From 2e1397254005fe0828088b2f5b1a0eb5604c9f4e Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Fri, 18 Feb 2005 16:33:15 +0000 Subject: Merge pt-machine.h for the blackfin from the Analog source tree. --- libpthread/linuxthreads/sysdeps/bfin/pt-machine.h | 57 +++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 libpthread/linuxthreads/sysdeps/bfin/pt-machine.h diff --git a/libpthread/linuxthreads/sysdeps/bfin/pt-machine.h b/libpthread/linuxthreads/sysdeps/bfin/pt-machine.h new file mode 100644 index 000000000..fef16263e --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/bfin/pt-machine.h @@ -0,0 +1,57 @@ +/* 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 . + + 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 */ -- cgit v1.2.3