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/* Machine-dependent pthreads configuration and inline functions.
sparc version.
Copyright (C) 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson <rth@tamu.edu>.
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. */
/* Spinlock implementation; required. */
static inline int testandset(int *spinlock)
{
int ret;
__asm__ __volatile__("ldstub %1,%0"
: "=r"(ret), "=m"(*spinlock)
: "m"(*spinlock));
return ret;
}
/* Spinlock release; default is just set to zero. */
#define RELEASE(spinlock) \
__asm__ __volatile__("stbar; stb %1,%0" : "=m"(*(spinlock)) : "r"(0));
/* Get some notion of the current stack. Need not be exactly the top
of the stack, just something somewhere in the current frame. */
#define CURRENT_STACK_FRAME stack_pointer
register char * stack_pointer __asm__("%sp");
/* Registers %g6 and %g7 are reserved by the ABI for "system use". It
happens that Solaris uses %g6 for the thread pointer -- we do the same. */
struct _pthread_descr_struct;
register struct _pthread_descr_struct *__thread_self __asm__("%g6");
/* Return the thread descriptor for the current thread. */
#define THREAD_SELF __thread_self
/* Initialize the thread-unique value. */
#define INIT_THREAD_SELF(descr) (__thread_self = (descr))
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