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/* libc-internal interface for thread-specific data.  Stub version.

   Copyright (C) 1998, 2001 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 _BITS_LIBC_TSD_H

#define _BITS_LIBC_TSD_H 1

/* This file defines the following macros for accessing a small fixed

   set of thread-specific `void *' data used only internally by libc.

   __libc_tsd_define(CLASS, KEY)        -- Define or declare a `void *' datum

                                           for KEY.  CLASS can be `static' for

                                           keys used in only one source file,

                                           empty for global definitions, or

                                           `extern' for global declarations.

   __libc_tsd_get(KEY)                  -- Return the `void *' datum for KEY.

   __libc_tsd_set(KEY, VALUE)           -- Set the datum for KEY to VALUE.

   The set of available KEY's will usually be provided as an enum,

   and contains (at least):

                _LIBC_TSD_KEY_MALLOC

                _LIBC_TSD_KEY_DL_ERROR

                _LIBC_TSD_KEY_RPC_VARS

   All uses must be the literal _LIBC_TSD_* name in the __libc_tsd_* macros.

   Some implementations may not provide any enum at all and instead

   using string pasting in the macros.  */

/* This is the generic/stub implementation for wholly single-threaded

   systems.  We don't define an enum for the possible key values, because

   the KEYs translate directly into variables by macro magic.  */

#define __libc_tsd_define(CLASS, KEY)   CLASS void *__libc_tsd_##KEY##_data;

#define __libc_tsd_get(KEY)             (__libc_tsd_##KEY##_data)

#define __libc_tsd_set(KEY, VALUE)      (__libc_tsd_##KEY##_data = (VALUE))

#endif  /* bits/libc-tsd.h */