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allow configure page & segment sizes from build args

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i.e. compiler's commandline. This improves maintanability since one do
not have to modify upstream sources (which cause additional maintability
burden on updates)
This commit is contained in:
Vladimir 'virtul' Ivannikov 2023-05-23 22:02:37 +03:00
parent 24668b9daf
commit 864838d832
1 changed files with 4 additions and 0 deletions
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4
include/mimalloc/types.h
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@ -157,13 +157,17 @@ typedef int32_t mi_ssize_t;
// Main tuning parameters for segment and page sizes
// Sizes for 64-bit (usually divide by two for 32-bit)
#ifndef MI_SEGMENT_SLICE_SHIFT
#define MI_SEGMENT_SLICE_SHIFT (13 + MI_INTPTR_SHIFT) // 64KiB (32KiB on 32-bit)
#endif
#ifndef MI_SEGMENT_SHIFT
#if MI_INTPTR_SIZE > 4
#define MI_SEGMENT_SHIFT ( 9 + MI_SEGMENT_SLICE_SHIFT) // 32MiB
#else
#define MI_SEGMENT_SHIFT ( 7 + MI_SEGMENT_SLICE_SHIFT) // 4MiB on 32-bit
#endif
#endif
#define MI_SMALL_PAGE_SHIFT (MI_SEGMENT_SLICE_SHIFT) // 64KiB
#define MI_MEDIUM_PAGE_SHIFT ( 3 + MI_SMALL_PAGE_SHIFT) // 512KiB