relibc_pthreads-emb/pte_new.c

/*
 * pte_new.c
 *
 * Description:
 * This translation unit implements miscellaneous thread functions.
 *
 * --------------------------------------------------------------------------
 *
 *      Pthreads-embedded (PTE) - POSIX Threads Library for embedded systems
 *      Copyright(C) 2008 Jason Schmidlapp
 *
 *      Contact Email: jschmidlapp@users.sourceforge.net
 *
 *
 *      Based upon Pthreads-win32 - POSIX Threads Library for Win32
 *      Copyright(C) 1998 John E. Bossom
 *      Copyright(C) 1999,2005 Pthreads-win32 contributors
 *
 *      Contact Email: rpj@callisto.canberra.edu.au
 *
 *      The original list of contributors to the Pthreads-win32 project
 *      is contained in the file CONTRIBUTORS.ptw32 included with the
 *      source code distribution. The list can also be seen at the
 *      following World Wide Web location:
 *      http://sources.redhat.com/pthreads-win32/contributors.html
 *
 *      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 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 in the file COPYING.LIB;
 *      if not, write to the Free Software Foundation, Inc.,
 *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#include <stdio.h>
#include <stdlib.h>


#include "pthread.h"
#include "implement.h"


pthread_t
pte_new (void)
{
  pthread_t t;
  pthread_t nil = {NULL, 0};
  pte_thread_t * tp;

  /*
   * If there's a reusable pthread_t then use it.
   */
  t = pte_threadReusePop ();

  if (NULL != t.p)
    {
      tp = (pte_thread_t *) t.p;
    }
  else
    {
      /* No reuse threads available */
      tp = (pte_thread_t *) calloc (1, sizeof(pte_thread_t));

      if (tp == NULL)
        {
          return nil;
        }

      /* ptHandle.p needs to point to it's parent pte_thread_t. */
      t.p = tp->ptHandle.p = tp;
      t.x = tp->ptHandle.x = 0;
    }

  /* Set default state. */
  tp->sched_priority = pte_osThreadGetMinPriority();

  tp->detachState = PTHREAD_CREATE_JOINABLE;
  tp->cancelState = PTHREAD_CANCEL_ENABLE;
  tp->cancelType = PTHREAD_CANCEL_DEFERRED;
  tp->cancelLock = PTHREAD_MUTEX_INITIALIZER;
  tp->threadLock = PTHREAD_MUTEX_INITIALIZER;

  return t;

}