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9b21e6bcf8
* include/libc-symbols.h (attribute_tls_model_ie): Define.
* include/errno.h (errno): Define to __libc_errno in libc.so.
Add attribute_tls_model_ie.
* include/netdb.h (h_errno): Define to __libc_h_errno in libc.so.
Add attribute_tls_model_ie.
* include/resolv.h (_res): Define to __libc_res in libc.so. Add
attribute_tls_model_ie.
* inet/herrno.c (__libc_h_errno): Add hidden alias to h_errno.
(h_errno): Define.
* resolv/res_libc.c (__libc_res): Add hidden alias to _res.
(_res): Define.
* sysdeps/generic/bits/libc-tsd.h (__libc_tsd_define): Add
attribute_tls_model_ie.
* sysdeps/generic/errno-loc.c (errno): Only undefine if not using
__thread.
* sysdeps/generic/errno.c (__libc_errno): Add hidden alias to errno.
* sysdeps/unix/sysv/linux/i386/sysdep.h (SYSCALL_ERROR_HANDLER): Use
__libc_errno in USE___THREAD case.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h (SYSCALL_ERROR_HANDLER):
Likewise.
* configure.in (HAVE_TLS_MODEL_ATTRIBUTE): Check for
__attribute__((tls_model (""))).
* configure: Rebuilt.
* config.h.in (HAVE_TLS_MODEL_ATTRIBUTE): Add.
70 lines
2.9 KiB
C
70 lines
2.9 KiB
C
/* libc-internal interface for thread-specific data. Stub or TLS version.
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Copyright (C) 1998,2001,02 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _GENERIC_BITS_LIBC_TSD_H
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#define _GENERIC_BITS_LIBC_TSD_H 1
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/* This file defines the following macros for accessing a small fixed
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set of thread-specific `void *' data used only internally by libc.
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__libc_tsd_define(CLASS, KEY) -- Define or declare a `void *' datum
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for KEY. CLASS can be `static' for
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keys used in only one source file,
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empty for global definitions, or
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`extern' for global declarations.
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__libc_tsd_address(KEY) -- Return the `void **' pointing to
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the current thread's datum for KEY.
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__libc_tsd_get(KEY) -- Return the `void *' datum for KEY.
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__libc_tsd_set(KEY, VALUE) -- Set the datum for KEY to VALUE.
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The set of available KEY's will usually be provided as an enum,
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and contains (at least):
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_LIBC_TSD_KEY_MALLOC
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_LIBC_TSD_KEY_DL_ERROR
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_LIBC_TSD_KEY_RPC_VARS
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All uses must be the literal _LIBC_TSD_* name in the __libc_tsd_* macros.
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Some implementations may not provide any enum at all and instead
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using string pasting in the macros. */
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#include <tls.h>
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/* When full support for __thread variables is available, this interface is
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just a trivial wrapper for it. Without TLS, this is the generic/stub
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implementation for wholly single-threaded systems.
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We don't define an enum for the possible key values, because the KEYs
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translate directly into variables by macro magic. */
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#if USE___THREAD
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# define __libc_tsd_define(CLASS, KEY) \
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CLASS __thread void *__libc_tsd_##KEY attribute_tls_model_ie;
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# define __libc_tsd_address(KEY) (&__libc_tsd_##KEY)
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# define __libc_tsd_get(KEY) (__libc_tsd_##KEY)
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# define __libc_tsd_set(KEY, VALUE) (__libc_tsd_##KEY = (VALUE))
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#else
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# define __libc_tsd_define(CLASS, KEY) CLASS void *__libc_tsd_##KEY##_data;
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# define __libc_tsd_address(KEY) (&__libc_tsd_##KEY##_data)
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# define __libc_tsd_get(KEY) (__libc_tsd_##KEY##_data)
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# define __libc_tsd_set(KEY, VALUE) (__libc_tsd_##KEY##_data = (VALUE))
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#endif
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#endif /* bits/libc-tsd.h */
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