nya

kubi/Cargo.toml

@@ -51,6 +51,7 @@ winapi = { version = "0.3", features = ["wincon"] }
 default = ["raw-evt-mouse"]
 raw-evt-keyboard = [] # use raw input for keyboard. works on x11 and windows, breaks keyboard on android and wayland
 raw-evt-mouse = [] # required for mouse input
+c-ffi = [] # generate a C-ffi-compatible `kubi_main` entry point (useful if building as a shared library)
 generate_visualizer_data = ["dep:serde_json", "shipyard/serde1"]
 safe_lz4 = ["lz4_flex/safe-encode", "lz4_flex/safe-decode"]
 parallel = ["shipyard/parallel"] # causes some serious issues!

kubi/src/lib.rs

@@ -189,16 +189,30 @@ fn attach_console() {
   unsafe { AttachConsole(ATTACH_PARENT_PROCESS); }
 }
 
-#[unsafe(no_mangle)]
 #[cfg(target_os = "android")]
+#[unsafe(no_mangle)]
 pub fn android_main(app: android_activity::AndroidApp) {
   use android_activity::WindowManagerFlags;
   app.set_window_flags(WindowManagerFlags::FULLSCREEN, WindowManagerFlags::empty());
-  kubi_main(app)
+  kubi_main_impl(app);
 }
 
+#[cfg(feature = "c-ffi")]
+#[cfg(not(target_os = "android"))]
 #[unsafe(no_mangle)]
-pub fn kubi_main(
+pub extern "C" fn kubi_main() {
+  // cant let unwinds cross the ffi boundary!
+  // also, hopefully this code should never panic either...
+  let panic = std::panic::catch_unwind(|| {
+    kubi_main_impl();
+  });
+  if panic.is_err() {
+    println!("!!! PANIC CAUGHT ON FFI BOUNDARY !!!");
+  };
+  std::mem::forget(panic); // forget the result, as dropping it will cause unwinding!
+}
+
+pub fn kubi_main_impl(
   #[cfg(target_os = "android")]
   app: android_activity::AndroidApp
 ) {

kubi/src/main.rs

@@ -4,5 +4,5 @@
 )]
 
 fn main() {
-  kubilib::kubi_main();
+  kubilib::kubi_main_impl();
 }