?? pt-machine.h
字號:
/* Machine-dependent pthreads configuration and inline functions. H8/300 version. 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#endifextern long int testandset (int *spinlock);/* Spinlock implementation; required. */PT_EI long inttestandset (int *spinlock){ char ret; __asm__ __volatile__( "sub.w %0,%0\n\t" "stc ccr,@-sp\n\t" "orc #0x80,ccr\n\t" "bld #0,@%2\n\t" "bset #0,@%2\n\t" "rotxl.w %0\n\t" "ldc @sp+,ccr\n\t" :"=r"(ret),"=m"(*spinlock) :"g"(spinlock) :"cc"); 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_pointerregister char * stack_pointer __asm__ ("%sp");#endif /* pt-machine.h */
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