Files
sx/examples/1323-ffi-objc-arc-00b-multi-instance.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

75 lines
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// ffi-objc-arc-00b — multi-instance allocator threading.
//
// Verifies that EACH sx-defined-class instance captures its own
// allocator and round-trips through it. Catches bugs where:
// - the captured allocator is shared across instances (one global
// slot instead of per-instance).
// - alloc captures the wrong allocator on the 2nd+ instance.
// - dealloc reads garbage if state[0] is overwritten between
// instances.
//
// Three instances → three alloc events → three dealloc events. The
// tracker observes exactly +3 / +3 deltas.
#import "modules/std.sx";
#import "modules/std/mem.sx";
#import "modules/ffi/objc.sx";
#import "modules/build.sx";
SxMultiProbe :: #objc_class("SxMultiProbe") {
#extends NSObject;
a: i32;
b: i32;
alloc :: () -> *SxMultiProbe;
}
main :: () -> i32 {
inline if OS == .macos {
gpa := GPA.init();
tracker := TrackingAllocator.init(xx gpa);
push Context.{ allocator = xx tracker, data = null } {
alloc_before := tracker.alloc_count;
dealloc_before := tracker.dealloc_count;
f1 := SxMultiProbe.alloc();
f2 := SxMultiProbe.alloc();
f3 := SxMultiProbe.alloc();
alloc_after_three := tracker.alloc_count - alloc_before;
f1.release();
f2.release();
f3.release();
alloc_delta := tracker.alloc_count - alloc_before;
dealloc_delta := tracker.dealloc_count - dealloc_before;
// alloc_delta MAY include extras from autorelease/etc. but
// each SxMultiProbe.alloc contributes at least 1. Check the
// BALANCE: every alloc paired with a dealloc.
if dealloc_delta != alloc_delta {
print("FAIL: alloc/dealloc unbalanced; alloc={} dealloc={}\n",
alloc_delta, dealloc_delta);
return 1;
}
if alloc_after_three < 3 {
print("FAIL: 3 SxMultiProbe.alloc()s should produce >= 3 tracker allocs; saw {}\n",
alloc_after_three);
return 1;
}
if dealloc_delta < 3 {
print("FAIL: 3 release()s should produce >= 3 tracker deallocs; saw {}\n",
dealloc_delta);
return 1;
}
}
print("multi-instance round-trip: ok\n");
}
inline if OS != .macos {
print("skipped (not macos)\n");
}
0
}