57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
// Low-level functions for atomic operations: AIX version -*- C++ -*-
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// Copyright (C) 2000-2020 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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#include <ext/atomicity.h>
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/* We cannot use the cpu/powerpc/bits/atomicity.h inline assembly
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definitions for these operations since they depend on operations
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that are not available on the original POWER architecture. AIX
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still runs on the POWER architecture, so it would be incorrect to
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assume the existence of these instructions.
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The definition of _Atomic_word must match the type pointed to by
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atomic_p in <sys/atomic_op.h>. */
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extern "C"
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{
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#include <sys/atomic_op.h>
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}
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namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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_Atomic_word
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__attribute__ ((__unused__))
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__exchange_and_add (volatile _Atomic_word* __mem, int __val) throw ()
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{ return ::fetch_and_add(const_cast<atomic_p>(__mem), __val); }
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void
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__attribute__ ((__unused__))
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__atomic_add (volatile _Atomic_word* __mem, int __val) throw ()
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{ (void) ::fetch_and_add(const_cast<atomic_p>(__mem), __val); }
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace
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