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c3630df6 MO |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | ||
3 | //! Rust printing macros sample. | |
4 | ||
5 | use kernel::pr_cont; | |
6 | use kernel::prelude::*; | |
7 | ||
8 | module! { | |
9 | type: RustPrint, | |
b13c9880 GG |
10 | name: "rust_print", |
11 | author: "Rust for Linux Contributors", | |
12 | description: "Rust printing macros sample", | |
13 | license: "GPL", | |
c3630df6 MO |
14 | } |
15 | ||
16 | struct RustPrint; | |
17 | ||
f431c5c5 BF |
18 | fn arc_print() -> Result { |
19 | use kernel::sync::*; | |
20 | ||
cc41670e WAF |
21 | let a = Arc::new(1, GFP_KERNEL)?; |
22 | let b = UniqueArc::new("hello, world", GFP_KERNEL)?; | |
f431c5c5 BF |
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 | ||
c3630df6 MO |
42 | impl 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 | ||
f431c5c5 BF |
70 | arc_print()?; |
71 | ||
c3630df6 MO |
72 | Ok(RustPrint) |
73 | } | |
74 | } | |
75 | ||
76 | impl Drop for RustPrint { | |
77 | fn drop(&mut self) { | |
78 | pr_info!("Rust printing macros sample (exit)\n"); | |
79 | } | |
80 | } |