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33 lines
1.1 KiB
C
33 lines
1.1 KiB
C
/*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*/
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#if defined(__clang__) || defined(AO_PREFER_BUILTIN_ATOMICS)
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/* All __GCC_HAVE_SYNC_COMPARE_AND_SWAP_n macros are still missing. */
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/* The operations are lock-free even for the types smaller than word. */
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# define AO_GCC_FORCE_HAVE_CAS
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#else
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/* As of gcc-7.5, CAS and arithmetic atomic operations for char and */
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/* short are supported by the compiler but require -latomic flag. */
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# if !defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1)
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# define AO_NO_char_ARITHM
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# endif
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# if !defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2)
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# define AO_NO_short_ARITHM
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# endif
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#endif /* !__clang__ */
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#include "generic.h"
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#undef AO_GCC_FORCE_HAVE_CAS
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#undef AO_NO_char_ARITHM
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#undef AO_NO_short_ARITHM
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