned int clock_id, struct timespec *tp) {
  struct _timeb time_val;

  if (clock_id != OSIP_CLOCK_REALTIME)
    return OSIP_BADPARAMETER;

  if (tp == NULL)
    return OSIP_BADPARAMETER;

  _ftime(&time_val);
  tp->tv_sec = (long) time_val.time;
  tp->tv_nsec = time_val.millitm * 1000000;
  return OSIP_SUCCESS;
}

static int _delta_time(const struct timespec *start, const struct timespec *end) {
  int difx;

  if (start == NULL || end == NULL)
    return OSIP_SUCCESS;

  difx = ((end->tv_sec - start->tv_sec) * 1000) + ((end->tv_nsec - start->tv_nsec) / 1000000);

  return difx;
}

int osip_cond_timedwait(struct osip_cond *_cond, struct osip_mutex *_mut, const struct timespec *abstime) {
  DWORD dwRet;
  struct timespec now;
  int timeout_ms;
  HANDLE sem;
  int i;

  if (!_cond)
    return OSIP_BADPARAMETER;

  sem = *((HANDLE *) _cond->sem);

  if (sem == NULL)
    return OSIP_UNDEFINED_ERROR;

  if (abstime == NULL)
    return OSIP_BADPARAMETER;

  __osip_clock_gettime(OSIP_CLOCK_REALTIME, &now);

  timeout_ms = _delta_time(&now, abstime);

  if (timeout_ms <= 0)
    return 1; /* ETIMEDOUT; */

  i = osip_mutex_unlock(_mut);

  if (i != 0)
    return i;

  dwRet = WaitForSingleObjectEx(sem, timeout_ms, FALSE);

  i = osip_mutex_lock(_mut);

  if (i != 0)
    return i;

  switch (dwRet) {
  case WAIT_OBJECT_0:
    return OSIP_SUCCESS;
    break;

  case WAIT_TIMEOUT:
    return 1; /* ETIMEDOUT; */
    break;

  default:
    return OSIP_UNDEFINED_ERROR;
    break;
  }
}
#endif

#ifdef __PSOS__
/*TODO*/
#endif
/* use VxWorks implementation */
#ifdef __VXWORKS_OS__
struct osip_cond *osip_cond_init() {
  osip_cond_t *cond = (osip_cond_t *) osip_malloc(sizeof(osip_cond_t));

  if ((cond->sem = osip_sem_init(0)) != NULL) {
    return (struct osip_cond *) (cond);
  }

  osip_free(cond);

  return NULL;
}

int osip_cond_destroy(struct osip_cond *_cond) {
  if (_cond->sem == NULL)
    return OSIP_SUCCESS;

  osip_sem_destroy(_cond->sem);
  osip_free(_cond);
  return (0);
}

int osip_cond_signal(struct osip_cond *_cond) {
  return osip_sem_post(_cond->sem);
}

+ static int _cond_wait(struct osip_cond *_cond, struct osip_mutex *_mut, int ticks) {
  int ret;

  if (_cond == NULL)
    return OSIP_BADPARAMETER;

  ret = osip_mutex_unlock(_mut);

  if (ret != 0) {
    return ret;
  }

  ret = semTake(((osip_sem_t *) _cond->sem)->semId, ticks);

  if (ret != OK) {
    switch (errno) {
    case S_objLib_OBJ_ID_ERROR:

    /* fall through */
    case S_objLib_OBJ_UNAVAILABLE:
      /* fall through */
#if 0
    case S_intLib_NOT_ISR_CALLABLE:
#endif
      ret = OSIP_UNDEFINED_ERROR;
      break;

    case S_objLib_OBJ_TIMEOUT:
      ret = 1;
      break;

    default: /* vxworks has bugs */
      ret = 1;
      break;
    }
  }

  i = osip_mutex_lock(_mut);

  if (i != 0) {
    ret = i;
  }

  return ret;
}

int osip_cond_wait(struct osip_cond *_cond, struct osip_mutex *_mut) {
  return _cond_wait(_cond, _mut, WAIT_FOREVER);
}

int osip_cond_timedwait(struct osip_cond *_cond, struct osip_mutex *_mut, const struct timespec *abstime) {
  int rate = sysClkRateGet();
  struct timespec now;
  long sec, nsec;
  int ticks;
  SEM_ID sem;

  if (_cond == NULL)
    return OSIP_BADPARAMETER;

  sem = ((osip_sem_t *) _cond->sem)->semId;

  if (sem == NULL)
    return OSIP_UNDEFINED_ERROR;

  if (abstime == NULL)
    return OSIP_BADPARAMETER;

  clock_gettime(CLOCK_REALTIME, &now);

  sec = abstime->tv_sec - now.tv_sec;
  nsec = abstime->tv_nsec - now.tv_nsec;

  while ((sec > 0) && (nsec < 0)) {
    --sec;
    nsec += 1000000000;
  }

  if (nsec < 0)
    return 1; /*ETIMEDOUT; */

  ticks = (sec * rate) + (nsec / 1000 * rate / 1000000);

  return _cond_wait(_cond, _mut, ticks);
}

#endif

#endif /* #ifndef OSIP_MONOTHREAD */