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atomicity.h

// Low-level functions for atomic operations: AIX version  -*- C++ -*-

// Copyright (C) 2000, 2001 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.

// 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 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

/* We cannot use the cpu/powerpc/bits/atomicity.h inline assembly
   definitions for these operations since they depend on operations
   that are not available on the original POWER architecture.  AIX
   still runs on the POWER architecture, so it would be incorrect to
   assume the existence of these instructions.  */

/* This should match the type pointed to by atomic_p in
   <sys/atomic_op.h>.  */
typedef int _Atomic_word;

#include <sys/atomic_op.h>

static inline int
__attribute__ ((__unused__))
__exchange_and_add (atomic_p __mem, int __val)
{
  return fetch_and_add (__mem, __val);
}

static inline void
__attribute__ ((__unused__))
__atomic_add (atomic_p __mem, int __val)
{
  (void) fetch_and_add (__mem, __val);
}

#endif /* atomicity.h */

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