1 // SPDX-License-Identifier: GPL-2.0
3 //! Rust printing macros sample.
6 use kernel::prelude::*;
11 author: "Rust for Linux Contributors",
12 description: "Rust printing macros sample",
18 fn arc_print() -> Result {
21 let a = Arc::try_new(1)?;
22 let b = UniqueArc::try_new("hello, world")?;
24 // Prints the value of data in `a`.
27 // Uses ":?" to print debug fmt of `b`.
30 let a: Arc<&str> = b.into();
33 // Uses `dbg` to print, will move `c` (for temporary debugging purposes).
36 // Pretty-prints the debug formatting with lower-case hexadecimal integers.
37 pr_info!("{:#x?}", a);
42 impl kernel::Module for RustPrint {
43 fn init(_module: &'static ThisModule) -> Result<Self> {
44 pr_info!("Rust printing macros sample (init)\n");
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");
54 pr_info!("A line that");
55 pr_cont!(" is continued");
56 pr_cont!(" without args\n");
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);
66 pr_info!("A {} that", "line");
67 pr_cont!(" is {}", "continued");
68 pr_cont!(" with {}\n", "args");
76 impl Drop for RustPrint {
78 pr_info!("Rust printing macros sample (exit)\n");