| /* 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, |
| 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> |
| #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 */ |