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