mirror of
https://github.com/torvalds/linux.git
synced 2024-12-12 22:23:55 +00:00
f431c5c581
This both demonstrates the usage of different print format in Rust and serves as a selftest for the `Display` and `Debug` implementation of `Arc` and its friends. Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Reviewed-by: Björn Roy Baron <bjorn3_gh@protonmail.com> Reviewed-by: Finn Behrens <fin@nyantec.com> Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Andreas Hindborg <a.hindborg@samsung.com> Link: https://lore.kernel.org/r/20230207185216.1314638-3-boqun.feng@gmail.com [ Applied suggestions and reworded for fixing title typos. ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
81 lines
2.3 KiB
Rust
81 lines
2.3 KiB
Rust
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
//! Rust printing macros sample.
|
|
|
|
use kernel::pr_cont;
|
|
use kernel::prelude::*;
|
|
|
|
module! {
|
|
type: RustPrint,
|
|
name: "rust_print",
|
|
author: "Rust for Linux Contributors",
|
|
description: "Rust printing macros sample",
|
|
license: "GPL",
|
|
}
|
|
|
|
struct RustPrint;
|
|
|
|
fn arc_print() -> Result {
|
|
use kernel::sync::*;
|
|
|
|
let a = Arc::try_new(1)?;
|
|
let b = UniqueArc::try_new("hello, world")?;
|
|
|
|
// Prints the value of data in `a`.
|
|
pr_info!("{}", a);
|
|
|
|
// Uses ":?" to print debug fmt of `b`.
|
|
pr_info!("{:?}", b);
|
|
|
|
let a: Arc<&str> = b.into();
|
|
let c = a.clone();
|
|
|
|
// Uses `dbg` to print, will move `c` (for temporary debugging purposes).
|
|
dbg!(c);
|
|
|
|
// Pretty-prints the debug formatting with lower-case hexadecimal integers.
|
|
pr_info!("{:#x?}", a);
|
|
|
|
Ok(())
|
|
}
|
|
|
|
impl kernel::Module for RustPrint {
|
|
fn init(_module: &'static ThisModule) -> Result<Self> {
|
|
pr_info!("Rust printing macros sample (init)\n");
|
|
|
|
pr_emerg!("Emergency message (level 0) without args\n");
|
|
pr_alert!("Alert message (level 1) without args\n");
|
|
pr_crit!("Critical message (level 2) without args\n");
|
|
pr_err!("Error message (level 3) without args\n");
|
|
pr_warn!("Warning message (level 4) without args\n");
|
|
pr_notice!("Notice message (level 5) without args\n");
|
|
pr_info!("Info message (level 6) without args\n");
|
|
|
|
pr_info!("A line that");
|
|
pr_cont!(" is continued");
|
|
pr_cont!(" without args\n");
|
|
|
|
pr_emerg!("{} message (level {}) with args\n", "Emergency", 0);
|
|
pr_alert!("{} message (level {}) with args\n", "Alert", 1);
|
|
pr_crit!("{} message (level {}) with args\n", "Critical", 2);
|
|
pr_err!("{} message (level {}) with args\n", "Error", 3);
|
|
pr_warn!("{} message (level {}) with args\n", "Warning", 4);
|
|
pr_notice!("{} message (level {}) with args\n", "Notice", 5);
|
|
pr_info!("{} message (level {}) with args\n", "Info", 6);
|
|
|
|
pr_info!("A {} that", "line");
|
|
pr_cont!(" is {}", "continued");
|
|
pr_cont!(" with {}\n", "args");
|
|
|
|
arc_print()?;
|
|
|
|
Ok(RustPrint)
|
|
}
|
|
}
|
|
|
|
impl Drop for RustPrint {
|
|
fn drop(&mut self) {
|
|
pr_info!("Rust printing macros sample (exit)\n");
|
|
}
|
|
}
|