Struct kernel::process::cpu::IntrLock

pub struct IntrLock {
    pub is_enabled_before: bool,
    pub cnt: UnsafeCell<isize>,
    pub hart_id: usize,
}

Control interrupt

Equivalent to xv-6 push_off and pop_off functions.

Examples

{
    let intr_lock = my_cpu().intr_lock.lock();
    // From this point, interrupt is disabled on this hart.
    // And whether interrupt is enabled before is recorded in the lock.
    let intr_lock2 = my_cpu().intr_lock.lock();
    // No effect.
}
// As all `intr_lock`s are dropped, interrupt may recover to previous
// status.

Fields

is_enabled_before: bool

cnt: UnsafeCell<isize>

hart_id: usize

Implementations

impl IntrLock

pub const fn new() -> Self

pub fn lock(&mut self) -> IntrLockGuard