/* Machine-dependent pthreads configuration and inline functions. SuperH version. Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Niibe Yutaka <gniibe@m17n.org>. 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 #ifndef __ASSEMBLER__ #ifndef PT_EI # define PT_EI extern inline #endif extern long int testandset (int *spinlock); extern int __compare_and_swap (long int *p, long int oldval, long int newval); /* Spinlock implementation; required. */ PT_EI long int testandset (int *spinlock) { int ret; __asm__ __volatile__( "tas.b @%1\n\t" "movt %0" : "=r" (ret) : "r" (spinlock) : "memory", "cc"); return (ret == 0); } /* We want the OS to assign stack addresses. */ #define FLOATING_STACKS 1 /* Maximum size of the stack if the rlimit is unlimited. */ #define ARCH_STACK_MAX_SIZE 32*1024*1024 /* 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__ ("r15"); /* Return the thread descriptor for the current thread. */ struct _pthread_descr_struct; #define THREAD_SELF \ ({ struct _pthread_descr_struct *self; \ __asm__("stc gbr,%0" : "=r" (self)); self;}) /* Initialize the thread-unique value. */ #define INIT_THREAD_SELF(descr, nr) \ ({ __asm__ __volatile__("ldc %0,gbr" : : "r" (descr));}) /* Access to data in the thread descriptor is easy. */ #define THREAD_GETMEM(descr, member) THREAD_SELF->member #define THREAD_GETMEM_NC(descr, member) THREAD_SELF->member #define THREAD_SETMEM(descr, member, value) THREAD_SELF->member = (value) #define THREAD_SETMEM_NC(descr, member, value) THREAD_SELF->member = (value) #endif /* __ASSEMBLER__ */ #endif /* pt-machine.h */