Add corex library with resource-aware execution primitives
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- Implement CI workflow for formatting, linting, testing, and documentation checks. - Create publish workflow for automated publishing to crates.io. - Add .gitignore to exclude build artifacts and editor files. - Define Cargo.toml for corex and corex-core with dependencies and metadata. - Add README.md files for corex and corex-core with usage instructions and licensing. - Implement core execution primitives: spawn_io, compute, and spawn_bg with panic isolation. - Establish global engine context for resource management based on logical CPU cores. - Introduce error handling for compute panics.
This commit is contained in:
asepharyana
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name: CI
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on:
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push:
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branches: [main]
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pull_request:
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branches: [main]
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env:
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CARGO_TERM_COLOR: always
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jobs:
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fmt:
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name: Rustfmt
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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with:
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components: rustfmt
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- run: cargo fmt --all --check
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clippy:
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name: Clippy
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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with:
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components: clippy
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- name: Clippy (all features)
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run: cargo clippy --workspace --all-features -- -D warnings
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- name: Clippy (no default features)
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run: cargo clippy --workspace --no-default-features -- -D warnings
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test-matrix:
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name: Test (${{ matrix.name }})
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runs-on: ubuntu-latest
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strategy:
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fail-fast: false
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matrix:
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include:
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- name: default features
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flags: ""
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- name: all features
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flags: "--all-features"
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- name: io only
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flags: "--no-default-features --features io"
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- name: compute only
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flags: "--no-default-features --features compute"
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- name: bg only
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flags: "--no-default-features --features bg"
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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||||||
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- name: Build
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run: cargo build --workspace ${{ matrix.flags }}
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- name: Test
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||||||
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run: cargo test --workspace ${{ matrix.flags }}
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||||||
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example:
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name: Run example
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||||||
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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- run: cargo run --example main --features full
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docs:
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name: Docs check
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||||||
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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||||||
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- run: RUSTDOCFLAGS="-D warnings" cargo doc --workspace --all-features --no-deps
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package:
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name: Cargo package dry-run
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runs-on: ubuntu-latest
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steps:
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|
- uses: actions/checkout@v4
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||||||
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- uses: dtolnay/rust-toolchain@stable
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||||||
|
- name: Package corex-core
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||||||
|
run: cargo package -p corex-core --no-verify
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||||||
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- name: Package corex
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||||||
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run: cargo package -p corex --no-verify
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||||||
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name: Publish to crates.io
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||||||
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on:
|
||||||
|
push:
|
||||||
|
tags: ["v*.*.*"]
|
||||||
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|
||||||
|
jobs:
|
||||||
|
publish:
|
||||||
|
name: Publish
|
||||||
|
runs-on: ubuntu-latest
|
||||||
|
steps:
|
||||||
|
- uses: actions/checkout@v4
|
||||||
|
- uses: dtolnay/rust-toolchain@stable
|
||||||
|
- name: Publish corex-core
|
||||||
|
run: cargo publish -p corex-core --allow-dirty --no-verify
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||||||
|
env:
|
||||||
|
CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
|
||||||
|
- name: Wait for crates.io indexing
|
||||||
|
run: sleep 30
|
||||||
|
- name: Publish corex
|
||||||
|
run: cargo publish -p corex --allow-dirty --no-verify
|
||||||
|
env:
