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Emap: Move in merge functionality.

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This commit is contained in:
David Goldblatt
2020-02-03 14:15:07 -08:00
committed by David Goldblatt
parent 040eac77cc
commit 0586a56f39
3 changed files with 44 additions and 25 deletions
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37
src/emap.c
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@@ -236,3 +236,40 @@ emap_split_commit(tsdn_t *tsdn, emap_t *emap,
emap_rtree_write_acquired(tsdn, emap, split_prepare->trail_elm_a,
split_prepare->trail_elm_b, trail, szind_b, slab_b);
}
void
emap_merge_prepare(tsdn_t *tsdn, emap_t *emap, rtree_ctx_t *rtree_ctx,
emap_split_prepare_t *split_prepare, edata_t *lead, edata_t *trail) {
emap_rtree_leaf_elms_lookup(tsdn, emap, rtree_ctx, lead, true, false,
&split_prepare->lead_elm_a, &split_prepare->lead_elm_b);
emap_rtree_leaf_elms_lookup(tsdn, emap, rtree_ctx, trail, true, false,
&split_prepare->trail_elm_a, &split_prepare->trail_elm_b);
}
void
emap_merge_commit(tsdn_t *tsdn, emap_t *emap,
emap_split_prepare_t *split_prepare, edata_t *lead, edata_t *trail) {
if (split_prepare->lead_elm_b != NULL) {
rtree_leaf_elm_write(tsdn, &emap->rtree,
split_prepare->lead_elm_b, NULL, SC_NSIZES, false);
}
rtree_leaf_elm_t *merged_b;
if (split_prepare->trail_elm_b != NULL) {
rtree_leaf_elm_write(tsdn, &emap->rtree,
split_prepare->trail_elm_a, NULL, SC_NSIZES, false);
merged_b = split_prepare->trail_elm_b;
} else {
merged_b = split_prepare->trail_elm_a;
}
edata_size_set(lead, edata_size_get(lead) + edata_size_get(trail));
edata_szind_set(lead, SC_NSIZES);
edata_sn_set(lead, (edata_sn_get(lead) < edata_sn_get(trail)) ?
edata_sn_get(lead) : edata_sn_get(trail));
edata_zeroed_set(lead, edata_zeroed_get(lead)
&& edata_zeroed_get(trail));
emap_rtree_write_acquired(tsdn, emap, split_prepare->lead_elm_a,
merged_b, lead, SC_NSIZES, false);
}