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refactor header alignment check in bucket storage (#33326)

This commit is contained in:
Jeff Washington (jwash) 2023-09-20 12:57:27 -07:00 committed by GitHub
parent d27aaa79c8
commit b7bac74d47
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1 changed files with 13 additions and 8 deletions
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21
bucket_map/src/bucket_storage.rs
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@ -142,14 +142,8 @@ impl<O: BucketOccupied> BucketStorage<O> {
stats: Arc<BucketStats>,
count: Arc<AtomicU64>,
) -> (Self, u128) {
let offset = O::offset_to_first_data();
let size_of_u64 = std::mem::size_of::<u64>();
assert_eq!(
offset / size_of_u64 * size_of_u64,
offset,
"header size must be a multiple of u64"
);
let cell_size = elem_size * num_elems + offset as u64;
let offset = Self::get_offset_to_first_data();
let cell_size = elem_size * num_elems + offset;
let bytes = Self::allocate_to_fill_page(&mut capacity, cell_size);
let (mmap, path, file_name) = Self::new_map(&drives, bytes, &stats);
(
@ -213,6 +207,17 @@ impl<O: BucketOccupied> BucketStorage<O> {
)
}
fn get_offset_to_first_data() -> u64 {
let offset = O::offset_to_first_data() as u64;
let size_of_u64 = std::mem::size_of::<u64>() as u64;
assert_eq!(
offset / size_of_u64 * size_of_u64,
offset,
"header size must be a multiple of u64"
);
offset
}
pub(crate) fn copying_entry(&mut self, ix_new: u64, other: &Self, ix_old: u64) {
let start = self.get_start_offset_with_header(ix_new);
let start_old = other.get_start_offset_with_header(ix_old);