/*

  silcunixmutex.c

  Author: Pekka Riikonen <priikone@silcnet.org>

  Copyright (C) 2001 Pekka Riikonen

  This program 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 2 of the License, or
  (at your option) any later version.
  
  This program 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.

*/
/* $Id$ */

#include "silcincludes.h"

/* SILC Mutex structure */
struct SilcMutexStruct {
#ifdef SILC_THREADS
  pthread_mutex_t mutex;
  unsigned int locked : 1;
#else
  void *tmp;
#endif /* SILC_THREADS */
};

bool silc_mutex_alloc(SilcMutex *mutex)
{
#ifdef SILC_THREADS
  *mutex = silc_calloc(1, sizeof(**mutex));
  if (*mutex == NULL)
    return FALSE;
  pthread_mutex_init(&(*mutex)->mutex, NULL);
#endif /* SILC_THREADS */
  return TRUE;
}

void silc_mutex_free(SilcMutex mutex)
{
#ifdef SILC_THREADS
  pthread_mutex_destroy(&mutex->mutex);
  silc_free(mutex);
#endif /* SILC_THREADS */
}

void silc_mutex_lock(SilcMutex mutex)
{
#ifdef SILC_THREADS
  if (pthread_mutex_lock(&mutex->mutex))
    assert(FALSE);
  assert(mutex->locked == 0);
  mutex->locked = 1;
#endif /* SILC_THREADS */
}

void silc_mutex_unlock(SilcMutex mutex)
{
#ifdef SILC_THREADS
  assert(mutex->locked == 1);
  mutex->locked = 0;
  if (pthread_mutex_unlock(&mutex->mutex))
    assert(FALSE);
#endif /* SILC_THREADS */
}