openethereum/util/stop-guard/src/lib.rs

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// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Stop guard mod
use std::sync::Arc;
use std::sync::atomic::*;
/// Stop guard that will set a stop flag on drop
pub struct StopGuard {
flag: Arc<AtomicBool>,
}
impl StopGuard {
/// Create a stop guard
pub fn new() -> StopGuard {
StopGuard {
flag: Arc::new(AtomicBool::new(false))
}
}
/// Share stop guard between the threads
pub fn share(&self) -> Arc<AtomicBool> {
self.flag.clone()
}
}
impl Drop for StopGuard {
fn drop(&mut self) {
self.flag.store(true, Ordering::Relaxed)
}
}