/**************************************************************************\
 *
 *  This file is part of the Coin 3D visualization library.
 *  Copyright (C) 1998-2007 by Systems in Motion.  All rights reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  ("GPL") version 2 as published by the Free Software Foundation.
 *  See the file LICENSE.GPL at the root directory of this source
 *  distribution for additional information about the GNU GPL.
 *
 *  For using Coin with software that can not be combined with the GNU
 *  GPL, and for taking advantage of the additional benefits of our
 *  support services, please contact Systems in Motion about acquiring
 *  a Coin Professional Edition License.
 *
 *  See http://www.coin3d.org/ for more information.
 *
 *  Systems in Motion, Postboks 1283, Pirsenteret, 7462 Trondheim, NORWAY.
 *  http://www.sim.no/  sales@sim.no  coin-support@coin3d.org
 *
\**************************************************************************/

/* This file should only be included from condvar.c */

#include <Inventor/C/threads/mutexp.h>
#include <Inventor/C/base/time.h>
#include <stdio.h>
static int
internal_condvar_struct_init(cc_condvar * condvar_struct)
{
  int status = pthread_cond_init(&(condvar_struct->pthread.condid), NULL);
  if (status != 0) {
    if (COIN_DEBUG)
      cc_debugerror_post("internal_condvar_struct_init",
			 "pthread_cond_init() error: %d\n", status);
    return CC_ERROR;
  }
  return CC_OK;
}

static int
internal_condvar_struct_clean(cc_condvar * condvar_struct)
{
  int status;
  int ret = CC_OK;
  status = pthread_cond_destroy(&(condvar_struct->pthread.condid));
  if (status != 0) {
    if (COIN_DEBUG)
      cc_debugerror_post("internal_condvar_struct_clean",
			 "pthread_cond_destroy() error: %d\n", status);
    ret = CC_ERROR;
  }
  return ret;
}

static int
internal_condvar_wait(cc_condvar * condvar, cc_mutex * mutex)
{
  int status;

  status = pthread_cond_wait(&condvar->pthread.condid,
                             &mutex->pthread.mutexid);
  if (status != 0) {
    if (COIN_DEBUG)
      cc_debugerror_post("internal_condvar_wait",
			 "pthread_cond_wait() error: %d\n", status);
    return CC_ERROR;
  }
  return CC_OK;
}

static int
internal_condvar_timed_wait(cc_condvar * condvar, cc_mutex * mutex, cc_time period)
{
  struct timespec timeout;
  cc_time when;
  int status, ret;
  double sec;

  when = cc_time_gettimeofday() + period;
  sec = floor(when);
  timeout.tv_sec = (int) sec;
#if defined(HAVE_PTHREAD_TIMESPEC_NSEC)
  timeout.tv_nsec = (int) ((when - sec) * 1000000000.0);
#else
  timeout.tv_usec = (int) ((when - sec) * 1000000.0);
#endif
  status = pthread_cond_timedwait(&condvar->pthread.condid,
                                  &mutex->pthread.mutexid, &timeout);
  ret = CC_OK;
  if (status != 0) {
    if (status == ETIMEDOUT) {
      ret = CC_TIMEOUT;
    }
    else {
      ret = CC_ERROR;
      if (COIN_DEBUG) {
        cc_debugerror_post("internal_condvar_timed_wait",
			   "pthread_cond_timedwait() error: %d", status);
        switch (status) {
        case EINTR: cc_debugerror_post("internal_condvar_timed_wait",
				       "EINTR\n"); break;
        case EBUSY: cc_debugerror_post("internal_condvar_timed_wait",
				       "EBUSY\n"); break;
        default: cc_debugerror_post("internal_condvar_timed_wait",
				    "default\n"); break;
        }
      }
    }
  }
  return ret;
}

static int
internal_condvar_wake_one(cc_condvar * condvar)
{
  int status;
  status = pthread_cond_signal(&condvar->pthread.condid);
  if (status != 0) {
    if (COIN_DEBUG)
      cc_debugerror_post("internal_condvar_wake_one",
			 "pthread_cond_signal() error: %d\n", status);
    return CC_ERROR;
  }
  return CC_OK;
}

static int
internal_condvar_wake_all(cc_condvar * condvar)
{
  int status = pthread_cond_broadcast(&condvar->pthread.condid);
  if (status != 0) {
    if (COIN_DEBUG)
      cc_debugerror_post("internal_condvar_wake_all",
			 "pthread_cond_broadcast() error: %d\n", status);
    return CC_ERROR;
  }
  return CC_OK;
}