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This commit is contained in:
Joe Thornber
2013-03-14 13:13:18 +00:00
parent add23c1709
commit 12dff31358
6 changed files with 477 additions and 16 deletions
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19
persistent-data/data-structures/array.h
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@ -56,11 +56,13 @@ namespace persistent_data {
struct array_dim {
array_dim(unsigned nr_entries, unsigned entries_per_block)
: nr_full_blocks(nr_entries / entries_per_block),
nr_entries_in_last_block(nr_entries % entries_per_block) {
nr_entries_in_last_block(nr_entries % entries_per_block),
nr_total_blocks(nr_full_blocks + (nr_entries_in_last_block ? 1 : 0)) {
}
unsigned nr_full_blocks;
unsigned nr_entries_in_last_block;
unsigned nr_total_blocks;
};
unsigned calc_max_entries(size_t value_size, size_t block_size)
@ -143,8 +145,8 @@ namespace persistent_data {
array(tm_ptr tm,
typename ValueTraits::ref_counter rc,
unsigned nr_entries,
block_address root)
block_address root,
unsigned nr_entries)
: tm_(tm),
entries_per_block_(rblock::calc_max_entries()),
nr_entries_(nr_entries),
@ -207,8 +209,10 @@ namespace persistent_data {
else if (old_dim_.nr_entries_in_last_block > 0)
grow_extend_tail_block(new_dim_.nr_entries_in_last_block);
else
else if (new_dim_.nr_entries_in_last_block)
grow_add_tail_block();
a_.nr_entries_ = new_nr_entries;
}
private:
@ -230,17 +234,16 @@ namespace persistent_data {
if (old_dim_.nr_entries_in_last_block > 0)
grow_extend_tail_block(entries_per_block_);
insert_full_ablocks(old_dim_.nr_full_blocks + (old_dim_.nr_entries_in_last_block ? 1 : 0),
new_dim_.nr_full_blocks);
insert_full_ablocks(old_dim_.nr_total_blocks, new_dim_.nr_full_blocks);
if (new_dim_.nr_entries_in_last_block > 0)
grow_add_tail_block();
}
void grow_extend_tail_block(unsigned new_nr_entries) {
uint64_t last_block = div_up<uint64_t>(a_.nr_entries_, entries_per_block_);
uint64_t last_block = a_.nr_entries_ / entries_per_block_;
wblock b = a_.shadow_ablock(last_block);
b.grow(new_nr_entries % entries_per_block_, v_);
b.grow(new_nr_entries, v_);
}
array<ValueTraits> &a_;