49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
// Low-level type for atomic operations -*- C++ -*-
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// Copyright (C) 2004, 2009 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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#ifndef _GLIBCXX_ATOMIC_WORD_H
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#define _GLIBCXX_ATOMIC_WORD_H 1
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#ifdef __arch64__
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typedef long _Atomic_word;
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#else
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typedef int _Atomic_word;
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#endif
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#if defined(__sparc_v9__)
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// These are necessary under the V9 RMO model, though it is almost never
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// used in userspace.
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#define _GLIBCXX_READ_MEM_BARRIER \
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__asm __volatile ("membar #LoadLoad":::"memory")
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#define _GLIBCXX_WRITE_MEM_BARRIER \
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__asm __volatile ("membar #StoreStore":::"memory")
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#elif defined(__sparc_v8__)
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// This is necessary under the PSO model.
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#define _GLIBCXX_WRITE_MEM_BARRIER __asm __volatile ("stbar":::"memory")
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#endif
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#endif
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