/* Machine-dependent pthreads configuration and inline functions. ARM version. Copyright (C) 1997, 1998, 2000, 2002, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Philip Blundell <philb@gnu.org>. 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> #ifndef PT_EI # define PT_EI __extern_always_inline #endif /* 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; __asm__ __volatile__("swp %0, %1, [%2]" : "=r"(ret) : "0"(1), "r"(spinlock)); 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 */