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/* Definition for thread-local data handling. Hurd/Alpha version.
Copyright (C) 2002 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; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _TLS_H
#define _TLS_H
#if defined HAVE_TLS_SUPPORT && 0
/* Signal that TLS support is available. */
# define USE_TLS 1
/* Code to initially initialize the thread pointer. This might need
special attention since 'errno' is not yet available and if the
operation can cause a failure 'errno' must not be touched. */
# define TLS_INIT_TP(descr) \
do \
{ \
register tcbhead_t *_a0 __asm__ ("$16") = (descr); \
__asm__ ("call_pal %0" : : "i" (PAL_wruniq), "r" (_a0)); \
} while (0)
# define THREAD_TCB() \
({ \
register tcbhead_t *_rv __asm__ ("$0"); \
__asm__ ("call_pal %0" : "=r" (rv) : "i" (PAL_rduniq)); \
_rv; \
})
/* Install new dtv for current thread. */
# define INSTALL_NEW_DTV(dtv) (THREAD_DTV () = (dtv))
/* Return the address of the dtv for the current thread. */
# define THREAD_DTV() (THREAD_TCB ()->dtv)
#endif /* HAVE_TLS_SUPPORT */
#endif /* tls.h */
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