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https://github.com/GerbilSoft/zlib-ng.git
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89f90d3e9c
Using "_WIN32" to decide, if the MSVC extensions _aligned_malloc / _aligned_free are available is a bug that breaks other Compiler on Windows. (OpenWatcom as Example) Regards ... Detlef
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* 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(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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#elif defined(HAVE_MEMALIGN) || defined(HAVE__ALIGNED_MALLOC)
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# include <malloc.h>
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#else
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/* Fallback, when no other aligned allocation function was found */
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# include <stdlib.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_ALIGNED_ALLOC
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/* Size must be a multiple of alignment */
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size = (size + (64 - 1)) & ~(64 - 1);
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return (void *)aligned_alloc(64, size); /* Defined in C11 */
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#elif defined(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(HAVE__ALIGNED_MALLOC)
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/* Fallback: Use MSVC extensions: _aligned_malloc() / _aligned_free() */
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return (void *)_aligned_malloc(size, 64);
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#elif defined(HAVE_MEMALIGN)
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/* Fallback: Use deprecated GNU extension: memalign() */
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return (void *)memalign(64, size);
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#else
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/* Fallback: Use a normal allocation (On macOS, alignment is 16 bytes) */
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/* zlib-ng adjust allocations for [de]compression to be properly aligned */
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return (void *)malloc(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(HAVE__ALIGNED_MALLOC) && !defined(HAVE_POSIX_MEMALIGN) && !defined(HAVE_ALIGNED_ALLOC)
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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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#endif
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