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40 lines
1.8 KiB
C
40 lines
1.8 KiB
C
/*
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* Copyright (c) 2022 Ivan Maidanski
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/* As of clang-9, all __GCC_HAVE_SYNC_COMPARE_AND_SWAP_n are missing. */
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#define AO_GCC_FORCE_HAVE_CAS
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#if (__SIZEOF_SIZE_T__ == 4) \
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|| (defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16) && !defined(__clang__)) \
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|| (defined(__clang__) && __iset__ >= 5 /* elbrus-v5 or later */ \
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&& defined(AO_PREFER_BUILTIN_ATOMICS))
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/* Note for 128-bit operations: clang reports warning */
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/* "large atomic operation may incur significant performance penalty" */
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/* and requires LDFLAGS="-latomic", thus this is not on by default. */
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# define AO_GCC_HAVE_double_SYNC_CAS
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# include "../standard_ao_double_t.h"
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#endif
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#include "generic.h"
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#undef AO_GCC_FORCE_HAVE_CAS
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#undef AO_GCC_HAVE_double_SYNC_CAS
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