/* Machine-dependent pthreads configuration and inline functions. Copyright (C) 1996, 1998, 2000, 2002 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 #ifndef PT_EI # define PT_EI extern inline #endif extern long int testandset (int *spinlock); extern int __compare_and_swap (long *, long , long); /* Spinlock implementation; required. */ PT_EI long int testandset (int *spinlock) { if (*spinlock) return 1; else { *spinlock=1; return 0; } } #define HAS_COMPARE_AND_SWAP PT_EI int __compare_and_swap (long int *p, long int oldval, long int newval) { if((*p ^ oldval) == 0) { *p = newval; return 1; } else return 0; } #endif /* pt-machine.h */