From a9f5aa1cc96fc2c71f19a9c3e9dcbee0e78f83ca Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 15 Nov 2005 03:13:04 +0000 Subject: rename current stable linuxthreads to linuxthreads.old to prepare for import of latest glibc version --- .../linuxthreads.old/sysdeps/arm/pt-machine.h | 70 ++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 libpthread/linuxthreads.old/sysdeps/arm/pt-machine.h (limited to 'libpthread/linuxthreads.old/sysdeps/arm') diff --git a/libpthread/linuxthreads.old/sysdeps/arm/pt-machine.h b/libpthread/linuxthreads.old/sysdeps/arm/pt-machine.h new file mode 100644 index 000000000..284567970 --- /dev/null +++ b/libpthread/linuxthreads.old/sysdeps/arm/pt-machine.h @@ -0,0 +1,70 @@ +/* Machine-dependent pthreads configuration and inline functions. + ARM version. + Copyright (C) 1997, 1998, 2000, 2002 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Philip Blundell . + + 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 int *p, long int oldval, long int newval); + +/* This will not work on ARM1 or ARM2 because SWP is lacking on those + machines. Unfortunately we have no way to detect this at compile + time; let's hope nobody tries to use one. */ + +/* Spinlock implementation; required. */ +PT_EI long int +testandset (int *spinlock) +{ + register unsigned int ret; + +#if defined(__thumb__) + void *pc; + __asm__ __volatile__( + ".align 0\n" + "\tbx pc\n" + "\tnop\n" + "\t.arm\n" + "\tswp %0, %2, [%3]\n" + "\torr %1, pc, #1\n" + "\tbx %1\n" + "\t.force_thumb" + : "=r"(ret), "=r"(pc) + : "0"(1), "r"(spinlock)); +#else + __asm__ __volatile__("swp %0, %1, [%2]" + : "=r"(ret) + : "0"(1), "r"(spinlock)); +#endif + + return ret; +} + + +/* 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__ ("sp"); + +#endif /* pt-machine.h */ -- cgit v1.2.3