libc-tsd.h

linux下的glibc库的内核头文件

/* libc-internal interface for thread-specific data.  LinuxThreads version.
   Copyright (C) 1997-2002, 2003 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 Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser 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

#include <linuxthreads/descr.h>
#include <tls.h>

#if USE_TLS && HAVE___THREAD

/* When __thread works, the generic definition is what we want.  */
# include <sysdeps/generic/bits/libc-tsd.h>

#else

# include <bits/libc-lock.h>

# ifndef SHARED
extern void ** __pthread_internal_tsd_address (int);
extern void *__pthread_internal_tsd_get (int);
extern int __pthread_internal_tsd_set (int, const void *);

weak_extern (__pthread_internal_tsd_address)
weak_extern (__pthread_internal_tsd_get)
weak_extern (__pthread_internal_tsd_set)
# endif

#define __libc_tsd_define(CLASS, KEY)	CLASS void *__libc_tsd_##KEY##_data;
#define __libc_tsd_address(KEY) \
  __libc_maybe_call2 (pthread_internal_tsd_address,			\
		      (_LIBC_TSD_KEY_##KEY), &__libc_tsd_##KEY##_data)
#define __libc_tsd_get(KEY) \
  __libc_maybe_call2 (pthread_internal_tsd_get,				\
		      (_LIBC_TSD_KEY_##KEY), __libc_tsd_##KEY##_data)
#define __libc_tsd_set(KEY, VALUE) \
  __libc_maybe_call2 (pthread_internal_tsd_set,				\
		      (_LIBC_TSD_KEY_##KEY, (VALUE)),			\
		       (__libc_tsd_##KEY##_data = (VALUE), 0))

#endif

#endif	/* bits/libc-tsd.h */