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/* Machine-dependent pthreads configuration and inline functions. sparc version. Copyright (C) 1996-1998, 2000-2003 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 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, see <http://www.gnu.org/licenses/>. */ #ifndef _PT_MACHINE_H #define _PT_MACHINE_H 1 #ifndef PT_EI # define PT_EI __extern_always_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__("ldstub %1,%0" : "=r"(ret), "=m"(*spinlock) : "m"(*spinlock)); return ret; } /* Memory barrier; default is to do nothing */ #define MEMORY_BARRIER() __asm__ __volatile__("stbar" : : : "memory") /* 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 + (2 * 64)) register char *stack_pointer __asm__("%sp"); /* Registers %g6 and %g7 are reserved by the ABI for "system use". %g7 is specified in the TLS ABI as thread pointer -- we do the same. */ struct _pthread_descr_struct; register struct _pthread_descr_struct *__thread_self __asm__("%g7"); /* Return the thread descriptor for the current thread. */ #define THREAD_SELF __thread_self /* Initialize the thread-unique value. */ #define INIT_THREAD_SELF(descr, nr) (__thread_self = (descr)) /* Access to data in the thread descriptor is easy. */ #define THREAD_GETMEM(descr, member) \ ((void) sizeof (descr), THREAD_SELF->member) #define THREAD_GETMEM_NC(descr, member) \ ((void) sizeof (descr), THREAD_SELF->member) #define THREAD_SETMEM(descr, member, value) \ ((void) sizeof (descr), THREAD_SELF->member = (value)) #define THREAD_SETMEM_NC(descr, member, value) \ ((void) sizeof (descr), THREAD_SELF->member = (value)) /* 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 8*1024*1024 #endif /* pt-machine.h */ |