diff options
Diffstat (limited to 'libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h')
| -rw-r--r-- | libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h | 61 |
1 files changed, 40 insertions, 21 deletions
diff --git a/libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h b/libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h index 9b6690a153e..573c56b3603 100644 --- a/libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h +++ b/libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h @@ -1,32 +1,52 @@ -/* Low-level functions for atomic operations. Sparc32 version. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. +// Low-level functions for atomic operations: Sparc32 version -*- C++ -*- - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. +// Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, 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 - Library General Public License for more details. +// This 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 General Public License for more details. - You should have received a copy of the GNU Library 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. */ +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, +// USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. #ifndef _BITS_ATOMICITY_H #define _BITS_ATOMICITY_H 1 typedef int _Atomic_word; +template <int __inst> +struct __Atomicity_lock +{ + static unsigned char _S_atomicity_lock; +}; + +template <int __inst> +unsigned char __Atomicity_lock<__inst>::_S_atomicity_lock = 0; + +template unsigned char __Atomicity_lock<0>::_S_atomicity_lock; + static int __attribute__ ((__unused__)) __exchange_and_add (volatile _Atomic_word* __mem, int __val) { - static unsigned char __lock; _Atomic_word __result, __tmp; __asm__ __volatile__("1: ldstub [%1], %0\n\t" @@ -34,13 +54,13 @@ __exchange_and_add (volatile _Atomic_word* __mem, int __val) " bne 1b\n\t" " nop" : "=&r" (__tmp) - : "r" (&__lock) + : "r" (&__Atomicity_lock<0>::_S_atomicity_lock) : "memory"); __result = *__mem; *__mem += __val; __asm__ __volatile__("stb %%g0, [%0]" : /* no outputs */ - : "r" (&__lock) + : "r" (&__Atomicity_lock<0>::_S_atomicity_lock) : "memory"); return __result; } @@ -49,7 +69,6 @@ static void __attribute__ ((__unused__)) __atomic_add (volatile _Atomic_word* __mem, int __val) { - static unsigned char __lock; _Atomic_word __tmp; __asm__ __volatile__("1: ldstub [%1], %0\n\t" @@ -57,12 +76,12 @@ __atomic_add (volatile _Atomic_word* __mem, int __val) " bne 1b\n\t" " nop" : "=&r" (__tmp) - : "r" (&__lock) + : "r" (&__Atomicity_lock<0>::_S_atomicity_lock) : "memory"); *__mem += __val; __asm__ __volatile__("stb %%g0, [%0]" : /* no outputs */ - : "r" (&__lock) + : "r" (&__Atomicity_lock<0>::_S_atomicity_lock) : "memory"); } |