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72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
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/* zutil_p.h -- Private inline functions used internally in zlib-ng
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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#ifndef ZUTIL_P_H
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#define ZUTIL_P_H
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#if defined(__APPLE__) || defined(HAVE_POSIX_MEMALIGN) || defined(HAVE_ALIGNED_ALLOC)
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# include <stdlib.h>
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#elif defined(__FreeBSD__)
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# include <stdlib.h>
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# include <malloc_np.h>
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#else
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# include <malloc.h>
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#endif
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/* Function to allocate 16 or 64-byte aligned memory */
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static inline void *zng_alloc(size_t size) {
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#ifdef HAVE_POSIX_MEMALIGN
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void *ptr;
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return posix_memalign(&ptr, 64, size) ? NULL : ptr;
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#elif defined(_WIN32)
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return (void *)_aligned_malloc(size, 64);
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#elif defined(__APPLE__)
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return (void *)malloc(size); /* MacOS always aligns to 16 bytes */
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#elif defined(HAVE_ALIGNED_ALLOC)
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return (void *)aligned_alloc(64, size);
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#else
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return (void *)memalign(64, size);
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#endif
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}
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/* Function that can free aligned memory */
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static inline void zng_free(void *ptr) {
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#if defined(_WIN32)
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_aligned_free(ptr);
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#else
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free(ptr);
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#endif
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}
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/* Use memcpy instead of memcmp to avoid older compilers not converting memcmp calls to
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unaligned comparisons when unaligned access is supported. */
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static inline int32_t zng_memcmp_2(const void *src0, const void *src1) {
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uint16_t src0_cmp, src1_cmp;
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memcpy(&src0_cmp, src0, sizeof(src0_cmp));
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memcpy(&src1_cmp, src1, sizeof(src1_cmp));
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return src0_cmp != src1_cmp;
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}
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static inline int32_t zng_memcmp_4(const void *src0, const void *src1) {
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uint32_t src0_cmp, src1_cmp;
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memcpy(&src0_cmp, src0, sizeof(src0_cmp));
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memcpy(&src1_cmp, src1, sizeof(src1_cmp));
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return src0_cmp != src1_cmp;
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}
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static inline int32_t zng_memcmp_8(const void *src0, const void *src1) {
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uint64_t src0_cmp, src1_cmp;
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memcpy(&src0_cmp, src0, sizeof(src0_cmp));
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memcpy(&src1_cmp, src1, sizeof(src1_cmp));
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return src0_cmp != src1_cmp;
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}
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#endif
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