linuxthreads/sysdeps/pthread/bits/libc-tsd.h

   1 /* libc-internal interface for thread-specific data.  LinuxThreads version.
   2    Copyright (C) 1997-2002, 2003 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 License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    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; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef _BITS_LIBC_TSD_H
  21 #define _BITS_LIBC_TSD_H 1
  22
  23 #include <linuxthreads/descr.h>
  24 #include <tls.h>
  25
  26 #if USE_TLS && HAVE___THREAD
  27
  28 /* When __thread works, the generic definition is what we want.  */
  29 # include <sysdeps/generic/bits/libc-tsd.h>
  30
  31 #else
  32
  33 # include <bits/libc-lock.h>
  34
  35 # ifndef SHARED
  36 extern void ** __pthread_internal_tsd_address (int);
  37 extern void *__pthread_internal_tsd_get (int);
  38 extern int __pthread_internal_tsd_set (int, const void *);
  39
  40 weak_extern (__pthread_internal_tsd_address)
  41 weak_extern (__pthread_internal_tsd_get)
  42 weak_extern (__pthread_internal_tsd_set)
  43 # endif
  44
  45 #define __libc_tsd_define(CLASS, KEY)   CLASS void *__libc_tsd_##KEY##_data;
  46 #define __libc_tsd_address(KEY) \
  47   __libc_maybe_call2 (pthread_internal_tsd_address,                     \
  48                       (_LIBC_TSD_KEY_##KEY), &__libc_tsd_##KEY##_data)
  49 #define __libc_tsd_get(KEY) \
  50   __libc_maybe_call2 (pthread_internal_tsd_get,                         \
  51                       (_LIBC_TSD_KEY_##KEY), __libc_tsd_##KEY##_data)
  52 #define __libc_tsd_set(KEY, VALUE) \
  53   __libc_maybe_call2 (pthread_internal_tsd_set,                         \
  54                       (_LIBC_TSD_KEY_##KEY, (VALUE)),                   \
  55                        (__libc_tsd_##KEY##_data = (VALUE), 0))
  56
  57 #endif
  58
  59 #endif  /* bits/libc-tsd.h */