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pma: when persisting hamt check if buffer already in PMA

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This commit is contained in:
Edward Amsden 2023-12-15 00:15:04 -06:00
parent ff204263ff
commit a37cf3e779
1 changed files with 14 additions and 1 deletions
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15
rust/ares/src/hamt.rs
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@ -719,18 +719,31 @@ impl<T: Copy + Persist> Persist for Hamt<T> {
let stem_ptr: *mut Stem<T> = &mut (*next_entry_ptr).stem;
let stem_size = (*stem_ptr).size();
if pma_contains((*stem_ptr).buffer, stem_size) {
continue;
}
let stem_buffer_ptr = *buffer as *mut Entry<T>;
copy_nonoverlapping((*stem_ptr).buffer, stem_buffer_ptr, stem_size);
*buffer = stem_buffer_ptr.add(stem_size) as *mut u8;
(*stem_ptr).buffer = stem_buffer_ptr;
traversal[depth + 1] = *stem_ptr;
depth += 1;
} else {
// Leaf case
let leaf_ptr: *mut Leaf<T> = &mut (*next_entry_ptr).leaf;
if (*leaf_ptr).len == 0 {
continue;
}
if pma_contains((*leaf_ptr).buffer, (*leaf_ptr).len) {
continue;
}
let leaf_buffer_ptr = *buffer as *mut (Noun, T);
copy_nonoverlapping((*leaf_ptr).buffer, leaf_buffer_ptr, (*leaf_ptr).len);