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denoland-deno/cli/tokio_util.rs
2020-08-31 17:38:25 -04:00

25 lines
782 B
Rust

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
pub fn create_basic_runtime() -> tokio::runtime::Runtime {
tokio::runtime::Builder::new()
.basic_scheduler()
.enable_io()
.enable_time()
// This limits the number of threads for blocking operations (like for
// synchronous fs ops) or CPU bound tasks like when we run dprint in
// parallel for deno fmt.
// The default value is 512, which is an unhelpfully large thread pool. We
// don't ever want to have more than a couple dozen threads.
.max_threads(32)
.build()
.unwrap()
}
// TODO(ry) rename to run_local ?
pub fn run_basic<F, R>(future: F) -> R
where
F: std::future::Future<Output = R>,
{
let mut rt = create_basic_runtime();
rt.block_on(future)
}