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/* Definitions for thread-local data handling. Hurd version.
Copyright (C) 2003-2020 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
<https://www.gnu.org/licenses/>. */
#ifndef _TLS_H
#define _TLS_H
#ifndef __ASSEMBLER__
# include <stddef.h>
# include <stdint.h>
# include <stdbool.h>
# include <sysdep.h>
# include <mach/mig_errors.h>
# include <mach.h>
# include <atomic.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 TLS_INIT_TCB_SIZE /* XXX */
/* Alignment requirements for the TCB. */
# define TLS_TCB_ALIGN TLS_INIT_TCB_ALIGN /* XXX */
/* 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
/* Return dtv of given thread descriptor. */
# define GET_DTV(descr) \
(((tcbhead_t *) (descr))->dtv)
/* Global scope switch support. */
#define THREAD_GSCOPE_IN_TCB 0
#define THREAD_GSCOPE_GLOBAL
#define THREAD_GSCOPE_SET_FLAG() \
atomic_exchange_and_add_acq (&GL(dl_thread_gscope_count), 1)
#define THREAD_GSCOPE_RESET_FLAG() \
do \
if (atomic_exchange_and_add_rel (&GL(dl_thread_gscope_count), -1) == 1) \
lll_wake (GL(dl_thread_gscope_count), 0); \
while (0)
#define THREAD_GSCOPE_WAIT() \
do \
{ \
int count; \
atomic_write_barrier (); \
while ((count = GL(dl_thread_gscope_count))) \
lll_wait (GL(dl_thread_gscope_count), count, 0); \
} \
while (0)
#endif /* !ASSEMBLER */
#endif /* tls.h */
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