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Dario LipicarandClaude Opus 5
9664ae219d
A module has no way to finish work before it is torn down. The host stops it,
its destructors run, and anything mid-flight is simply gone. This adds the two
symbols that let a module say "not yet" and then "done":
int logos_module_about_to_unload(void);
void logos_module_set_unload_done_callback(cb, user_data);
Returning 1 buys a BOUNDED grace period, not a veto. A module that never
signals delays every teardown by that period and is torn down anyway, so the
deadline is real rather than a courtesy -- said in the header, because the
alternative is authors discovering it from a shutdown that got slower.
OPTIONAL, and that is load-bearing rather than politeness. The glue that calls
these is generated alongside the module, so a cdylib built before they existed
exports neither and its glue emits no calls: an older module keeps exactly the
teardown it always had, with no version negotiation and no new failure mode.
Header-only; no implementation and no behaviour change in this repo. The
emitters live in logos-cpp-sdk (C++ exports) and logos-plugin-qt (the Qt glue
that reaches them), and the host-side wait in logos-module-loader-qt.
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>