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