mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 01:40:07 +00:00
ae9ecd08db
2003-02-07 Jim Meyering <jim@meyering.net> * io/ftw.c: Add autoconf-recommended block of alloca-related code. Include autoconf-recommended block of dirent/NAMELEN-related definitions and includes. Use NAMELEN throughout, rather than _D_EXACT_NAMLEN. [_LIBC]: Define NAMELEN to _D_EXACT_NAMLEN. [!_LIBC] (__getcwd): Define to xgetcwd and declare xgetcwd. (stpcpy): Declare, if necessary. (mempcpy): Define, if necessary. [!_LIBC] (__stpcpy, __mempcpy): Define. [!_LIBC] (LXSTAT, XSTAT): Define. (lstat) [!LIBC && !LSTAT_FOLLOWS_SLASHED_SYMLINK]: Define to rpl_lstat. (find_object): Don't use c99-style struct initializer. Tweak wording in a couple comments.
147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/* Definition for thread-local data handling. linuxthreads/SH version.
|
|
Copyright (C) 2002, 2003 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>
|
|
# include <pt-machine.h>
|
|
|
|
#ifndef __ASSEMBLER__
|
|
# include <stddef.h>
|
|
# include <stdint.h>
|
|
|
|
/* Type for the dtv. */
|
|
typedef union dtv
|
|
{
|
|
size_t counter;
|
|
void *pointer;
|
|
} dtv_t;
|
|
|
|
#else /* __ASSEMBLER__ */
|
|
# include <tcb-offsets.h>
|
|
#endif /* __ASSEMBLER__ */
|
|
|
|
|
|
/* We can support TLS only if the floating-stack support is available. */
|
|
#if defined HAVE_TLS_SUPPORT \
|
|
&& (defined FLOATING_STACKS || !defined IS_IN_libpthread)
|
|
|
|
/* Signal that TLS support is available. */
|
|
# define USE_TLS 1
|
|
|
|
# ifndef __ASSEMBLER__
|
|
|
|
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 __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. */
|
|
# define TLS_PRE_TCB_SIZE sizeof (struct _pthread_descr_struct)
|
|
|
|
/* Alignment requirements for the TCB. */
|
|
# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct)
|
|
|
|
/* The TLS blocks start right after the TCB. */
|
|
# define TLS_DTV_AT_TP 1
|
|
|
|
/* 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) \
|
|
({ tcbhead_t *__tcbp; \
|
|
__asm __volatile ("stc gbr,%0" : "=r" (__tcbp)); \
|
|
__tcbp->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) \
|
|
({ __asm __volatile ("ldc %0,gbr" : : "r" (tcbp)); 0; })
|
|
|
|
/* Return the address of the dtv for the current thread. */
|
|
# define THREAD_DTV() \
|
|
({ tcbhead_t *__tcbp; \
|
|
__asm __volatile ("stc gbr,%0" : "=r" (__tcbp)); \
|
|
__tcbp->dtv;})
|
|
|
|
/* Return the thread descriptor for the current thread. */
|
|
# undef THREAD_SELF
|
|
# define THREAD_SELF \
|
|
({ struct _pthread_descr_struct *__self; \
|
|
__asm ("stc gbr,%0" : "=r" (__self)); \
|
|
__self - 1;})
|
|
|
|
# undef INIT_THREAD_SELF
|
|
# define INIT_THREAD_SELF(descr, nr) \
|
|
({ struct _pthread_descr_struct *__self = (void *) descr; \
|
|
__asm __volatile ("ldc %0,gbr" : : "r" (__self + 1)); \
|
|
0; })
|
|
|
|
/* Get the thread descriptor definition. This must be after the
|
|
the definition of THREAD_SELF for TLS. */
|
|
# include <linuxthreads/descr.h>
|
|
|
|
# endif /* __ASSEMBLER__ */
|
|
|
|
#else
|
|
|
|
# ifndef __ASSEMBLER__
|
|
|
|
typedef struct
|
|
{
|
|
void *tcb;
|
|
dtv_t *dtv;
|
|
void *self;
|
|
int multiple_threads;
|
|
} tcbhead_t;
|
|
|
|
/* Get the thread descriptor definition. */
|
|
# include <linuxthreads/descr.h>
|
|
|
|
# define NONTLS_INIT_TP \
|
|
do { \
|
|
static const tcbhead_t nontls_init_tp = { .multiple_threads = 0 }; \
|
|
__asm __volatile ("ldc %0,gbr" : : "r" (&nontls_init_tp)); \
|
|
} while (0)
|
|
|
|
# endif /* __ASSEMBLER__ */
|
|
|
|
#endif /* HAVE_TLS_SUPPORT && (FLOATING_STACKS || !IS_IN_libpthread) */
|
|
|
|
#endif /* tls.h */
|