[Linux-vax-usr-commit] glibc/linuxthreads/sysdeps/vax pt-machine.h,NONE,1.1

[<ai...@us...>]

Update of /cvsroot/linux-vax/glibc/linuxthreads/sysdeps/vax
In directory sc8-pr-cvs1:/tmp/cvs-serv2890

Added Files:
	pt-machine.h 
Log Message:
DA: pt-machine.h lifted from my uclibc port


--- NEW FILE: pt-machine.h ---
/* Machine-dependent pthreads configuration and inline functions.
   VAX version.
   Copyright (C) 1996, 1998 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by David Airlie (airlied at linux.ie)

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

   The GNU C 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If
   not, write to the Free Software Foundation, Inc.,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifndef PT_EI
# define PT_EI extern inline
#endif


/* Spinlock implementation; required.  */
PT_EI int
testandset (int *spinlock)
{
  char ret;

  __asm__ __volatile__(
         "movl $1, %%r0\n\t"
	 "bbssi $0, (%1), 1f\n\t"
	 "clrl %%r0\n\t"
	 "1: movl %%r0, %0"
	 : "=r"(ret)
	 : "r"(spinlock)
	 : "r0");

  return ret;
}


/* Get some notion of the current stack.  Need not be exactly the top
   of the stack, just something somewhere in the current frame.  */
#define CURRENT_STACK_FRAME  stack_pointer
register char * stack_pointer __asm__ ("sp");