|
||||||
|
CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
|
||||||
+15
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|||||||
|
# Cargo build artifacts
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||||||
|
/target
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||||||
|
/crates/*/target
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||||||
|
|
||||||
|
# corex is a library workspace: the lockfile is not committed, per Rust's
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||||||
|
# convention for libraries (binaries/applications should commit theirs).
|
||||||
|
# Cargo regenerates it locally and in CI on every build.
|
||||||
|
Cargo.lock
|
||||||
|
|
||||||
|
# Editor / OS noise
|
||||||
|
.DS_Store
|
||||||
|
Thumbs.db
|
||||||
|
*.swp
|
||||||
|
.idea/
|
||||||
|
.vscode/
|
||||||
+62
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|
|||||||
|
[workspace]
|
||||||
|
resolver = "2"
|
||||||
|
members = ["crates/corex-core"]
|
||||||
|
|
||||||
|
[workspace.package]
|
||||||
|
version = "0.1.0"
|
||||||
|
edition = "2021"
|
||||||
|
rust-version = "1.75"
|
||||||
|
license = "MIT OR Apache-2.0"
|
||||||
|
repository = "https://github.com/username/corex"
|
||||||
|
homepage = "https://github.com/username/corex"
|
||||||
|
documentation = "https://docs.rs/corex"
|
||||||
|
authors = ["The corex Authors"]
|
||||||
|
|
||||||
|
[workspace.dependencies]
|
||||||
|
tokio = { version = "1.53", features = ["full"] }
|
||||||
|
rayon = "1.12"
|
||||||
|
num_cpus = "1.17"
|
||||||
|
tracing = "0.1"
|
||||||
|
corex-core = { path = "crates/corex-core", version = "0.1.0", default-features = false }
|
||||||
|
|
||||||
|
[package]
|
||||||
|
name = "corex"
|
||||||
|
version.workspace = true
|
||||||
|
edition.workspace = true
|
||||||
|
rust-version.workspace = true
|
||||||
|
license.workspace = true
|
||||||
|
repository.workspace = true
|
||||||
|
homepage.workspace = true
|
||||||
|
documentation.workspace = true
|
||||||
|
authors.workspace = true
|
||||||
|
description = "Resource-aware abstractions for async I/O, heavy compute, and background queue management."
|
||||||
|
readme = "README.md"
|
||||||
|
keywords = ["async", "concurrency", "rayon", "tokio", "resource-management"]
|
||||||
|
categories = ["asynchronous", "concurrency", "rust-patterns"]
|
||||||
|
|
||||||
|
[lib]
|
||||||
|
name = "corex"
|
||||||
|
path = "src/lib.rs"
|
||||||
|
|
||||||
|
[features]
|
||||||
|
default = []
|
||||||
|
io = ["corex-core/io"]
|
||||||
|
compute = ["corex-core/compute"]
|
||||||
|
bg = ["corex-core/bg"]
|
||||||
|
full = ["io", "compute", "bg"]
|
||||||
|
|
||||||
|
[dependencies]
|
||||||
|
corex-core = { workspace = true }
|
||||||
|
|
||||||
|
[dev-dependencies]
|
||||||
|
tokio = { workspace = true }
|
||||||
|
tracing-subscriber = "0.3"
|
||||||
|
|
||||||
|
[[example]]
|
||||||
|
name = "main"
|
||||||
|
path = "examples/main.rs"
|
||||||
|
required-features = ["full"]
|
||||||
|
|
||||||
|
[package.metadata.docs.rs]
|
||||||
|
all-features = true
|
||||||
|
rustdoc-args = ["--cfg", "docsrs"]
|
||||||
+201
@@ -0,0 +1,201 @@
|
|||||||
|
Apache License
|
||||||
|
Version 2.0, January 2004
|
||||||
|
http://www.apache.org/licenses/
|
||||||
|
|
||||||
|
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||||||
|
or other liability obligations and/or rights consistent with this
|
||||||
|
License. However, in accepting such obligations, You may act only
|
||||||
|
on Your own behalf and on Your sole responsibility, not on behalf
|
||||||
|
of any other Contributor, and only if You agree to indemnify,
|
||||||
|
defend, and hold each Contributor harmless for any liability
|
||||||
|
incurred by, or claims asserted against, such Contributor by reason
|
||||||
|
of your accepting any such warranty or additional liability.
|
||||||
|
|
||||||
|
END OF TERMS AND CONDITIONS
|
||||||
|
|
||||||
|
APPENDIX: How to apply the Apache License to your work.
