608ff34d55
96/96 regression tests pass (+ffi-09-foreign-result-chain).
Opaque C-handle pattern that mirrors how real sx code threads
MTLBuffer*, AAssetManager*, file pointers, etc. through composite
sx values. C side has a trivial heap-int handle (`ffi_chain_make`
returning `void*`, `ffi_chain_bump` / `_peek` / `_dispose`). The sx
side exercises:
1. Chained calls — make -> bump -> bump -> peek; one handle
threaded through four FFI sites in sequence.
2. Struct field — `Counter { handle: *void; label: string; }`
hosts the handle; methods/accesses go through
`.handle` to feed back into C.
3. List(*void) — push N handles, iterate, peek each, iterate
again to bump each, iterate again to read
back. Catches any aliasing / lifetime breakage
when handles round-trip through the slice
backing of List.
11 lines
446 B
C
11 lines
446 B
C
// Trivial opaque-handle pattern — `make` produces a heap-allocated
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// counter, `bump` returns the new value, `peek` reads without
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// mutating, `dispose` frees. Mirrors the shape of real C handles
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// (MTLBuffer*, AAssetManager*, file pointers, etc.) without pulling
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// in any platform deps.
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void *ffi_chain_make (int seed);
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int ffi_chain_bump (void *h, int delta);
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int ffi_chain_peek (void *h);
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void ffi_chain_dispose (void *h);
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