locore_atexit.c

来自「这是leon3处理器的交叉编译链」· C语言 代码 · 共 50 行

/*

    LEON2/3 LIBIO low-level routines 
    Written by Jiri Gaisler.
    Copyright (C) 2004  Gaisler Research AB

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/
/*
 * locore_atexit.s for LEON
 */
 
#include <stddef.h>
#include <stdlib.h>
#include <reent.h>
#include <sys/lock.h>

/*
 * Register a function to be performed at exit or on shared library unload.
 */

int atexit(void (*fn) (void))
{
  register struct _atexit *p;

  p = _GLOBAL_REENT->_atexit;
  if (p == NULL)
    _GLOBAL_REENT->_atexit = p = &_GLOBAL_REENT->_atexit0;
  if (p->_ind >= _ATEXIT_SIZE)
    {
	  return -1;
    }

  p->_fns[p->_ind++] = fn;
  return 0;
}