|
||||||
|
|
||||||
|
To apply the Apache License to your work, attach the following
|
||||||
|
boilerplate notice, with the fields enclosed by brackets "[]"
|
||||||
|
replaced with your own identifying information. (Don't include
|
||||||
|
the brackets!) The text should be enclosed in the appropriate
|
||||||
|
comment syntax for the file format. We also recommend that a
|
||||||
|
file or class name and description of purpose be included on the
|
||||||
|
same "printed page" as the copyright notice for easier
|
||||||
|
identification within third-party archives.
|
||||||
|
|
||||||
|
Copyright 2026 The corex Authors
|
||||||
|
|
||||||
|
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.
|
||||||
+21
@@ -0,0 +1,21 @@
|
|||||||
|
MIT License
|
||||||
|
|
||||||
|
Copyright (c) 2026 The corex Authors
|
||||||
|
|
||||||
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||||
|
of this software and associated documentation files (the "Software"), to deal
|
||||||
|
in the Software without restriction, including without limitation the rights
|
||||||
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||||
|
copies of the Software, and to permit persons to whom the Software is
|
||||||
|
furnished to do so, subject to the following conditions:
|
||||||
|
|
||||||
|
The above copyright notice and this permission notice shall be included in all
|
||||||
|
copies or substantial portions of the Software.
|
||||||
|
|
||||||
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||||
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||||
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||||
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||||
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||||
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||||
|
SOFTWARE.
|
||||||
@@ -0,0 +1,81 @@
|
|||||||
|
# corex
|
||||||
|
|
||||||
|
[](https://crates.io/crates/corex)
|
||||||
|
[](https://docs.rs/corex)
|
||||||
|
[](LICENSE-MIT)
|
||||||
|
|
||||||
|
Resource-aware execution primitives for Rust: async I/O, heavy compute, and background queue management, sized automatically from the host's logical core count and exposed through a single, lazily-initialized engine context.
|
||||||
|
|
||||||
|
## Resource Sizing
|
||||||
|
|
||||||
|
Given $N$ logical cores (via `num_cpus::get()`):
|
||||||
|
|
||||||
|
| Subsystem | Sizing Formula | Default on 8 cores | Backing Primitive |
|
||||||
|
| :--- | :--- | :--- | :--- |
|
||||||
|
| **Async I/O** | $N$ | 8 | Ambient `tokio::spawn` + `tracing` span |
|
||||||
|
| **Compute** | $\max(1, N - 1)$ | 7 | Sized `rayon::ThreadPool` + `catch_unwind` |
|
||||||
|
| **Background Queue** | $\max(2, \lfloor N / 2 \rfloor)$ | 4 | `tokio::sync::Semaphore` + `tokio::spawn` |
|
||||||
|
|
||||||
|
## Features
|
||||||
|
|
||||||
|
- **`io`**: enables `corex::spawn_io`, instrumented async task spawning.
|
||||||
|
- **`compute`**: enables `corex::compute`, panic-isolated execution on a sized Rayon pool.
|
||||||
|
- **`bg`**: enables `corex::spawn_bg`, semaphore-bounded background tasks.
|
||||||
|
- **`full`**: enables all three subsystems.
|
||||||
|
|
||||||
|
Zero features enabled by default (`default = []`), so you only pull in the dependencies your application actually uses.
|
||||||
|
|
||||||
|
## Quick Start
|
||||||
|
|
||||||
|
Add to your `Cargo.toml`:
|
||||||
|
|
||||||
|
```toml
|
||||||
|
[dependencies]
|
||||||
|
corex = { version = "0.1", features = ["full"] }
|
||||||
|
```
|
||||||
|
|
||||||
|
Use the entry points directly:
|
||||||
|
|
||||||
|
```rust
|
||||||
|
#[tokio::main]
|
||||||
|
async fn main() {
|
||||||
|
// Optional explicit bootstrap: logs or validates resource sizing upfront.
|
||||||
|
// Omit it and the first call to any primitive below will initialize it lazily.
