/* Definition for thread-local data handling.  nptl/IA-64 version.   Copyright (C) 2003, 2004, 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	1#include <dl-sysdep.h>#ifndef __ASSEMBLER__# include <stdbool.h># include <stddef.h># include <stdint.h># include <stdlib.h># include <list.h>/* Type for the dtv.  */typedef union dtv{  size_t counter;  struct  {    void *val;    bool is_static;  } pointer;} dtv_t;typedef struct{  dtv_t *dtv;  void *__private;} tcbhead_t;register struct pthread *__thread_self __asm__("r13");# define TLS_MULTIPLE_THREADS_IN_TCB 1#else /* __ASSEMBLER__ */# include <tcb-offsets.h>#endif/* We require TLS support in the tools.  */#ifndef HAVE_TLS_SUPPORT# error "TLS support is required."#endif/* Alignment requirement for the stack.  */#define STACK_ALIGN	16#ifndef __ASSEMBLER__/* Get system call information.  */# include <sysdep.h>/* This is the size of the initial TCB.  */# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)/* Alignment requirements for the initial TCB.  */# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)/* This is the size of the TCB.  */# define TLS_TCB_SIZE sizeof (tcbhead_t)/* This is the size we need before TCB.   If there is not any room for uintptr_t stack_guard and   uintptr_t pointer_guard in struct pthread's final padding,   we need to put struct pthread 16 byte slower.  */# define TLS_PRE_TCB_SIZE \  (sizeof (struct pthread)						\   + (PTHREAD_STRUCT_END_PADDING < 2 * sizeof (uintptr_t)		\      ? ((2 * sizeof (uintptr_t) + __alignof__ (struct pthread) - 1)	\	 & ~(__alignof__ (struct pthread) - 1))				\      : 0))/* Alignment requirements for the TCB.  */# define TLS_TCB_ALIGN __alignof__ (struct pthread)/* The DTV is allocated at the TP; the TCB is placed elsewhere.  */# define TLS_DTV_AT_TP	1/* Get the thread descriptor definition.  */# include <nptl/descr.h>/* 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)#define THREAD_SELF_SYSINFO	(((tcbhead_t *) __thread_self)->__private)#define THREAD_SYSINFO(pd) \  (((tcbhead_t *) ((char *) (pd) + TLS_PRE_TCB_SIZE))->__private)#if defined NEED_DL_SYSINFO# define INIT_SYSINFO   THREAD_SELF_SYSINFO = (void *) GLRO(dl_sysinfo)#else# define INIT_SYSINFO   NULL#endif/* Code to initially initialize the thread pointer.  This might need   special attention since 'errno' is not yet available and if the   operation can cause a failure 'errno' must not be touched.  */# define TLS_INIT_TP(thrdescr, secondcall) \  (__thread_self = (thrdescr), INIT_SYSINFO, 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 \  ((struct pthread *) ((char *) __thread_self - TLS_PRE_TCB_SIZE))/* Magic for libthread_db to know how to do THREAD_SELF.  */# define DB_THREAD_SELF REGISTER (64, 64, 13 * 8, -TLS_PRE_TCB_SIZE)/* 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) \  (((uintptr_t *) __thread_self)[-1] = (value))#define THREAD_COPY_STACK_GUARD(descr) \  (((uintptr_t *) ((char *) (descr) + TLS_PRE_TCB_SIZE))[-1] \   = ((uintptr_t *) __thread_self)[-1])/* Set the pointer guard field in TCB head.  */#define THREAD_GET_POINTER_GUARD() \  (((uintptr_t *) __thread_self)[-2])#define THREAD_SET_POINTER_GUARD(value) \  (((uintptr_t *) __thread_self)[-2] = (value))#define THREAD_COPY_POINTER_GUARD(descr) \  (((uintptr_t *) ((char *) (descr) + TLS_PRE_TCB_SIZE))[-2] \   = 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 */