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Add register main macro as alternative to agb::entry proc macro #535

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Add register main macro as alternative to agb::entry proc macro #535

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23 changes: 23 additions & 0 deletions agb/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -193,6 +193,29 @@ fn panic_implementation(info: &core::panic::PanicInfo) -> ! {
loop {}
}

#[macro_export]
macro_rules! register_main {
($entry_point: ident) => {
const fn entry_point_function_is_invalid(_: fn($crate::Gba) -> !) {}

const _: () = entry_point_function_is_invalid($entry_point);

#[cfg(not(test))]
#[export_name = "main"]
pub extern "C" fn entry_point() -> ! {
let gba = unsafe { $crate::Gba::new_in_entry() };
$entry_point(gba);
}

#[cfg(test)]
#[export_name = "main"]
pub extern "C" fn entry_point() -> ! {
let gba = unsafe { $crate::Gba::new_in_entry() };
$crate::test_runner::agb_start_tests(gba, test_main);
}
};
}

/// The Gba struct is used to control access to the Game Boy Advance's hardware in a way which makes it the
/// borrow checker's responsibility to ensure no clashes of global resources.
///
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