|
||||||
|
let ctx = corex::init();
|
||||||
|
println!(
|
||||||
|
"io_threads={} compute_threads={} bg_concurrency={}",
|
||||||
|
ctx.io_threads, ctx.compute_threads, ctx.bg_concurrency
|
||||||
|
);
|
||||||
|
|
||||||
|
// 1. Async I/O (instrumented with tracing)
|
||||||
|
let io = corex::spawn_io(async {
|
||||||
|
// ... network / disk work ...
|
||||||
|
42
|
||||||
|
});
|
||||||
|
|
||||||
|
// 2. Heavy Compute (isolated from worker panics)
|
||||||
|
let sum = corex::compute(|| (1..=1_000_000u64).sum::<u64>())?;
|
||||||
|
|
||||||
|
// 3. Background Queue (concurrency-bounded)
|
||||||
|
let bg = corex::spawn_bg(async {
|
||||||
|
// ... deferred cleanup / telemetry ...
|
||||||
|
}).await;
|
||||||
|
|
||||||
|
let _ = (io.await, bg.await);
|
||||||
|
}
|
||||||
|
```
|
||||||
|
|
||||||
|
## Running the Example
|
||||||
|
|
||||||
|
```bash
|
||||||
|
cargo run --example main --features full
|
||||||
|
```
|
||||||
|
|
||||||
|
## License
|
||||||
|
|
||||||
|
Licensed under either of:
|
||||||
|
|
||||||
|
- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or <http://www.apache.org/licenses/LICENSE-2.0>)
|
||||||
|
- MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>)
|
||||||
|
|
||||||
|
at your option.
|
||||||
@@ -0,0 +1,31 @@
|
|||||||
|
[package]
|
||||||
|
name = "corex-core"
|
||||||
|
version.workspace = true
|
||||||
|
edition.workspace = true
|
||||||
|
rust-version.workspace = true
|
||||||
|
license.workspace = true
|
||||||
|
repository.workspace = true
|
||||||
|
homepage.workspace = true
|
||||||
|
documentation.workspace = true
|
||||||
|
authors.workspace = true
|
||||||
|
description = "Core allocation logic and execution primitives for corex."
|
||||||
|
readme = "README.md"
|
||||||
|
keywords = ["async", "concurrency", "rayon", "tokio", "resource-management"]
|
||||||
|
categories = ["asynchronous", "concurrency", "rust-patterns"]
|
||||||
|
|
||||||
|
[features]
|
||||||
|
default = []
|
||||||
|
io = ["dep:tokio"]
|
||||||
|
compute = ["dep:rayon"]
|
||||||
|
bg = ["dep:tokio"]
|
||||||
|
full = ["io", "compute", "bg"]
|
||||||
|
|
||||||
|
[dependencies]
|
||||||
|
tokio = { workspace = true, optional = true }
|
||||||
|
rayon = { workspace = true, optional = true }
|
||||||
|
num_cpus = { workspace = true }
|
||||||
|
tracing = { workspace = true }
|
||||||
|
|
||||||
|
[package.metadata.docs.rs]
|
||||||
|
all-features = true
|
||||||
|
rustdoc-args = ["--cfg", "docsrs"]
|
||||||
@@ -0,0 +1,9 @@
|
|||||||
|
# corex-core
|
||||||
|
|
||||||
|
Core allocation logic, global context initialization, and execution primitives for [`corex`](https://crates.io/crates/corex).
|
||||||
|
|
||||||
|
Applications should depend on the `corex` facade crate rather than this crate directly.
|
||||||
|
|
||||||
|
## License
|
||||||
|
|
||||||
|
Licensed under either of Apache License, Version 2.0 or MIT license at your option.
|
||||||
@@ -0,0 +1,53 @@
|
|||||||
|
//! Bounded-concurrency background task execution.
|
||||||
|
|
||||||
|
use tracing::Instrument;
|
||||||
|
|
||||||
|
use crate::context::context;
|
||||||
|
|
||||||
|
/// Spawns `future` as a background task once a concurrency permit is
|
||||||
|
/// available, returning its [`tokio::task::JoinHandle`].
