cd5b958d19
Introduce the welded comptime `compiler` library (`#library "compiler"` +
`abi(.zig) extern compiler`), per design/comptime-compiler-api.md, and unify
`callconv(...)` into the new `abi(...)` annotation.
abi(...) replaces callconv(...):
- New ABI enum { default, c, zig, pure }; `abi(.c|.zig|.pure)` parses in the
postfix slot before extern/export (and standalone). `kw_callconv` -> `kw_abi`.
- Migrated 52 sx files, the call-convention-mismatch diagnostic, and docs
(readme/specs) from `callconv(.c)` to `abi(.c)`.
Phase 1 — welded compiler library (parse -> registry -> validation -> bridge):
- `abi(.zig) extern compiler` parses on fn decls (carries abi/extern_lib) and
struct decls (StructDecl.abi/extern_lib).
- `#library "compiler"` is the comptime-only internal surface — never dlopen'd.
- src/ir/compiler_lib.zig: the binding registry (the safety boundary). `Field`
welded to StructInfo.Field with layout baked from the real Zig type
(@offsetOf/@sizeOf); `findType`/`findFn`. Welded structs are layout-validated
at registration (field set + total size) as a header checked against the impl.
- Host-call bridge: a `fn abi(.zig) extern compiler` dispatches under the
comptime interp to its registered Zig handler (intern/text_of round-trip),
never dlsym. IR Function.compiler_welded; validated in declareFunction.
- Comptime-only enforcement: a runtime call to a welded fn is a clean
build-gating error (emitCall), not an undefined-symbol link failure.
Phase 2.1 — byte-layout weld foundation:
- Decision: full byte-layout weld (sx struct laid out byte-identically to the
bound Zig type). Registered StructInfo (first non-natural / Zig-reordered
layout). `computeWeldPlan` — pure offset-ordered element plan + padding +
sx-field->LLVM-element remap; unit-tested. Emit/interp wiring is the next
sub-step (2.2+, see current/CHECKPOINT-COMPILER-API.md).
Examples: 0625/0626 (welded struct + fn round-trip), 1183/1184/1185
(layout-mismatch, unexported-fn, runtime-call diagnostics).
30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
// PLAN-HTTPZ C2: the C->sx re-entry contract. A real OS thread enters
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// sx through a `abi(.c)` entry (which has NO implicit context),
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// fabricates its own Context via `push Context.{ allocator = xx gpa }`,
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// and calls default-conv sx code that allocates through it.
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#import "modules/std.sx";
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clib :: #library "c";
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pthread_create :: (thread: *usize, attr: *void, start: (*void) -> *void abi(.c), arg: *void) -> i32 extern clib;
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pthread_join :: (thread: usize, retval: **void) -> i32 extern clib;
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entry :: (arg: *void) -> *void abi(.c) {
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p : *i64 = xx arg;
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gpa := GPA.init();
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push Context.{ allocator = xx gpa } {
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s := concat("th", "read"); // allocate through the thread's OWN context
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if s.len == 6 { p.* = p.* * 2; }
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}
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return null;
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}
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main :: () -> i32 {
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v : i64 = 21;
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th : usize = 0;
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if pthread_create(@th, null, entry, xx @v) != 0 { print("create failed\n"); return 1; }
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pthread_join(th, null);
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if v != 42 { print("wrong result: {}\n", v); return 1; }
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print("pthread into sx ok: {}\n", v);
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return 0;
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}
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