78 lines
2.2 KiB
Rust
78 lines
2.2 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity Ethereum.
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// Parity Ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity Ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
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use std::sync::Weak;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::time::Duration;
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use std::thread;
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use std::sync::Arc;
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use engines::Engine;
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use machine::Machine;
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/// Service that is managing the engine
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pub struct StepService {
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shutdown: Arc<AtomicBool>,
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thread: Option<thread::JoinHandle<()>>,
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}
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impl StepService {
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/// Start the `StepService`
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pub fn start<M: Machine + 'static>(engine: Weak<Engine<M>>) -> Arc<Self> {
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let shutdown = Arc::new(AtomicBool::new(false));
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let s = shutdown.clone();
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let thread = thread::Builder::new()
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.name("CliqueStepService".into())
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.spawn(move || {
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// startup delay.
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thread::sleep(Duration::from_secs(5));
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loop {
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// see if we are in shutdown.
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if shutdown.load(Ordering::Acquire) {
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trace!(target: "miner", "CliqueStepService: received shutdown signal!");
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break;
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}
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trace!(target: "miner", "CliqueStepService: triggering sealing");
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// Try sealing
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engine.upgrade().map(|x| x.step());
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// Yield
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thread::sleep(Duration::from_millis(2000));
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}
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trace!(target: "miner", "CliqueStepService: shutdown.");
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}).expect("CliqueStepService thread failed");
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Arc::new(StepService {
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shutdown: s,
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thread: Some(thread),
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})
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}
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/// Stop the `StepService`
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pub fn stop(&mut self) {
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trace!(target: "miner", "CliqueStepService: shutting down.");
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self.shutdown.store(true, Ordering::Release);
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if let Some(t) = self.thread.take() {
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t.join().expect("CliqueStepService thread panicked!");
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}
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}
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}
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