diff options
Diffstat (limited to 'bits')
| -rw-r--r-- | bits/libc-tsd.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/bits/libc-tsd.h b/bits/libc-tsd.h new file mode 100644 index 0000000000..6048d995c8 --- /dev/null +++ b/bits/libc-tsd.h @@ -0,0 +1,51 @@ +/* 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 */ |