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Define XXH_RESTRICT for some C++ compilers (gcc/clang/msvc/icc) #788

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Jan 25, 2023
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Define XXH_RESTRICT for some C++ compilers (gcc/clang/msvc/icc) #788

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12 changes: 10 additions & 2 deletions xxhash.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3020,11 +3020,19 @@ XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(XXH_NOESCAPE const XXH64_can
/* === Compiler specifics === */

#if ((defined(sun) || defined(__sun)) && __cplusplus) /* Solaris includes __STDC_VERSION__ with C++. Tested with GCC 5.5 */
# define XXH_RESTRICT /* disable */
# define XXH_RESTRICT /* disable */
#elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* >= C99 */
# define XXH_RESTRICT restrict
#elif (defined (__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))) \
|| (defined (__clang__)) \
|| (defined (_MSC_VER) && (_MSC_VER >= 1400)) \
|| (defined (__INTEL_COMPILER) && (__INTEL_COMPILER >= 1300))
/*
* There are a LOT more compilers that recognize __restrict but this
* covers the major ones.
*/
# define XXH_RESTRICT __restrict
#else
/* Note: it might be useful to define __restrict or __restrict__ for some C++ compilers */
# define XXH_RESTRICT /* disable */
#endif

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