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// This file is part of dpdk. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/dpdk/master/COPYRIGHT. No part of dpdk, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2016-2018 The developers of dpdk. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/dpdk/master/COPYRIGHT.
/// A wrapper type for logical core functions which:-
///
/// * catches panics and causes termination.
/// * busy polls (loops) with a CPU pause.
///
/// It re-uses the definition of `ServiceFunction` for the body of the busy poll loop.
#[derive(Debug)]
pub struct BusyPollingLogicalCoreFunction<B: BusyPollBehaviour>
{
busy_poll_behaviour: B,
should_function_terminate: Arc<ShouldFunctionTerminate>,
}
impl<B: BusyPollBehaviour> SlaveLogicalCoreFunction for BusyPollingLogicalCoreFunction<B>
{
#[inline(always)]
fn execute(&mut self)
{
let success_or_failure = catch_unwind(AssertUnwindSafe(||
{
self.busy_poll_behaviour.start();
while self.should_function_terminate.should_continue()
{
self.busy_poll_behaviour.execute();
spin_loop_hint()
}
self.busy_poll_behaviour.finish();
}));
if let Err(panicked_with) = success_or_failure
{
self.should_function_terminate.we_panicked(panicked_with.as_ref())
}
}
}
impl<B: BusyPollBehaviour> BusyPollingLogicalCoreFunction<B>
{
/// Creates a new instance.
#[inline(always)]
pub fn new(busy_poll_behaviour: B, should_function_terminate: &Arc<ShouldFunctionTerminate>) -> Self
{
Self
{
busy_poll_behaviour,
should_function_terminate: should_function_terminate.clone(),
}
}
}