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c2afe83352
[USE_TLS && HAVE___THREAD]: Just include the sysdeps/generic file, which does the right thing when __thread support is available. * descr.h (struct _pthread_descr_struct) [USE_TLS && HAVE___THREAD]: Omit `p_libc_specific', `p_errnop', `p_errno', `p_h_errnop', `p_h_errno', `p_resp', and `p_res' members. * pthread.c (__pthread_initialize_minimal) [USE_TLS && HAVE___THREAD]: Don't initialize `p_errnop' and `p_h_errnop' members. (__pthread_reset_main_thread): Likewise. (__pthread_initialize_manager): Likewise. * manager.c (__pthread_manager, pthread_handle_create): Likewise. * pthread.c (pthread_initialize) [USE_TLS && HAVE___THREAD]: Don't initialize `p_resp' member. (__pthread_reset_main_thread): Likewise. * manager.c (pthread_handle_create): Likewise. * specific.c (libc_internal_tsd_set, libc_internal_tsd_get): Conditionalize these on [!(USE_TLS && HAVE___THREAD)]. * errno.c [USE_TLS && HAVE___THREAD] (__h_errno_location, __res_state): Don't define these at all. * sysdeps/i386/tls.h (INSTALL_DTV): Add parens around arguments! (INSTALL_NEW_DTV, GET_DTV): Likewise. * sysdeps/sh/tls.h (INSTALL_DTV, INSTALL_NEW_DTV, GET_DTV): Likewise. * weaks.c: Don't include <errno.h> here. 2002-08-01 Roland McGrath <roland@redhat.com> * sysdeps/i386/tls.h (TLS_DO_MODIFY_LDT): New macro, broken out of TLS_INIT_TP. (TLS_DO_SET_THREAD_AREA): New macro, uses thread_set_area syscall. (TLS_SETUP_GS_SEGMENT): New macro, try one or the other or both. (TLS_INIT_TP): Use that.
62 lines
2.5 KiB
C
62 lines
2.5 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_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_TLS && HAVE___THREAD
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# define __libc_tsd_define(CLASS, KEY) CLASS __thread void *__libc_tsd_##KEY;
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#else
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# define __libc_tsd_define(CLASS, KEY) CLASS void *__libc_tsd_##KEY;
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#endif
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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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#endif /* bits/libc-tsd.h */
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