81 lines
2.3 KiB
Rust
81 lines
2.3 KiB
Rust
use std::collections::HashMap;
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use std::sync::{Arc, Mutex};
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use tokio::time::{self, Duration};
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use crate::callback::{CallbackBus, TimerEvent};
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struct TimerEntry {
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handle: tokio::task::JoinHandle<()>,
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}
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/// Timer syscall: delayed and periodic execution with callback delivery.
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pub struct TimerSyscall {
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timers: Arc<Mutex<HashMap<String, TimerEntry>>>,
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next_id: Mutex<u64>,
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bus: Arc<CallbackBus>,
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}
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impl TimerSyscall {
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pub fn new(bus: Arc<CallbackBus>) -> Self {
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Self {
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timers: Arc::new(Mutex::new(HashMap::new())),
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next_id: Mutex::new(1),
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bus,
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}
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}
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/// Schedule a one-shot timer. When it fires, a TimerEvent is sent to the plugin.
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pub fn once(&self, delay_ms: u64, callback_id: String, plugin_id: String) -> String {
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let timer_id = {
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let mut next = self.next_id.lock().unwrap();
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let id = format!("timer_{}", *next);
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*next += 1;
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id
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};
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let tid = timer_id.clone();
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let cb = callback_id.clone();
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let pid = plugin_id.clone();
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let bus = self.bus.clone();
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let timers = self.timers.clone();
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let handle = tokio::spawn(async move {
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time::sleep(Duration::from_millis(delay_ms)).await;
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tracing::info!("timer fired: id={} callback={} plugin={}", tid, cb, pid);
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bus.fire(
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&pid,
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TimerEvent {
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timer_id: tid.clone(),
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callback_id: cb,
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},
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);
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timers.lock().unwrap().remove(&tid);
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});
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self.timers.lock().unwrap().insert(
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timer_id.clone(),
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TimerEntry {
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handle,
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},
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);
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timer_id
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}
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pub fn cancel(&self, timer_id: &str) -> Result<(), String> {
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let mut timers = self.timers.lock().unwrap();
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if let Some(entry) = timers.remove(timer_id) {
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entry.handle.abort();
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Ok(())
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} else {
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Err(format!("timer {} not found", timer_id))
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}
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}
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pub fn now(&self) -> i64 {
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std::time::SystemTime::now()
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.duration_since(std::time::UNIX_EPOCH)
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.unwrap_or_default()
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.as_millis() as i64
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}
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}
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