/* Machine-dependent pthreads configuration and inline functions.   Sparc v9 version.   Copyright (C) 1997-2002, 2003 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){  int ret;  __asm__ __volatile__("ldstub %1,%0"	: "=r" (ret), "=m" (*spinlock) : "m" (*spinlock));  return ret;}/* Memory barrier; default is to do nothing */#define MEMORY_BARRIER() \     __asm__ __volatile__("membar #LoadLoad | #LoadStore | #StoreLoad | #StoreStore" : : : "memory")/* Read barrier.  */#define READ_MEMORY_BARRIER() \     __asm__ __volatile__("membar #LoadLoad | #LoadStore" : : : "memory")/* Write barrier.  */#define WRITE_MEMORY_BARRIER() \     __asm__ __volatile__("membar #StoreLoad | #StoreStore" : : : "memory")/* 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 + (2 * 128))register char *stack_pointer __asm__ ("%sp");/* Registers %g6 and %g7 are reserved by the ABI for "system use".  The   TLS ABI specifies %g7 as the thread pointer.  */struct _pthread_descr_struct;register struct _pthread_descr_struct *__thread_self __asm__ ("%g7");/* Return the thread descriptor for the current thread.  */#define THREAD_SELF  __thread_self/* Initialize the thread-unique value.  */#define INIT_THREAD_SELF(descr, nr)  (__thread_self = (descr))/* Compare-and-swap for semaphores. */#define HAS_COMPARE_AND_SWAPPT_EI int__compare_and_swap (long int *p, long int oldval, long int newval){  long int readval;  __asm__ __volatile__ ("casx	[%4], %2, %0"			: "=r"(readval), "=m"(*p)			: "r"(oldval), "m"(*p), "r"(p), "0"(newval));  MEMORY_BARRIER();  return readval == oldval;}/* Access to data in the thread descriptor is easy.  */#define THREAD_GETMEM(descr, member) \  ((void) sizeof (descr), THREAD_SELF->member)#define THREAD_GETMEM_NC(descr, member) \  ((void) sizeof (descr), THREAD_SELF->member)#define THREAD_SETMEM(descr, member, value) \  ((void) sizeof (descr), THREAD_SELF->member = (value))#define THREAD_SETMEM_NC(descr, member, value) \  ((void) sizeof (descr), THREAD_SELF->member = (value))/* 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#endif /* pt-machine.h */