/* Copyright (C) 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Maciej W. Rozycki <macro@ds2.pg.gda.pl>, 2000. 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; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef _SYS_TAS_H #define _SYS_TAS_H 1 #include <features.h> #include <sgidefs.h> #include <sys/sysmips.h> __BEGIN_DECLS extern int _test_and_set (int *p, int v) __THROW; #ifdef __USE_EXTERN_INLINES # ifndef _EXTERN_INLINE # define _EXTERN_INLINE extern __inline # endif # if (_MIPS_ISA >= _MIPS_ISA_MIPS2) _EXTERN_INLINE int _test_and_set (int *p, int v) __THROW { int r, t; __asm__ __volatile__ ("1:\n\t" "ll %0,%3\n\t" ".set push\n\t" ".set noreorder\n\t" "beq %0,%4,2f\n\t" " move %1,%4\n\t" ".set pop\n\t" "sc %1,%2\n\t" "beqz %1,1b\n" "2:\n" : "=&r" (r), "=&r" (t), "=m" (*p) : "m" (*p), "r" (v) : "memory"); return r; } # else /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */ _EXTERN_INLINE int _test_and_set (int *p, int v) __THROW { return sysmips (MIPS_ATOMIC_SET, (int) p, v, 0); } # endif /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */ #endif /* __USE_EXTERN_INLINES */ __END_DECLS #endif /* sys/tas.h */