Brummel
832375f2ac
All 176 files in the four accumulating directories now use a zero-padded 4-digit counter prefix that reflects creation order (`NNNN-slug.md`). The counter is assigned per directory in strict git-log creation order; ties broken alphabetically by original name. The old `YYYY-MM-DD-` prefix on docs/specs/ and docs/plans/ files is dropped — the date is recoverable from git log and the counter carries the ordering. A file's counter is stable for the life of the file: never reassigned, never reused, never compacted. Deleted files retire their counter; subsequent files do not fill the gap. This is the property that lets cross-references stay literal — refs use the full filename including the counter (`design/contracts/0007-honesty-rule.md`) so they grep cleanly and resolve directly without a glob step. 313 cross-references updated across .md/.rs/.toml/.c/.json files (test pins, include_str! paths, design-INDEX entries, baseline notes, runtime C comments, inter-contract markdown links incl. bare basename and `../models/foo.md` forms). CLAUDE.md gets a new "File-naming convention" section spelling out the rule and rationale. skills/brainstorm/SKILL.md and skills/planner/SKILL.md updated so new spec/plan creation produces counter-prefixed names from the start. The full test suite (cargo test --workspace) passes.
3.4 KiB
Embedding ABI
Embedding ABI
ail build --emit=staticlib compiles a module to a relocatable
lib<entry>.a (program objects only) plus a separate
libailang_rt.a (the RC runtime: rc.c + str.c), with no
@main trampoline and no MissingEntryMain requirement — a
kernel module is a library.
Each fn carrying (export "<sym>") (schema: FnDef.export) is
emitted as an externally-visible C entrypoint @<sym> forwarding to
the internal @ail_<module>_<fn>. The symbol is author-chosen and
decoupled from the ail_<module>_<def> mangling so a module/fn
rename does not move the C symbol.
The set that can cross the boundary is exactly: Int (lowered
i64), Float (lowered double), or a single-constructor record
whose every field is one of those (crossing as a bare ptr to the
box layout below); the fn's effect set must be empty. There is no
general value-marshalling layer — the host hand-constructs and
hand-reads that box layout directly, so the enumerated set is the
whole contract, narrow by construction, not a subset of a wider
embedding ABI. Because the box layout is the host's contract
surface with no accessor indirection, it is a one-way commitment
frozen as of M3: a compiler change MUST NOT move the box offsets
below for an exported type, nor invert the host-free rule.
These are enforced at ail check (export-non-scalar-signature,
export-has-effects) — an effectful or non-scalar export fails to
typecheck. Every exported entrypoint takes a mandatory leading ailang_ctx_t*
(M2): a per-thread embedding context created by ailang_ctx_new()
and released by ailang_ctx_free(), owned by the calling thread for
its lifetime. The host links one ailang_ctx_t per OS worker thread
and the runtime accounts RC alloc/free into it: the per-allocation
hot path (the per-ctx counters and the per-object refcount header)
is non-atomic by design and never shared — a box never crosses a
thread (Ctx: !Send) and each ailang_ctx_t is
single-thread-per-ctx. The one datum a multi-threaded host shares
is the global RC-stats fallback counter (used when no ctx is
bound); it is atomic-relaxed so the swarm's leak accounting is
exact. The swarm artefact is data-race-free, sanitiser-verified.
The staticlib swarm artefact is RC-only:
ail build --emit=staticlib rejects --alloc=bump (the bench
stub is leak-only and not swarm-safe; --alloc=gc no longer
exists as a CLI value — see the Boehm-retirement iter). The
value/record
layout is frozen as of M3 (see Frozen value layout); the
ctx-threaded C signature is the M2 shape.
Export parameters are written bare: a scalar type carries no
own/borrow mode (a single-constructor record export parameter,
by contrast, carries own/borrow — see memory model
for the full ownership contract; the
frozen value layout below specifies how that contract lands at the C ABI). The
canonical M1 export shape:
(fn step
(export "backtest_step")
(type
(fn-type
(params (con Int) (con Int))
(ret (con Int))))
(params state sample)
(body
(app + state (app * sample sample))))
ail emit-ir <module> --emit=staticlib prints this kernel's LLVM
IR (the external @<sym> forwarders, no @main) instead of the
executable-path main-required rejection — the Decision-5
IR-readability affordance for a main-free kernel.
Ratified by: crates/ailang-codegen/tests/embed_record_layout_pin.rs.