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83d416fa09
{{{
svn merge -r3061:3225 https://svn.tokutek.com/tokudb/tokudb.558
}}}
Fixes #630.
Addresses #558.
git-svn-id: file:///svn/tokudb@3226 c7de825b-a66e-492c-adef-691d508d4ae1
47 lines
2.2 KiB
C
47 lines
2.2 KiB
C
#include "memory.h"
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struct gpma {
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enum typ_tag tag;
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unsigned int N; /* How long is the array? Always a power of two >= 4. */
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u_int32_t n_items_present; /* How many array elements are non-null. */
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struct gitem *items; /* A malloced array. If any item's DATA is null, then it's not in use. */
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double udt_step; /* upper density threshold step */
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/* Each doubling decreases the density by density step.
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* For example if array_len=256 and uplgN=8 then there are 5 doublings.
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* Regions of size 8 are full. Regions of size 16 are 90% full.
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* Regions of size 32 are 80% full. Regions of size 64 are 70% full.
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* Regions of size 128 are 60% full. Regions of size 256 are 50% full.
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* The density step is 0.10. */
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double ldt_step; /* lower density threshold step */
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};
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#define GPMA_MIN_ARRAY_SIZE 4
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/* density thresholds */
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#define GPMA_LDT_HIGH 0.25
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#define GPMA_LDT_LOW 0.40
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#define GPMA_UDT_HIGH 1.00
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#define GPMA_UDT_LOW 0.50
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/* Expose these for testing purposes */
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u_int32_t toku_gpma_find_index_bes (GPMA pma, gpma_besselfun_t besf, int direction, void *extra, int *found);
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u_int32_t toku_gpma_find_index (GPMA pma, u_int32_t len, void *data, gpma_compare_fun_t compare, void *extra, int *found);
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int toku_lg (unsigned int n);
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u_int32_t toku_hyperceil (u_int32_t v);
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int toku_max_int (int, int);
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int toku_gpma_smooth_region (GPMA pma,
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u_int32_t lo, u_int32_t hi,
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u_int32_t count, // The number of nonnull values
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u_int32_t idx, u_int32_t *newidxp, gpma_renumber_callback_t rcall, void *extra,
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u_int32_t old_N);
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int toku_make_space_at (GPMA pma, u_int32_t idx, u_int32_t *newidx, gpma_renumber_callback_t rcall, void *extra);
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void toku_gpma_distribute (GPMA pma,
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u_int32_t lo, u_int32_t hi,
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u_int32_t count,
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struct gitem *items, // some of these may be NULL data, be we leave space for them anyway.
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/*out*/ u_int32_t *tos // the indices where the values end up (we fill this in)
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);
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int toku_smooth_deleted_region (GPMA pma, u_int32_t minidx, u_int32_t maxidx, gpma_renumber_callback_t renumberf, void *extra_for_renumberf);
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