esp_wifi/
tasks.rs

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use crate::{
    compat::timer_compat::TIMERS,
    preempt::{task_create, yield_task},
    time::systimer_count,
};

/// Initializes the `timer` task for the Wi-Fi driver.
pub(crate) fn init_tasks() {
    // schedule the timer task
    task_create(timer_task, core::ptr::null_mut(), 8192);
}

/// Entry point for the timer task responsible for handling scheduled timer
/// events.
pub(crate) extern "C" fn timer_task(_param: *mut esp_wifi_sys::c_types::c_void) {
    loop {
        let current_timestamp = systimer_count();
        let to_run = TIMERS.with(|timers| {
            let to_run = unsafe { timers.find_next_due(current_timestamp) }?;

            to_run.active = to_run.periodic;

            if to_run.periodic {
                to_run.started = current_timestamp;
            }

            Some(to_run.callback)
        });

        // run the due timer callback NOT in an interrupt free context
        if let Some(to_run) = to_run {
            trace!("trigger timer....");
            to_run.call();
            trace!("timer callback called");
        } else {
            yield_task();
        }
    }
}