50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* Copyright (C) 2012-2017 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@redhat.com>.
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This file is part of the GNU Atomic Library (libatomic).
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Libatomic is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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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 "libatomic_i.h"
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/* If we use the builtin we'll get __sync_synchronize, not __kernel_dmb. */
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#if !DONE && N <= WORDSIZE && !defined(HAVE_DMB) && !defined(HAVE_DMB_MCR)
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UTYPE
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SIZE(libat_load) (UTYPE *mptr, int smodel)
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{
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UTYPE ret;
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if (maybe_specialcase_relaxed(smodel))
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ret = *mptr;
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else
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{
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__kernel_dmb ();
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ret = *mptr;
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__kernel_dmb ();
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}
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return ret;
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}
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#define DONE 1
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#endif /* !HAVE_DMB */
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#include "../../../load_n.c"
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