/* Definition for thread-local data handling.  NPTL/Alpha version.   Copyright (C) 2003, 2005, 2006 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>/* Type for the dtv.  */typedef union dtv{  size_t counter;  struct  {    void *val;    bool is_static;  } pointer;} dtv_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>/* The TP points to the start of the thread blocks.  */# define TLS_DTV_AT_TP	1/* Get the thread descriptor definition.  */# include <nptl/descr.h>typedef struct{  dtv_t *dtv;  void *__private;} tcbhead_t;/* 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	16/* This is the size of the TCB.  */# define TLS_TCB_SIZE		sizeof (tcbhead_t)/* This is the size we need before TCB.  */# define TLS_PRE_TCB_SIZE	sizeof (struct pthread)/* Alignment requirements for the TCB.  */# define TLS_TCB_ALIGN		16/* Install the dtv pointer.  The pointer passed is to the element with   index -1 which contain the length.  */# define INSTALL_DTV(tcbp, dtvp) \  (((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1)/* Install new dtv for current thread.  */# define INSTALL_NEW_DTV(dtv) \  (THREAD_DTV() = (dtv))/* Return dtv of given thread descriptor.  */# define GET_DTV(tcbp) \  (((tcbhead_t *) (tcbp))->dtv)/* 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(tcbp, secondcall) \  (__builtin_set_thread_pointer ((void *)(tcbp)), NULL)/* Return the address of the dtv for the current thread.  */# define THREAD_DTV() \  (((tcbhead_t *) __builtin_thread_pointer ())->dtv)/* Return the thread descriptor for the current thread.  */# define THREAD_SELF \ ((struct pthread *)__builtin_thread_pointer () - 1)/* Magic for libthread_db to know how to do THREAD_SELF.  */# define DB_THREAD_SELF \  REGISTER (64, 64, 32 * 8, -sizeof (struct pthread))/* 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)#endif /* __ASSEMBLER__ */#endif	/* tls.h */