62 lines
1.7 KiB
Rust
62 lines
1.7 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity 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 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. If not, see <http://www.gnu.org/licenses/>.
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use std::sync::RwLock;
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use std::ops::*;
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use ipc::IpcConfig;
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use ipc::BinaryConvertable;
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use std::mem;
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use ipc::binary::BinaryConvertError;
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use std::collections::VecDeque;
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pub struct DB<L: Sized> {
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pub writes: RwLock<u64>,
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pub reads: RwLock<u64>,
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pub holdings: L,
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}
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pub trait DBWriter {
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fn write(&self, data: Vec<u8>) -> Result<(), DBError>;
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fn write_slice(&self, data: &[u8]) -> Result<(), DBError>;
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}
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impl IpcConfig<DBWriter> for ::std::sync::Arc<DBWriter> {}
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#[derive(Binary)]
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pub enum DBError { Write, Read }
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#[derive(Ipc)]
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impl<L: Sized> DBWriter for DB<L> {
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fn write(&self, data: Vec<u8>) -> Result<(), DBError> {
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let mut writes = self.writes.write().unwrap();
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*writes = *writes + data.len() as u64;
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Ok(())
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}
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fn write_slice(&self, data: &[u8]) -> Result<(), DBError> {
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let mut writes = self.writes.write().unwrap();
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*writes = *writes + data.len() as u64;
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Ok(())
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}
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}
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#[derive(Ipc)]
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trait DBNotify {
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fn notify(&self, a: u64, b: u64) -> bool;
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}
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impl IpcConfig<DBNotify> for ::std::sync::Arc<DBNotify> { }
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