/* Definitions for thread-local data handling.  NPTL/sparc version.   Copyright (C) 2003, 2005, 2006, 2007 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 _TLS_H#define _TLS_H#include <dl-sysdep.h>#ifndef __ASSEMBLER__# include <stdbool.h># include <stddef.h># include <stdint.h># include <stdlib.h># include <list.h># include <kernel-features.h>/* Type for the dtv.  */typedef union dtv{  size_t counter;  struct  {    void *val;    bool is_static;  } pointer;} dtv_t;typedef struct{  void *tcb;		/* Pointer to the TCB.  Not necessary the			   thread descriptor used by libpthread.  */  dtv_t *dtv;  void *self;  int multiple_threads;#if __WORDSIZE == 64  int gscope_flag;#endif  uintptr_t sysinfo;  uintptr_t stack_guard;  uintptr_t pointer_guard;#if __WORDSIZE != 64  int gscope_flag;#endif#ifndef __ASSUME_PRIVATE_FUTEX  int private_futex;#endif} tcbhead_t;#else /* __ASSEMBLER__ */# include <tcb-offsets.h>#endif /* __ASSEMBLER__ *//* We require TLS support in the tools.  */#ifndef HAVE_TLS_SUPPORT# error "TLS support is required."#endif#ifndef __ASSEMBLER__/* Get system call information.  */# include <sysdep.h>/* Get the thread descriptor definition.  */# include <nptl/descr.h>register struct pthread *__thread_self __asm__("%g7");/* This is the size of the initial TCB.  Can't be just sizeof (tcbhead_t),   because NPTL getpid, __libc_alloca_cutoff etc. need (almost) the whole   struct pthread even when not linked with -lpthread.  */# define TLS_INIT_TCB_SIZE sizeof (struct pthread)/* Alignment requirements for the initial TCB.  */# define TLS_INIT_TCB_ALIGN __alignof__ (struct pthread)/* This is the size of the TCB.  */# define TLS_TCB_SIZE sizeof (struct pthread)/* Alignment requirements for the TCB.  */# define TLS_TCB_ALIGN __alignof__ (struct pthread)/* The TCB can have any size and the memory following the address the   thread pointer points to is unspecified.  Allocate the TCB there.  */# define TLS_TCB_AT_TP	1/* Install the dtv pointer.  The pointer passed is to the element with   index -1 which contain the length.  */# define INSTALL_DTV(descr, dtvp) \  ((tcbhead_t *) (descr))->dtv = (dtvp) + 1/* Install new dtv for current thread.  */# define INSTALL_NEW_DTV(DTV) \  (((tcbhead_t *) __thread_self)->dtv = (DTV))/* Return dtv of given thread descriptor.  */# define GET_DTV(descr) \  (((tcbhead_t *) (descr))->dtv)/* Code to initially initialize the thread pointer.  */# define TLS_INIT_TP(descr, secondcall) \  (__thread_self = (__typeof (__thread_self)) (descr), NULL)/* Return the address of the dtv for the current thread.  */# define THREAD_DTV() \  (((tcbhead_t *) __thread_self)->dtv)/* Return the thread descriptor for the current thread.  */#define THREAD_SELF  __thread_self/* Magic for libthread_db to know how to do THREAD_SELF.  */# define DB_THREAD_SELF_INCLUDE <sys/ucontext.h># define DB_THREAD_SELF \  REGISTER (32, 32, REG_G7 * 4, 0) REGISTER (64, 64, REG_G7 * 8, 0)/* Access to data in the thread descriptor is easy.  */#define THREAD_GETMEM(descr, member) \  descr->member#define THREAD_GETMEM_NC(descr, member, idx) \  descr->member[idx]#define THREAD_SETMEM(descr, member, value) \  descr->member = (value)#define THREAD_SETMEM_NC(descr, member, idx, value) \  descr->member[idx] = (value)/* Set the stack guard field in TCB head.  */#define THREAD_SET_STACK_GUARD(value) \  THREAD_SETMEM (THREAD_SELF, header.stack_guard, value)# define THREAD_COPY_STACK_GUARD(descr) \  ((descr)->header.stack_guard \   = THREAD_GETMEM (THREAD_SELF, header.stack_guard))/* Get/set the stack guard field in TCB head.  */#define THREAD_GET_POINTER_GUARD() \  THREAD_GETMEM (THREAD_SELF, header.pointer_guard)#define THREAD_SET_POINTER_GUARD(value) \  THREAD_SETMEM (THREAD_SELF, header.pointer_guard, value)# define THREAD_COPY_POINTER_GUARD(descr) \  ((descr)->header.pointer_guard = THREAD_GET_POINTER_GUARD ())/* Get and set the global scope generation counter in struct pthread.  */#define THREAD_GSCOPE_FLAG_UNUSED 0#define THREAD_GSCOPE_FLAG_USED   1#define THREAD_GSCOPE_FLAG_WAIT   2#define THREAD_GSCOPE_RESET_FLAG() \  do									     \    { int __res								     \	= atomic_exchange_rel (&THREAD_SELF->header.gscope_flag,	     \			       THREAD_GSCOPE_FLAG_UNUSED);		     \      if (__res == THREAD_GSCOPE_FLAG_WAIT)				     \	lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE);   \    }									     \  while (0)#define THREAD_GSCOPE_SET_FLAG() \  do									     \    {									     \      THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED;	     \      atomic_write_barrier ();						     \    }									     \  while (0)#define THREAD_GSCOPE_WAIT() \  GL(dl_wait_lookup_done) ()#endif /* !ASSEMBLER */#endif	/* tls.h */