Files
sx/examples/ffi/1214-ffi-06-callback.h
agra 66bdc70bf1 test: group examples into per-category folders
Move examples/*.sx and their expected/ snapshots into per-category
subfolders (examples/<category>/...). Folder = leading filename token,
with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus
runner and LSP sweep now discover each category's expected/ dir, while
issues/ stays flat. Example 1058's repo-root-relative companion import
is made file-relative. Path strings embedded in 164 snapshots were
regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
2026-06-21 14:41:34 +03:00

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C

// C-to-sx callback FFI baseline. C takes a function pointer + a value,
// invokes the callback with the value, and returns whatever the callback
// returned. Mirrors the `app->onInputEvent` pattern in
// library/modules/platform/android.sx where sx installs a handler that
// native_app_glue invokes from its input-event loop.
int ffi_apply_callback(int (*cb)(int), int value);
// Two-arg variant — the actual chess-on-Android shape:
// the callback receives a pointer + a value (mirrors
// onInputEvent(app, event) where both are opaque pointers from
// the C caller's point of view).
int ffi_apply_callback2(int (*cb)(void *ctx, int v), void *ctx, int v);