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/* Machine-dependent pthreads configuration and inline functions.
FR-V version.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Alexandre Oliva <aoliva@redhat.com>
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 _PT_MACHINE_H
#define _PT_MACHINE_H 1
#include <features.h>
#ifndef __ASSEMBLER__
#ifndef PT_EI
# define PT_EI __extern_always_inline
#endif
/* Spinlock implementation; required. */
PT_EI long int
testandset (int *spinlock)
{
int i = 1;
__asm__ ("swap%I0 %M0, %1" : "+m"(*(volatile int *)spinlock), "+r"(i));
return i;
}
/* We want the OS to assign stack addresses. */
#define FLOATING_STACKS 1
/* This symbol is defined by the ABI as the stack size requested by
the main program. */
extern char __stacksize;
#define ARCH_STACK_MAX_SIZE ((unsigned long)&__stacksize)
/* Memory barrier; default is to do nothing */
#define MEMORY_BARRIER() __asm__ __volatile__("membar" : : : "memory")
/* Write barrier. */
#define WRITE_MEMORY_BARRIER() __asm__ __volatile__("membar" : : : "memory")
/* Return the thread descriptor for the current thread. */
register struct _pthread_descr_struct *THREAD_SELF __asm__ ("gr29");
#define THREAD_SELF THREAD_SELF
/* Initialize the thread-unique value. */
#define INIT_THREAD_SELF(descr, nr) \
(THREAD_SELF = descr)
/* 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");
#endif
#endif /* pt-machine.h */
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