81 lines
3.0 KiB
C
81 lines
3.0 KiB
C
/* util.h */
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#ifndef UTIL_H
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#define UTIL_H
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#include <stdlib.h> /* for aligned_alloc and __GLIBC__ version macros */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* compile-time assert */
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#define RHASH_ASSERT(cond) (void)sizeof(char[1 - 2 * !(cond)])
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#if (defined(__GNUC__) && __GNUC__ >= 4 && (__GNUC__ > 4 || __GNUC_MINOR__ >= 1) \
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&& defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)) \
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|| (defined(__INTEL_COMPILER) && !defined(_WIN32))
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/* atomic operations are defined by ICC and GCC >= 4.1, but by the later one supposedly not for ARM */
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/* note: ICC on ia64 platform possibly require ia64intrin.h, need testing */
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# define atomic_compare_and_swap(ptr, oldval, newval) __sync_val_compare_and_swap(ptr, oldval, newval)
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#elif defined(_MSC_VER)
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# include <windows.h>
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# define atomic_compare_and_swap(ptr, oldval, newval) InterlockedCompareExchange(ptr, newval, oldval)
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#elif defined(__sun)
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# include <atomic.h>
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# define atomic_compare_and_swap(ptr, oldval, newval) atomic_cas_32(ptr, oldval, newval)
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#else
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/* pray that it will work */
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# define atomic_compare_and_swap(ptr, oldval, newval) { if (*(ptr) == (oldval)) *(ptr) = (newval); }
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# define NO_ATOMIC_BUILTINS
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#endif
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/* alignment macros */
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#define DEFAULT_ALIGNMENT 64
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#define ALIGN_SIZE_BY(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
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#define IS_SIZE_ALIGNED_BY(size, align) (((size) & ((align) - 1)) == 0)
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#define IS_PTR_ALIGNED_BY(ptr, align) IS_SIZE_ALIGNED_BY((uintptr_t)(ptr), (align))
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/* define rhash_aligned_alloc() and rhash_aligned_free() */
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#if !defined(NO_WIN32_ALIGNED_ALLOC) && defined(_WIN32)
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# define HAS_WIN32_ALIGNED_ALLOC
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# include <malloc.h>
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# define rhash_aligned_alloc(alignment, size) _aligned_malloc((size), (alignment))
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# define rhash_aligned_free(ptr) _aligned_free(ptr)
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#elif !defined(NO_STDC_ALIGNED_ALLOC) && (__STDC_VERSION__ >= 201112L || defined(_ISOC11_SOURCE)) \
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&& !(defined(__GLIBC__) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 15))) \
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&& !(defined(__ibmxl__) && defined(__clang__) && defined(__linux__)) \
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&& !defined(__APPLE__) && !defined(__HAIKU__) && !defined(__sun) \
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&& (!defined(__ANDROID_API__) || __ANDROID_API__ >= 28)
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# define HAS_STDC_ALIGNED_ALLOC
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# define rhash_aligned_alloc(alignment, size) aligned_alloc((alignment), ALIGN_SIZE_BY(size, alignment))
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# define rhash_aligned_free(ptr) free(ptr)
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#else /* defined(_WIN32) ... */
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# include "ustd.h" /* for _POSIX_VERSION macro */
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# if !defined(NO_POSIX_ALIGNED_ALLOC) && (_POSIX_VERSION >= 200112L || _XOPEN_SOURCE >= 600)
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# define HAS_POSIX_ALIGNED_ALLOC
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# define rhash_aligned_alloc(alignment, size) rhash_px_aalloc((alignment), ALIGN_SIZE_BY(size, sizeof(void*)))
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# define rhash_aligned_free(ptr) free(ptr)
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void* rhash_px_aalloc(size_t size, size_t alignment);
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# else
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# define HAS_GENERIC_ALIGNED_ALLOC
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void* rhash_aligned_alloc(size_t alignment, size_t size);
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void rhash_aligned_free(void* ptr);
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# endif /* !defined(NO_POSIX_ALIGNED_ALLOC) ... */
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#endif /* defined(_WIN32) ... */
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#ifdef __cplusplus
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} /* extern "C" */
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#endif /* __cplusplus */
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#endif /* UTIL_H */
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