mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 22:40:05 +00:00
144 lines
4.9 KiB
C
144 lines
4.9 KiB
C
/* Copyright (C) 2005-2017 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _TLS_H
|
|
# define _TLS_H 1
|
|
|
|
# include <dl-sysdep.h>
|
|
|
|
#ifndef __ASSEMBLER__
|
|
# include <stdbool.h>
|
|
# include <stddef.h>
|
|
# include <stdint.h>
|
|
# include <dl-dtv.h>
|
|
|
|
#else /* __ASSEMBLER__ */
|
|
# include <tcb-offsets.h>
|
|
#endif /* __ASSEMBLER__ */
|
|
|
|
#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
|
|
# define TLS_TCB_AT_TP 0
|
|
|
|
/* Get the thread descriptor definition. */
|
|
# include <nptl/descr.h>
|
|
|
|
typedef struct
|
|
{
|
|
dtv_t *dtv;
|
|
void *private;
|
|
} tcbhead_t;
|
|
|
|
#define READ_THREAD_POINTER() \
|
|
({ register void *__microblaze_thread_area asm ("r21"); \
|
|
__microblaze_thread_area; })
|
|
|
|
/* 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)
|
|
|
|
/* Alignment requirements for the TCB. */
|
|
# define TLS_TCB_ALIGN __alignof__ (struct pthread)
|
|
|
|
/* 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.
|
|
r21 is reserved for thread pointer. */
|
|
# define TLS_INIT_TP(tcbp) \
|
|
({ __asm __volatile ("or r21,r0,%0" : : "r" ((void *)tcbp)); NULL; })
|
|
|
|
# define TLS_DEFINE_INIT_TP(tp, pd) void *tp = (pd) + 1
|
|
|
|
/* Return the address of the dtv for the current thread. */
|
|
# define THREAD_DTV() \
|
|
(((tcbhead_t *) READ_THREAD_POINTER())->dtv)
|
|
|
|
/* Return the thread descriptor for the current thread. */
|
|
# define THREAD_SELF \
|
|
(((struct pthread *) READ_THREAD_POINTER()) - 1)
|
|
|
|
/* Magic for libthread_db to know how to do THREAD_SELF. */
|
|
# define DB_THREAD_SELF \
|
|
CONST_THREAD_AREA (32, sizeof (struct pthread))
|
|
|
|
/* Read member of the thread descriptor directly. */
|
|
# define THREAD_GETMEM(descr, member) (descr->member)
|
|
|
|
/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
|
|
# define THREAD_GETMEM_NC(descr, member, idx) \
|
|
(descr->member[idx])
|
|
|
|
/* Set member of the thread descriptor directly. */
|
|
# define THREAD_SETMEM(descr, member, value) \
|
|
(descr->member = (value))
|
|
|
|
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
|
|
# define THREAD_SETMEM_NC(descr, member, idx, value) \
|
|
(descr->member[idx] = (value))
|
|
|
|
/* 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. */
|