Function full_capacity_slice

nodedb-wal/src/double_write.rs:436–440

View the entire allocated capacity of `buf` as a byte slice. Requires that the caller has zeroed any unwritten tail (see `zero_tail`).

(buf: &AlignedBuf)

/// View the entire allocated capacity of `buf` as a byte slice. Requires
/// that the caller has zeroed any unwritten tail (see `zero_tail`).
fn full_capacity_slice(buf: &AlignedBuf) -> &[u8] {
    // SAFETY: AlignedBuf guarantees `as_ptr` points to `capacity()` valid
    // bytes (alloc_zeroed) for the lifetime of the buffer.
    unsafe { std::slice::from_raw_parts(buf.as_ptr(), buf.capacity()) }
}

/// `pwrite`-retry helper that handles short writes.
fn pwrite_all(file: &File, data: &[u8], offset: u64) -> Result<()> {