mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/* 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 */
|