|
||||||
|
///
|
||||||
|
/// At most [`crate::context::EngineContext::bg_concurrency`] background
|
||||||
|
/// tasks run at any one time; awaiting `spawn_bg` blocks the caller until a
|
||||||
|
/// slot frees up, which is what provides the bound. A task's permit is held
|
||||||
|
/// for the task's full lifetime and released automatically when it
|
||||||
|
/// completes.
|
||||||
|
///
|
||||||
|
/// Panic isolation is provided by Tokio itself: a panicking background task
|
||||||
|
/// cannot crash the runtime or any sibling task, and is surfaced to the
|
||||||
|
/// caller as `Err(JoinError)` when the returned handle is awaited, exactly
|
||||||
|
/// as with [`crate::io::spawn_io`].
|
||||||
|
///
|
||||||
|
/// # Panics
|
||||||
|
///
|
||||||
|
/// Panics if called outside the context of a running Tokio runtime.
|
||||||
|
pub async fn spawn_bg<F>(future: F) -> tokio::task::JoinHandle<F::Output>
|
||||||
|
where
|
||||||
|
F: std::future::Future + Send + 'static,
|
||||||
|
F::Output: Send + 'static,
|
||||||
|
{
|
||||||
|
let permit = context()
|
||||||
|
.bg_semaphore
|
||||||
|
.acquire()
|
||||||
|
.await
|
||||||
|
.expect("corex: bg semaphore closed unexpectedly");
|
||||||
|
let span = tracing::info_span!("corex_bg_task");
|
||||||
|
tokio::spawn(
|
||||||
|
async move {
|
||||||
|
let _permit = permit;
|
||||||
|
future.await
|
||||||
|
}
|
||||||
|
.instrument(span),
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use super::*;
|
||||||
|
|
||||||
|
#[tokio::test]
|
||||||
|
async fn spawn_bg_roundtrips_a_value() {
|
||||||
|
let handle = spawn_bg(async { 9u32 }).await;
|
||||||
|
assert_eq!(handle.await.unwrap(), 9);
|
||||||
|
}
|
||||||
|
}
|
||||||
@@ -0,0 +1,60 @@
|
|||||||
|
//! Panic-isolated heavy compute on a sized [`rayon::ThreadPool`].
|
||||||
|
|
||||||
|
use std::panic::{catch_unwind, AssertUnwindSafe};
|
||||||
|
|
||||||
|
use crate::context::context;
|
||||||
|
use crate::error::CorexError;
|
||||||
|
|
||||||
|
/// Runs `f` on the global compute thread pool and returns its result.
|
||||||
|
///
|
||||||
|
/// If `f` panics, the panic is caught and converted into
|
||||||
|
/// [`CorexError::ComputePanic`] instead of unwinding across the pool
|
||||||
|
/// boundary or poisoning the pool; subsequent calls to [`compute`] continue
|
||||||
|
/// to work normally.
|
||||||
|
///
|
||||||
|
/// # Panic-safety caveat
|
||||||
|
///
|
||||||
|
/// `f` is wrapped in [`AssertUnwindSafe`] so that closures capturing
|
||||||
|
/// ordinary references or non-[`UnwindSafe`](std::panic::UnwindSafe) state
|
||||||
|
/// can be submitted without a compile error. This is sound with respect to
|
||||||
|
/// the compute pool itself, since a panicking closure's stack (and any
|
||||||
|
/// locals it holds) is discarded entirely rather than observed afterward.
|
||||||
|
/// It does not, however, guarantee exception-safety of state the closure
|
||||||
|
/// captured by mutable reference: if `f` panics partway through mutating a
|
||||||
|
/// captured `&mut T`, that `T` may be left in an inconsistent state from
|
||||||
|
/// the caller's perspective.
