mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 16:21:07 +00:00
52 lines
2.2 KiB
C
52 lines
2.2 KiB
C
|
/* libc-internal interface for thread-specific data. Stub version.
|
||
|
|
Copyright (C) 1998 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
|
||
|
|
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 */
|