1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 2
3 //! Rust printing macros sample. 3 //! Rust printing macros sample.
4 4
5 use kernel::pr_cont; 5 use kernel::pr_cont;
6 use kernel::prelude::*; 6 use kernel::prelude::*;
7 7
8 module! { 8 module! {
9 type: RustPrint, 9 type: RustPrint,
10 name: "rust_print", 10 name: "rust_print",
11 author: "Rust for Linux Contributors", 11 author: "Rust for Linux Contributors",
12 description: "Rust printing macros sample" 12 description: "Rust printing macros sample",
13 license: "GPL", 13 license: "GPL",
14 } 14 }
15 15
16 struct RustPrint; 16 struct RustPrint;
17 17
18 fn arc_print() -> Result { <<
19 use kernel::sync::*; <<
20 <<
21 let a = Arc::new(1, GFP_KERNEL)?; <<
22 let b = UniqueArc::new("hello, world", GFP <<
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 <<
34 dbg!(c); <<
35 <<
36 // Pretty-prints the debug formatting with <<
37 pr_info!("{:#x?}", a); <<
38 <<
39 Ok(()) <<
40 } <<
41 <<
42 impl kernel::Module for RustPrint { 18 impl kernel::Module for RustPrint {
43 fn init(_module: &'static ThisModule) -> R 19 fn init(_module: &'static ThisModule) -> Result<Self> {
44 pr_info!("Rust printing macros sample 20 pr_info!("Rust printing macros sample (init)\n");
45 21
46 pr_emerg!("Emergency message (level 0) 22 pr_emerg!("Emergency message (level 0) without args\n");
47 pr_alert!("Alert message (level 1) wit 23 pr_alert!("Alert message (level 1) without args\n");
48 pr_crit!("Critical message (level 2) w 24 pr_crit!("Critical message (level 2) without args\n");
49 pr_err!("Error message (level 3) witho 25 pr_err!("Error message (level 3) without args\n");
50 pr_warn!("Warning message (level 4) wi 26 pr_warn!("Warning message (level 4) without args\n");
51 pr_notice!("Notice message (level 5) w 27 pr_notice!("Notice message (level 5) without args\n");
52 pr_info!("Info message (level 6) witho 28 pr_info!("Info message (level 6) without args\n");
53 29
54 pr_info!("A line that"); 30 pr_info!("A line that");
55 pr_cont!(" is continued"); 31 pr_cont!(" is continued");
56 pr_cont!(" without args\n"); 32 pr_cont!(" without args\n");
57 33
58 pr_emerg!("{} message (level {}) with 34 pr_emerg!("{} message (level {}) with args\n", "Emergency", 0);
59 pr_alert!("{} message (level {}) with 35 pr_alert!("{} message (level {}) with args\n", "Alert", 1);
60 pr_crit!("{} message (level {}) with a 36 pr_crit!("{} message (level {}) with args\n", "Critical", 2);
61 pr_err!("{} message (level {}) with ar 37 pr_err!("{} message (level {}) with args\n", "Error", 3);
62 pr_warn!("{} message (level {}) with a 38 pr_warn!("{} message (level {}) with args\n", "Warning", 4);
63 pr_notice!("{} message (level {}) with 39 pr_notice!("{} message (level {}) with args\n", "Notice", 5);
64 pr_info!("{} message (level {}) with a 40 pr_info!("{} message (level {}) with args\n", "Info", 6);
65 41
66 pr_info!("A {} that", "line"); 42 pr_info!("A {} that", "line");
67 pr_cont!(" is {}", "continued"); 43 pr_cont!(" is {}", "continued");
68 pr_cont!(" with {}\n", "args"); 44 pr_cont!(" with {}\n", "args");
69 <<
70 arc_print()?; <<
71 45
72 Ok(RustPrint) 46 Ok(RustPrint)
73 } 47 }
74 } 48 }
75 49
76 impl Drop for RustPrint { 50 impl Drop for RustPrint {
77 fn drop(&mut self) { 51 fn drop(&mut self) {
78 pr_info!("Rust printing macros sample 52 pr_info!("Rust printing macros sample (exit)\n");
79 } 53 }
80 } 54 }
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