|
||||||
|
pub fn compute<F, R>(f: F) -> Result<R, CorexError>
|
||||||
|
where
|
||||||
|
F: FnOnce() -> R + Send,
|
||||||
|
R: Send,
|
||||||
|
{
|
||||||
|
let wrapped = AssertUnwindSafe(f);
|
||||||
|
context()
|
||||||
|
.compute_pool
|
||||||
|
.install(move || catch_unwind(wrapped))
|
||||||
|
.map_err(|payload| CorexError::ComputePanic(panic_payload_to_string(payload)))
|
||||||
|
}
|
||||||
|
|
||||||
|
fn panic_payload_to_string(payload: Box<dyn std::any::Any + Send>) -> String {
|
||||||
|
if let Some(message) = payload.downcast_ref::<&str>() {
|
||||||
|
(*message).to_string()
|
||||||
|
} else if let Some(message) = payload.downcast_ref::<String>() {
|
||||||
|
message.clone()
|
||||||
|
} else {
|
||||||
|
"compute closure panicked with a non-string payload".to_string()
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use super::*;
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn compute_panic_is_isolated_and_pool_survives() {
|
||||||
|
let panicked: Result<u32, CorexError> = compute(|| panic!("boom"));
|
||||||
|
assert!(matches!(panicked, Err(CorexError::ComputePanic(_))));
|
||||||
|
|
||||||
|
let recovered = compute(|| 1 + 1);
|
||||||
|
assert_eq!(recovered.unwrap(), 2);
|
||||||
|
}
|
||||||
|
}
|
||||||
@@ -0,0 +1,98 @@
|
|||||||
|
//! Global engine context providing resource-aware execution primitives.
|
||||||
|
//!
|
||||||
|
//! The context is initialized lazily on first access via [`context`], or
|
||||||
|
//! explicitly via [`init`]. Resource sizing is derived from the number of
|
||||||
|
//! logical CPU cores reported by [`num_cpus::get`].
|
||||||
|
|
||||||
|
use std::sync::OnceLock;
|
||||||
|
|
||||||
|
static CONTEXT: OnceLock<EngineContext> = OnceLock::new();
|
||||||
|
|
||||||
|
/// The global, lazily-initialized engine context.
|
||||||
|
///
|
||||||
|
/// Holds the computed thread and concurrency counts for each corex
|
||||||
|
/// subsystem, along with the resource pools those counts were used to
|
||||||
|
/// build. The context lives for the lifetime of the process once
|
||||||
|
/// initialized: it is stored in a `'static` [`OnceLock`] and is never
|
||||||
|
/// dropped.
|
||||||
|
pub struct EngineContext {
|
||||||
|
/// Logical CPU core count used for sizing async I/O scheduling.
|
||||||
|
pub io_threads: usize,
|
||||||
|
/// Number of worker threads allocated to the compute [`rayon::ThreadPool`].
|
||||||
|
pub compute_threads: usize,
|
||||||
|
/// Maximum number of background tasks permitted to run concurrently.
|
||||||
|
pub bg_concurrency: usize,
|
||||||
|
#[cfg(feature = "compute")]
|
||||||
|
pub(crate) compute_pool: rayon::ThreadPool,
|
||||||
|
#[cfg(feature = "bg")]
|
||||||
|
pub(crate) bg_semaphore: tokio::sync::Semaphore,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl EngineContext {
|
||||||
|
/// Builds a new [`EngineContext`] sized from the current machine's
|
||||||
|
/// logical core count.
|
||||||
|
///
|
||||||
|
/// # Panics
|
||||||
|
///
|
||||||
|
/// Panics if the compute thread pool cannot be constructed. This only
|
||||||
|
/// happens under an unrecoverable environment failure, such as the
|
||||||
|
/// operating system refusing to spawn any new thread.
