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pezkuwi-subxt/substrate/primitives/core/src/tasks.rs
T
Ashley 234e7d0c3d Simplify a few chain components creation APIs related to the service (#6611)
* Simplify a few chain components creation APIs related to the service

* Fix basic-authorship doc tests

* Remove DefaultQueue

* Update client/service/src/builder.rs

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>

* Move ExecutionExtensions comment around

* Remove unused BlakeTwo256

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>
2020-07-09 15:43:04 +02:00

58 lines
1.5 KiB
Rust

// This file is part of Substrate.
// Copyright (C) 2020 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//! Module for low-level asynchronous processing.
use crate::traits::CloneableSpawn;
use futures::{executor, task};
/// Simple task executor.
///
/// Uses single thread for scheduling tasks. Can be cloned and used in
/// runtime host (implements `CloneableSpawn`).
#[derive(Debug, Clone)]
pub struct Executor {
pool: executor::ThreadPool,
}
impl Executor {
fn new() -> Self {
Self {
pool: executor::ThreadPool::builder().pool_size(1).create()
.expect("Failed to create task executor")
}
}
}
impl task::Spawn for Executor {
fn spawn_obj(&self, future: task::FutureObj<'static, ()>)
-> Result<(), task::SpawnError> {
self.pool.spawn_obj(future)
}
}
impl CloneableSpawn for Executor {
fn clone(&self) -> Box<dyn CloneableSpawn> {
Box::new(Clone::clone(self))
}
}
/// Create tasks executor.
pub fn executor() -> Box<dyn CloneableSpawn> {
Box::new(Executor::new())
}