/* Machine-dependent pthreads configuration and inline functions.   x86-64 version.   Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.   This file is part of the GNU C Library.   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; 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 __ASSEMBLER__# include <stddef.h>	/* For offsetof.  */# include <stdlib.h>	/* For abort().  */# include <asm/prctl.h># ifndef PT_EI#  define PT_EI extern inline __attribute__ ((always_inline))# endifextern long int testandset (int *spinlock);extern int __compare_and_swap (long int *p, long int oldval, long int newval);/* 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__ ("%rsp") __attribute_used__;/* Spinlock implementation; required.  */PT_EI long inttestandset (int *spinlock){  long int ret;  __asm__ __volatile__ (	"xchgl %k0, %1"	: "=r"(ret), "=m"(*spinlock)	: "0"(1), "m"(*spinlock)	: "memory");  return ret;}/* Compare-and-swap for semaphores.  */# 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__ ("lock; cmpxchgq %3, %1; sete %0"			: "=q" (ret), "=m" (*p), "=a" (readval)			: "r" (newval), "m" (*p), "a" (oldval)			: "memory");  return ret;}#endif /* !__ASSEMBLER__ *//* We want the OS to assign stack addresses.  */#define FLOATING_STACKS	1/* Maximum size of the stack if the rlimit is unlimited.  */#define ARCH_STACK_MAX_SIZE	32*1024*1024/* The ia32e really want some help to prevent overheating.  */#define BUSY_WAIT_NOP	__asm__ ("rep; nop")#endif /* pt-machine.h */