probe: windows mapped-file delete semantics (throwaway) - #579
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…orms Codex CLI's and Claude Code's default sandboxes deny the primitives fspy's Unix shared memory was built on: the macOS Seatbelt profile denies `shm_open` (`ipc-posix-shm-write-create`), and both sandboxes block Unix-domain sockets, which the Linux memfd broker depended on. Plain files in the temp directory are writable under both. Replace all three backends with one file-backed implementation attached by path: a sparse temporary file plus `memmap2`, with the file's absolute path as the identifier. No broker, no tokio requirement, no global object names. Lifetime semantics converge too: dropping the owner makes the name disappear and later opens fail, while existing views stay usable — now on Windows as well, where closing the delete-on-close handle applies the delete disposition even while other processes hold views. Refs #563. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Throwaway. Never merge. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
fspy benchmarklinuxmacoswindows |
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Probe done. Results: modern Windows removes a mapped file's name via remove_file even with live views and open share-delete handles; views and handles keep working. Design follows in #576. |
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Throwaway probe for a design question on #576: whether manual name removal of a live-mapped, handle-free file works on modern Windows. Will be closed without merging.
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