89 lines
2.2 KiB
Rust
89 lines
2.2 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 std::convert::*;
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use ipc::IpcConfig;
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use util::bytes::{FromRawBytes, BytesConvertable, FromBytesError};
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pub struct Service {
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pub commits: RwLock<usize>,
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pub rollbacks: RwLock<usize>,
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}
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pub struct CustomData {
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pub a: usize,
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pub b: usize,
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}
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impl FromRawBytes for CustomData {
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fn from_bytes(bytes: &[u8]) -> Result<CustomData, FromBytesError> {
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Ok(CustomData {
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a: bytes[0] as usize * 256 + bytes[1] as usize,
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b: bytes[2] as usize * 256 + bytes[3] as usize
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})
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}
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}
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impl BytesConvertable for CustomData {
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fn bytes(&self) -> &[u8] {
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let ip: *const CustomData = self;
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let ptr: *const u8 = ip as *const _;
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unsafe {
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::std::slice::from_raw_parts(
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ptr,
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::std::mem::size_of::<CustomData>()
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)
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}
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}
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}
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#[derive(Ipc)]
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impl Service {
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fn commit(&self, f: u32) -> u32 {
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let mut lock = self.commits.write().unwrap();
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*lock = *lock + f as usize;
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f
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}
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pub fn rollback(&self, a: Option<u32>, b: u32) -> i32 {
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let a_0 = a.unwrap_or_else(|| 0);
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let mut lock = self.rollbacks.write().unwrap();
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*lock = *lock + a_0 as usize - b as usize;
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(a_0 - b) as i32
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}
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pub fn push_custom(&self, data: CustomData) -> bool {
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let mut clock = self.commits.write().unwrap();
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let mut rlock = self.commits.write().unwrap();
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*clock = data.a;
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*rlock = data.b;
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true
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}
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}
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impl Service {
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pub fn new() -> Service {
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Service {
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commits: RwLock::new(0usize),
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rollbacks: RwLock::new(0usize),
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}
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}
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}
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impl ::ipc::IpcConfig for Service {}
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