Function check_signals

crates/vm/src/signal.rs:43–59

(vm: &VirtualMachine)

#[cfg_attr(feature = "flame-it", flame)]
#[inline(always)]
pub fn check_signals(vm: &VirtualMachine) -> PyResult<()> {
    if vm.signal_handlers.get().is_none() {
        return Ok(());
    }

    // Read-only check first: avoids cache-line invalidation on every
    // instruction when no signal is pending (the common case).
    if !ANY_TRIGGERED.load(Ordering::Relaxed) {
        return Ok(());
    }
    // Atomic RMW only when a signal is actually pending.
    if !ANY_TRIGGERED.swap(false, Ordering::Acquire) {
        return Ok(());
    }

    trigger_signals(vm)
}

#[inline(never)]
#[cold]