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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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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 */
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