81 lines · rust
1// SPDX-License-Identifier: GPL-2.02 3//! Rust printing macros sample.4 5use kernel::pr_cont;6use kernel::prelude::*;7 8module! {9 type: RustPrint,10 name: "rust_print",11 author: "Rust for Linux Contributors",12 description: "Rust printing macros sample",13 license: "GPL",14}15 16struct RustPrint;17 18fn arc_print() -> Result {19 use kernel::sync::*;20 21 let a = Arc::new(1, GFP_KERNEL)?;22 let b = UniqueArc::new("hello, world", GFP_KERNEL)?;23 24 // Prints the value of data in `a`.25 pr_info!("{}", a);26 27 // Uses ":?" to print debug fmt of `b`.28 pr_info!("{:?}", b);29 30 let a: Arc<&str> = b.into();31 let c = a.clone();32 33 // Uses `dbg` to print, will move `c` (for temporary debugging purposes).34 dbg!(c);35 36 // Pretty-prints the debug formatting with lower-case hexadecimal integers.37 pr_info!("{:#x?}", a);38 39 Ok(())40}41 42impl kernel::Module for RustPrint {43 fn init(_module: &'static ThisModule) -> Result<Self> {44 pr_info!("Rust printing macros sample (init)\n");45 46 pr_emerg!("Emergency message (level 0) without args\n");47 pr_alert!("Alert message (level 1) without args\n");48 pr_crit!("Critical message (level 2) without args\n");49 pr_err!("Error message (level 3) without args\n");50 pr_warn!("Warning message (level 4) without args\n");51 pr_notice!("Notice message (level 5) without args\n");52 pr_info!("Info message (level 6) without args\n");53 54 pr_info!("A line that");55 pr_cont!(" is continued");56 pr_cont!(" without args\n");57 58 pr_emerg!("{} message (level {}) with args\n", "Emergency", 0);59 pr_alert!("{} message (level {}) with args\n", "Alert", 1);60 pr_crit!("{} message (level {}) with args\n", "Critical", 2);61 pr_err!("{} message (level {}) with args\n", "Error", 3);62 pr_warn!("{} message (level {}) with args\n", "Warning", 4);63 pr_notice!("{} message (level {}) with args\n", "Notice", 5);64 pr_info!("{} message (level {}) with args\n", "Info", 6);65 66 pr_info!("A {} that", "line");67 pr_cont!(" is {}", "continued");68 pr_cont!(" with {}\n", "args");69 70 arc_print()?;71 72 Ok(RustPrint)73 }74}75 76impl Drop for RustPrint {77 fn drop(&mut self) {78 pr_info!("Rust printing macros sample (exit)\n");79 }80}81