//! Storage-layer platform abstractions (Issue #504, #508).
//!
//! Centralises every `cfg(target_os)` / `cfg(unix)` switch used by
//! the file storage backend so the rest of `storage/` can stay
//! platform-agnostic. New per-OS knobs go here, not inline in the
//! call site.
//!
//! # Layout
//!
//! - [`unix`] — Unix-family impl (Linux, macOS, BSDs).
//! - [`windows`] — Windows impl.
//! - The dispatcher re-exports each function from the matching
//! submodule via a `#[cfg]` gate, so callers see a single uniform
//! API regardless of host OS.
pub use default_use_mmap;
pub use default_use_mmap;