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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc3/] [libstdc++-v3/] [config/] [cpu/] [i486/] [atomicity.h] - Rev 424
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// Low-level functions for atomic operations: x86, x >= 4 version -*- C++ -*- // Copyright (C) 1999, 2000, 2001, 2004, 2005, 2009 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 3, or (at your option) // any later version. // 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. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. #include <ext/atomicity.h> _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) _Atomic_word __attribute__ ((__unused__)) __exchange_and_add(volatile _Atomic_word* __mem, int __val) throw () { register _Atomic_word __result; __asm__ __volatile__ ("lock; xadd{l} {%0,%1|%1,%0}" : "=r" (__result), "=m" (*__mem) : "0" (__val), "m" (*__mem)); return __result; } void __attribute__ ((__unused__)) __atomic_add(volatile _Atomic_word* __mem, int __val) throw () { __asm__ __volatile__ ("lock; add{l} {%1,%0|%0,%1}" : "=m" (*__mem) : "ir" (__val), "m" (*__mem)); } _GLIBCXX_END_NAMESPACE
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