dafd2e9f98
Each architecture may have a different method to enable logging. Now that can be customized with a function passed to the init_logger function. Also, provide a minimal x86_64 implementation. This is the first commit where you can see logging coming from the log crate. Signed-off-by: Wren Turkal <wt@penguintechs.org>
76 lines
1.8 KiB
Rust
76 lines
1.8 KiB
Rust
use alloc::collections::VecDeque;
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use core::sync::atomic::{AtomicBool, Ordering};
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use spin::Mutex;
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pub static LOG: Mutex<Option<Log>> = Mutex::new(None);
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pub fn init() {
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*LOG.lock() = Some(Log::new(1024 * 1024));
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}
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pub struct Log {
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data: VecDeque<u8>,
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size: usize,
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}
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impl Log {
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pub fn new(size: usize) -> Log {
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Log {
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data: VecDeque::with_capacity(size),
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size
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}
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}
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pub fn read(&self) -> (&[u8], &[u8]) {
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self.data.as_slices()
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}
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pub fn write(&mut self, buf: &[u8]) {
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for &b in buf {
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while self.data.len() + 1 >= self.size {
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self.data.pop_front();
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}
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self.data.push_back(b);
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}
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}
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}
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struct RedoxLogger {
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log_func: fn(&log::Record),
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pub initialized: AtomicBool,
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}
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impl ::log::Log for RedoxLogger {
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fn enabled(&self, _: &log::Metadata<'_>) -> bool {
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false
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}
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fn log(&self, record: &log::Record<'_>) {
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(self.log_func)(&record)
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}
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fn flush(&self) {}
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}
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pub fn init_logger(func: fn(&log::Record)) {
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unsafe {
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match LOGGER.initialized.load(Ordering::SeqCst) {
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false => {
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::log::set_max_level(::log::LevelFilter::Info);
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LOGGER.log_func = func;
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match ::log::set_logger(&LOGGER) {
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Ok(_) => ::log::info!("Logger initialized."),
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Err(e) => println!("Logger setup failed! error: {}", e),
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}
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LOGGER.initialized.store(true, Ordering::SeqCst);
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},
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true => ::log::info!("Tried to reinitialize the logger, which is not possible. Ignoring."),
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}
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}
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}
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static mut LOGGER: RedoxLogger = RedoxLogger {
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log_func: |_| {},
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initialized: AtomicBool::new(false),
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};
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pub use log::{debug, error, info, set_max_level, warn};
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