pthread_getaffinity_np.c

/*
 * pthread_getaffinity_np.c
 *
 * Description:
 * This translation unit implements non-portable 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 "pthread.h"
#include "implement.h"

int
pthread_getaffinity_np(pthread_t thread, size_t cpusetsize, cpu_set_t *cpuset)
{
    int result;
    (void)cpusetsize; // unused

    pte_thread_t* tp = (pte_thread_t*)thread;
    if (tp == NULL) {
        return EFAULT;
    }

    int affinity;

    result = pthread_mutex_lock (&tp->threadLock);

    if (0 == result)
    {
        affinity = pte_osThreadGetAffinity(tp->threadId);
        if (affinity < 0)
        {
            result = EINVAL;
        }
        else
        {
            *cpuset = affinity;
        }

        (void) pthread_mutex_unlock (&tp->threadLock);
    }
    return result;

}