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use core::fmt;
/// ## WARNING
///
/// This **will** leak memory without careful planning, as it does not run any destructors!
/// You need to make sure that all scopes end before calling this!
/// You can use
///
/// ```rust
/// fn main() {
/// {
/// // Main code
/// let a = vec![5];
/// }
/// ndless::process::abort();
/// }
/// ```
/// to ensure that no memory leaks.
pub fn abort() -> ! {
unsafe { ndless_sys::abort() }
}
/// ## WARNING
///
/// This **will** leak memory without careful planning, as it does not run any destructors!
/// You need to make sure that all scopes end before calling this!
/// You can either use
///
/// ```rust
/// fn main() {
/// {
/// // Main code
/// let a = vec![5];
/// }
/// ndless::process::exit(1);
/// }
/// ```
/// or
/// ```rust
/// fn main() {
/// ndless::process::exit({
/// // Main code
/// let a = vec![5];
/// 0
/// });
/// }
/// ```
/// to ensure that no memory leaks.
pub fn exit(code: i32) -> ! {
unsafe { ndless_sys::exit(code) }
}
/// A trait for implementing arbitrary return types in the `main` function.
///
/// The c-main function only supports to return integers as return type.
/// So, every type implementing the `Termination` trait has to be converted
/// to an integer.
///
/// The default implementations are returning 0 to indicate
/// a successful execution. In case of a failure, 1 is returned.
pub trait Termination {
/// Is called to get the representation of the value as status code.
/// This status code is returned to the operating system.
fn report(self) -> i32;
}
impl Termination for () {
#[inline]
fn report(self) -> i32 {
0
}
}
impl Termination for i32 {
#[inline]
fn report(self) -> i32 {
self
}
}
impl<E: fmt::Debug> Termination for Result<(), E> {
fn report(self) -> i32 {
match self {
Ok(()) => ().report(),
Err(err) => Err::<!, _>(err).report(),
}
}
}
impl Termination for ! {
fn report(self) -> i32 {
self
}
}
impl<E: fmt::Debug> Termination for Result<!, E> {
fn report(self) -> i32 {
let err = match self {
Err(err) => err,
_ => unreachable!(),
};
crate::msg::msg("Error", &alloc::format!("Error: {:?}", err));
1
}
}