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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/>.

    //! Network Statistics
    use std::sync::atomic::*;

    /// Network statistics structure
    #[derive(Default, Debug)]
    pub struct NetworkStats {
    	/// Bytes received
    	recv: AtomicUsize,
    	/// Bytes sent
    	send: AtomicUsize,
    	/// Total number of sessions created
    	sessions: AtomicUsize,
    }

    impl NetworkStats {
    	/// Increase bytes received.
    	#[inline]
    	pub fn inc_recv(&self, size: usize) {
    		self.recv.fetch_add(size, Ordering::Relaxed);
    	}

    	/// Increase bytes sent.
    	#[inline]
    	pub fn inc_send(&self, size: usize) {
    		self.send.fetch_add(size, Ordering::Relaxed);
    	}

    	/// Increase number of sessions.
    	#[inline]
    	pub fn inc_sessions(&self) {
    		self.sessions.fetch_add(1, Ordering::Relaxed);
    	}

    	/// Get bytes sent.
    	#[inline]
    	pub fn send(&self) -> usize {
    		self.send.load(Ordering::Relaxed)
    	}

    	/// Get bytes received.
    	#[inline]
    	pub fn recv(&self) -> usize {
    		self.recv.load(Ordering::Relaxed)
    	}

    	/// Get total number of sessions created.
    	#[inline]
    	pub fn sessions(&self) -> usize {
    		self.sessions.load(Ordering::Relaxed)
    	}

    	/// Create a new empty instance.
    	pub fn new() -> NetworkStats {
    		NetworkStats {
    			recv: AtomicUsize::new(0),
    			send: AtomicUsize::new(0),
    			sessions: AtomicUsize::new(0),
    		}
    	}
    }

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