view liboctave/util/oct-atomic.c @ 30564:796f54d4ddbf stable

update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2021. In all .txi and .texi files except gpl.txi and gpl.texi in the doc/liboctave and doc/interpreter directories, change the copyright to "Octave Project Developers", the same as used for other source files. Update copyright notices for 2022 (not done since 2019). For gpl.txi and gpl.texi, change the copyright notice to be "Free Software Foundation, Inc." and leave the date at 2007 only because this file only contains the text of the GPL, not anything created by the Octave Project Developers. Add Paul Thomas to contributors.in.
author John W. Eaton <jwe@octave.org>
date Tue, 28 Dec 2021 18:22:40 -0500
parents 0a5b15007766
children d9970470108a
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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2019-2022 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave 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 of the License, or
// (at your option) any later version.
//
// Octave 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 Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include "oct-atomic.h"

/* Some versions of GCC can't compile stdatomic.h with -fopenmp.  */

#if defined (OCTAVE_STDATOMIC_H_OK)
#  include <stdatomic.h>

octave_idx_type
octave_atomic_increment (octave_idx_type *x)
{
  // This cast appears to be needed for some versions of clang.
  atomic_fetch_add ((_Atomic octave_idx_type *) x, 1);

  return *x;
}

octave_idx_type
octave_atomic_decrement (octave_idx_type *x)
{
  // This cast appears to be needed for some versions of clang.
  atomic_fetch_sub ((_Atomic octave_idx_type *) x, 1);

  return *x;
}

#elif defined (__GNUC__)

octave_idx_type
octave_atomic_increment (octave_idx_type *x)
{
  return __sync_add_and_fetch (x,  1);
}

octave_idx_type
octave_atomic_decrement (octave_idx_type *x)
{
  return __sync_sub_and_fetch (x, 1);
}

#elif defined (_MSC_VER)
#  include <intrin.h>

octave_idx_type
octave_atomic_increment (octave_idx_type *x)
{
#if defined (OCTAVE_ENABLE_64)
  return _InterlockedIncrement64 (x);
#else
  return _InterlockedIncrement (x);
#endif
}

octave_idx_type
octave_atomic_decrement (octave_idx_type *x)
{
#if defined (OCTAVE_ENABLE_64)
  return _InterlockedDecrement64 (x);
#else
  return _InterlockedDecrement (x);
#endif
}

#else
#  error "Octave requires atomic integer increment and decrement functions"
#endif