Files
sx/examples/1401-ffi-jni-call-02-void.sx
agra d8076b9333 lang: rename signed integer types sN -> iN
Surface rename of the signed integer family: s1..s64 become i1..i64
(u1..u64, usize, isize unchanged). 'string' keeps the s-prefix arm in
name classification; width parsing moves to the i-prefix arm next to
isize.

Internal TypeId tags follow the surface (.s8/.s16/.s32/.s64 ->
.i8/.i16/.i32/.i64), as do mono-key mangle fragments (ptr_i64,
tu_i64_bool) and all display/diagnostic formatting (i{d}).

Migrated in the same sweep: stdlib + examples + issue repros + FFI C
companions (shared symbol names like ffi_id_i64), expected
stdout/stderr/ir snapshots, specs.md, readme.md, CLAUDE.md/AGENTS.md,
implementation_plan.md, docs/, issue writeups. Vendored stb_image and
historical flow state left untouched.

zig build test: 426/426; examples suite: 595/595.
2026-06-12 09:31:53 +03:00

46 lines
1.8 KiB
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// Phase 1 step 1.15 (PLAN-FFI.md): `#jni_call(void)` codegen.
//
// `#jni_call(T)(env, target, "method_name", "(Sig)RetSig", args...)`
// dispatches a JNI instance-method call. The lowering hand-emits the
// vtable indirection:
//
// ifs = *env // JNINativeInterface*
// cls = ifs->GetObjectClass(env, target)
// mid = ifs->GetMethodID(env, cls, name, sig)
// ifs->Call<Type>Method(env, target, mid, args...)
//
// Phase 1.17 introduces method-ID caching via static slots populated
// at module-init; this step keeps the per-call-site lookup.
//
// Host can't dlopen libjvm via the JIT, so the JNI body is gated
// behind `inline if OS == .android`. The macOS test path strips the
// body and prints "skipped"; the cross_compile.sh Android target
// verifies that the gated body actually compiles + links against
// libjvm in the Android sysroot.
#import "modules/std.sx";
#import "modules/build.sx";
// Android target requires a `#jni_main` Activity declaration to
// satisfy the entry-point check. An empty stub class is enough — this
// file is testing `#jni_call` lowering, not Activity wiring.
SxJniCallVoidStub :: #jni_main #jni_class("co/swipelab/sxjnicall/SxJniCallVoidStub") { }
main :: () -> i32 {
inline if OS == .android {
// Real Android entry passes env + target via the user's `onCreate`
// / `#jni_attach`. For the cross-compile-only test we just need
// the lowering to emit valid IR; runtime correctness is exercised
// by the chess sx_android_query_safe_insets path.
env : *void = null;
target : *void = null;
#jni_env(env) {
#jni_call(void)(target, "noop", "()V");
}
}
inline if OS != .android {
print("skipped (not android)\n");
}
0
}