// Copyright 2015, 2016 Ethcore (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/>. use std::sync::RwLock; use std::ops::*; use ipc::IpcConfig; use ipc::BinaryConvertable; use std::mem; use ipc::binary::BinaryConvertError; use std::collections::VecDeque; pub struct DB<L: Sized> { pub writes: RwLock<u64>, pub reads: RwLock<u64>, pub holdings: L, } pub trait DBWriter { fn write(&self, data: Vec<u8>) -> Result<(), DBError>; } impl<L: Sized> IpcConfig for DB<L> {} #[derive(Binary)] pub enum DBError { Write, Read } #[derive(Ipc)] impl<L: Sized> DBWriter for DB<L> { fn write(&self, data: Vec<u8>) -> Result<(), DBError> { let mut writes = self.writes.write().unwrap(); *writes = *writes + data.len() as u64; Ok(()) } }