sysdeps/mach/hurd/tls.h

   1 /* Definitions for thread-local data handling.  Hurd version.
   2    Copyright (C) 2003-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _TLS_H
  20 #define _TLS_H
  21
  22 #ifndef __ASSEMBLER__
  23
  24 # include <stddef.h>
  25 # include <stdint.h>
  26 # include <stdbool.h>
  27 # include <sysdep.h>
  28 # include <mach/mig_errors.h>
  29 # include <mach.h>
  30 # include <atomic.h>
  31
  32
  33 /* This is the size of the initial TCB.  */
  34 # define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
  35
  36 /* Alignment requirements for the initial TCB.  */
  37 # define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
  38
  39 /* This is the size of the TCB.  */
  40 # define TLS_TCB_SIZE TLS_INIT_TCB_SIZE /* XXX */
  41
  42 /* Alignment requirements for the TCB.  */
  43 # define TLS_TCB_ALIGN TLS_INIT_TCB_ALIGN /* XXX */
  44
  45
  46 /* Install the dtv pointer.  The pointer passed is to the element with
  47    index -1 which contain the length.  */
  48 # define INSTALL_DTV(descr, dtvp) \
  49   ((tcbhead_t *) (descr))->dtv = (dtvp) + 1
  50
  51 /* Return dtv of given thread descriptor.  */
  52 # define GET_DTV(descr) \
  53   (((tcbhead_t *) (descr))->dtv)
  54
  55 #endif /* !ASSEMBLER */
  56
  57
  58 #endif /* tls.h */