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Refs #150 -- document println #166

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Sep 2, 2019
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Refs #150 -- document println #166

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Refs #150 -- document println
alex Sep 2, 2019
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alex Sep 2, 2019
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Link to println
alex Sep 2, 2019
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7 changes: 7 additions & 0 deletions src/printk.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ extern "C" {
fn printk_helper(s: *const u8, len: c_int) -> c_int;
}

#[doc(hidden)]
pub fn printk(s: &[u8]) {
// TODO: I believe printk never fails
unsafe { printk_helper(s.as_ptr(), s.len() as c_int) };
Expand All @@ -17,6 +18,7 @@ pub fn printk(s: &[u8]) {
// From kernel/print/printk.c
const LOG_LINE_MAX: usize = 1024 - 32;

#[doc(hidden)]
pub struct LogLineWriter {
data: [u8; LOG_LINE_MAX],
pos: usize,
Expand Down Expand Up @@ -45,6 +47,11 @@ impl fmt::Write for LogLineWriter {
}
}

/// [`println!`] functions the same as it does in `std`, except instead of
/// printing to `stdout`, it writes to the kernel console at the `KERN_INFO`
/// level.
///
/// [`println!`]: https://doc.rust-lang.org/stable/std/macro.println.html
#[macro_export]
macro_rules! println {
() => ({
Expand Down