/* Machine-dependent pthreads configuration and inline functions.   m68k version.   Copyright (C) 1996, 1998, 2000, 2002 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Richard Henderson <rth@tamu.edu>.   The GNU C 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 2.1 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   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser 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_MACHINE_H#define _PT_MACHINE_H   1#ifndef PT_EI# define PT_EI extern inline#endifextern long int testandset (int *spinlock);extern int __compare_and_swap (long int *p, long int oldval, long int newval);/* Spinlock implementation; required.  */PT_EI long inttestandset (int *spinlock){  char ret;  __asm__ __volatile__(#if !defined(__mcoldfire__) && !defined(__mcf5200__) && !defined(__m68000)         "tas %1; sne %0"#else         "bset #7,%1; sne %0"#endif       : "=dm"(ret), "=m"(*spinlock)       : "m"(*spinlock)       : "cc");  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_pointerregister char * stack_pointer __asm__ ("%sp");/* Compare-and-swap for semaphores. */#if !defined(__mcoldfire__) && !defined(__mcf5200__) && !defined(__mc68000)#define HAS_COMPARE_AND_SWAPPT_EI int__compare_and_swap (long int *p, long int oldval, long int newval){  char ret;  long int readval;  __asm__ __volatile__ ("casl %2, %3, %1; seq %0"			: "=dm" (ret), "=m" (*p), "=d" (readval)			: "d" (newval), "m" (*p), "2" (oldval));  return ret;}#endif#endif /* pt-machine.h */