From c6d5cdc3679ba4806be5b2cef80cdd417ee177cb Mon Sep 17 00:00:00 2001 From: Fenrir Date: Fri, 23 Feb 2024 18:25:43 -0700 Subject: [PATCH] Add error applet panic hook --- ctru-rs/src/applets/error.rs | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/ctru-rs/src/applets/error.rs b/ctru-rs/src/applets/error.rs index c60c4a8..584a2b4 100644 --- a/ctru-rs/src/applets/error.rs +++ b/ctru-rs/src/applets/error.rs @@ -79,6 +79,34 @@ impl PopUp { } } +/// Sets a custom panic hook that uses the error applet to display panic messages. You can also choose to have +/// messages printed over stderr along with the pop-up display. +/// +/// SAFETY: The error applet requires that both the [`Apt`] and [`Gfx`] services are active whenever it launches. +/// By calling this function, you promise that you will keep those services alive until either the program ends or +/// you unregister this hook with [`std::panic::take_hook`](https://doc.rust-lang.org/std/panic/fn.take_hook.html). +pub unsafe fn set_panic_hook(use_stderr: bool) { + std::panic::set_hook(Box::new(move |panic_info| { + let mut popup = PopUp::new(Kind::Top); + + let thread = std::thread::current(); + + let name = thread.name().unwrap_or(""); + + let payload = format!("thread '{name}' {panic_info}"); + + popup.set_text(&payload); + + if use_stderr { + eprintln!("{payload}"); + } + + unsafe { + ctru_sys::errorDisp(popup.state.as_mut()); + } + })) +} + impl std::fmt::Display for Error { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { match self {