dope-kqueue 0.2.3

Thin io_uring adaptor with "Manifolds"
Documentation 
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use std::cell::Cell;

use super::Driver;

pub type CurrentSlot = dope_core::driver::CurrentSlot<crate::KqueueBackend>;

thread_local! {
    static CURRENT: Cell<Option<CurrentSlot>> = const { Cell::new(None) };
}

pub fn set_current(slot: Option<CurrentSlot>) {
    CURRENT.with(|cell| cell.set(slot));
}

pub fn current() -> Option<CurrentSlot> {
    CURRENT.with(|cell| cell.get())
}

pub(crate) fn current_driver_mut_ptr() -> *mut Driver {
    CURRENT.with(|cell| match cell.get() {
        Some(slot) => slot.driver().as_ptr(),
        None => std::ptr::null_mut(),
    })
}

pub fn current_driver_mut<'a>() -> &'a mut Driver {
    let p = current_driver_mut_ptr();
    assert!(
        !p.is_null(),
        "dope-kqueue invariant violated: no current driver"
    );

    unsafe { &mut *p }
}