d8076b9333
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.
60 lines
2.1 KiB
Plaintext
60 lines
2.1 KiB
Plaintext
// Phase 0 baseline (PLAN-FFI.md step 0.6): sx function passed to C
|
|
// as a function pointer; C invokes it; sx-side observable effect.
|
|
// Mirrors the `app->onInputEvent` install pattern in
|
|
// library/modules/platform/android.sx.
|
|
//
|
|
// Two arities covered:
|
|
// 1. (i32) -> i32 — single-arg callback
|
|
// 2. (*void, i32) -> i32 — pointer + value (onInputEvent shape)
|
|
//
|
|
// Plus a side-effect via a global so we can confirm the callback
|
|
// actually fired (return value + state mutation both observable).
|
|
|
|
#import "modules/std.sx";
|
|
|
|
#import c {
|
|
#source "1214-ffi-06-callback.c";
|
|
};
|
|
|
|
ffi_apply_callback :: (cb: (i32) -> i32 callconv(.c), value: i32) -> i32 #foreign;
|
|
ffi_apply_callback2 :: (cb: (*void, i32) -> i32 callconv(.c), ctx: *void, v: i32) -> i32 #foreign;
|
|
|
|
g_callback_hits : i32 = 0;
|
|
g_callback_sum : i32 = 0;
|
|
|
|
double_it :: (x: i32) -> i32 callconv(.c) {
|
|
g_callback_hits += 1;
|
|
g_callback_sum += x;
|
|
x * 2
|
|
}
|
|
|
|
add_with_ctx :: (ctx: *void, v: i32) -> i32 callconv(.c) {
|
|
g_callback_hits += 1;
|
|
// Pass a sentinel via ctx to prove the pointer arg also survives the
|
|
// round-trip — read it back as an i32 through *i32.
|
|
p : *i32 = xx ctx;
|
|
p.* + v
|
|
}
|
|
|
|
main :: () -> i32 {
|
|
// ── Single-arg callback ────────────────────────────────────────
|
|
r1 := ffi_apply_callback(double_it, 21);
|
|
print("callback returned = {}\n", r1);
|
|
print("hits after first call = {}\n", g_callback_hits);
|
|
print("sum after first call = {}\n", g_callback_sum);
|
|
|
|
// Two more calls confirm the same fn pointer keeps working.
|
|
ffi_apply_callback(double_it, 7);
|
|
ffi_apply_callback(double_it, 11);
|
|
print("hits after three calls = {}\n", g_callback_hits);
|
|
print("sum after three calls = {}\n", g_callback_sum);
|
|
|
|
// ── Two-arg callback with opaque ctx pointer ───────────────────
|
|
ctx_val : i32 = 100;
|
|
r2 := ffi_apply_callback2(add_with_ctx, xx @ctx_val, 42);
|
|
print("ctx + value = {}\n", r2);
|
|
print("hits after ctx callback = {}\n", g_callback_hits);
|
|
|
|
0
|
|
}
|