pthread_getname_np.c

/*
 * pthread_getname_np.c
 *
 * --------------------------------------------------------------------------
 *
 *      pthreads-win32 - POSIX Threads Library for Win32
 *      Copyright(C) 1998 John E. Bossom
 *      Copyright(C) 1999-2021 pthreads-win32 / pthreads4w contributors
 *
 *      Homepage1: http://sourceware.org/pthreads-win32/
 *      Homepage2: http://sourceforge.net/projects/pthreads4w/
 *
 *      The current list of contributors is contained
 *      in the file CONTRIBUTORS 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
 *
 * --------------------------------------------------------------------------
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

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

int
pthread_getname_np(pthread_t thr, char *name, int len)
{
  ptw32_mcs_local_node_t threadLock;
  ptw32_thread_t * tp;
  char * s, * d;
  int result;

  /*
   * Validate the thread id. This method works for pthreads-win32 because
   * pthread_kill and pthread_t are designed to accommodate it, but the
   * method is not portable.
   */
  result = pthread_kill (thr, 0);
  if (0 != result)
    {
      return result;
    }

  tp = (ptw32_thread_t *) thr.p;

  ptw32_mcs_lock_acquire (&tp->threadLock, &threadLock);

  for (s = tp->name, d = name; *s && d < &name[len - 1]; *d++ = *s++)
    {}

  *d = '\0';
  ptw32_mcs_lock_release (&threadLock);

  return result;
}