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/* Machine-dependent pthreads configuration and inline functions. hppa version. Copyright (C) 2000, 2002, 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 #include <features.h> #include <bits/initspin.h> #ifndef PT_EI # define PT_EI __extern_always_inline #endif /* 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__ ("%r30"); /* The hppa only has one atomic read and modify memory operation, load and clear, so hppa spinlocks must use zero to signify that someone is holding the lock. */ #define xstr(s) str(s) #define str(s) #s /* Spinlock implementation; required. */ PT_EI long int testandset (int *spinlock) { int ret; __asm__ __volatile__( "ldcw 0(%2),%0" : "=r"(ret), "=m"(*spinlock) : "r"(spinlock)); return ret == 0; } #undef str #undef xstr #endif /* pt-machine.h */ |