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Coin / src / threads / condvar_pthread.icc

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/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * 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.
 * 
 * Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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\**************************************************************************/

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

#include <stdio.h>

#include <Inventor/C/base/time.h>

#include "threads/mutexp.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;
}