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rust: error: declare errors using macro

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Add a macro to declare errors, which simplifies the work needed to
add each one, avoids repetition of the code and makes it easier to
change the way they are declared.

Signed-off-by: Finn Behrens <me@kloenk.dev>
Reviewed-by: Gary Guo <gary@garyguo.net>
[Reworded, adapted for upstream and applied latest changes]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Finn Behrens 2022-11-10 17:41:20 +01:00 committed by Miguel Ojeda
parent b13c9880f9
commit 4b0c68bd0d
1 changed files with 10 additions and 2 deletions
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12
rust/kernel/error.rs
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@ -8,8 +8,16 @@ use alloc::collections::TryReserveError;
/// Contains the C-compatible error codes.
pub mod code {
/// Out of memory.
pub const ENOMEM: super::Error = super::Error(-(crate::bindings::ENOMEM as i32));
macro_rules! declare_err {
($err:tt $(,)? $($doc:expr),+) => {
$(
#[doc = $doc]
)*
pub const $err: super::Error = super::Error(-(crate::bindings::$err as i32));
};
}
declare_err!(ENOMEM, "Out of memory.");
}
/// Generic integer kernel error.