|
||||||
|
fn build() -> Self {
|
||||||
|
let logical_cores = num_cpus::get();
|
||||||
|
let io_threads = logical_cores;
|
||||||
|
let compute_threads = logical_cores.saturating_sub(1).max(1);
|
||||||
|
let bg_concurrency = (logical_cores / 2).max(2);
|
||||||
|
|
||||||
|
#[cfg(feature = "compute")]
|
||||||
|
let compute_pool = rayon::ThreadPoolBuilder::new()
|
||||||
|
.num_threads(compute_threads)
|
||||||
|
.thread_name(|index| format!("corex-compute-{index}"))
|
||||||
|
.build()
|
||||||
|
.expect("corex: failed to build rayon compute thread pool");
|
||||||
|
|
||||||
|
#[cfg(feature = "bg")]
|
||||||
|
let bg_semaphore = tokio::sync::Semaphore::new(bg_concurrency);
|
||||||
|
|
||||||
|
Self {
|
||||||
|
io_threads,
|
||||||
|
compute_threads,
|
||||||
|
bg_concurrency,
|
||||||
|
#[cfg(feature = "compute")]
|
||||||
|
compute_pool,
|
||||||
|
#[cfg(feature = "bg")]
|
||||||
|
bg_semaphore,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Returns the global [`EngineContext`], initializing it on first access.
|
||||||
|
///
|
||||||
|
/// Safe to call from any thread at any time; initialization happens
|
||||||
|
/// exactly once regardless of how many callers race to trigger it.
|
||||||
|
pub fn context() -> &'static EngineContext {
|
||||||
|
CONTEXT.get_or_init(EngineContext::build)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Bootstraps the global [`EngineContext`].
|
||||||
|
///
|
||||||
|
/// Behaviorally identical to [`context`]; provided as the explicit,
|
||||||
|
/// discoverable entry point applications call at startup to force
|
||||||
|
/// initialization eagerly, for example so resource sizing can be logged
|
||||||
|
/// before any workload runs. Calling it more than once, or never calling
|
||||||
|
/// it at all before using [`context`], is equally correct.
|
||||||
|
pub fn init() -> &'static EngineContext {
|
||||||
|
CONTEXT.get_or_init(EngineContext::build)
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use super::*;
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn context_numbers_are_sane() {
|
||||||
|
let ctx = context();
|
||||||
|
assert!(ctx.io_threads >= 1);
|
||||||
|
assert!(ctx.compute_threads >= 1);
|
||||||
|
assert!(ctx.bg_concurrency >= 2);
|
||||||
|
}
|
||||||
|
}
|
||||||
@@ -0,0 +1,28 @@
|
|||||||
|
//! Shared error type for corex execution primitives.
|
||||||
|
|
||||||
|
/// Errors surfaced by corex's panic-isolated execution primitives.
|
||||||
|
///
|
||||||
|
/// Marked `#[non_exhaustive]` so new variants can be added without a
|
||||||
|
/// breaking change; downstream `match` expressions should include a
|
||||||
|
/// wildcard arm.
|
||||||
|
#[non_exhaustive]
|
||||||
|
#[derive(Debug)]
|
||||||
|
pub enum CorexError {
|
||||||
|
/// A closure submitted to [`crate::compute::compute`] panicked.
|
||||||
|
///
|
||||||
|
/// The contained string is a best-effort rendering of the panic
|
||||||
|
/// payload; the compute thread pool itself remains usable afterward.
|
||||||
|
ComputePanic(String),
|
||||||
|
}
|
||||||
|
|
||||||
|
impl std::fmt::Display for CorexError {
|
||||||
|
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||||||
|
match self {
|
||||||
|
Self::ComputePanic(message) => {
|
||||||
|
write!(f, "compute closure panicked: {message}")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl std::error::Error for CorexError {}
|
||||||
@@ -0,0 +1,31 @@
|
|||||||
|
//! Async I/O task spawning, instrumented with [`tracing`].
|
||||||
|
|
||||||
|
use tracing::Instrument;
|
||||||
|
|
||||||
|
/// Spawns `future` onto the ambient Tokio runtime, wrapped in a
|
||||||
|
/// `corex_io_task` tracing span.
|
||||||
|
///
|
||||||
|
/// # Panics
|
||||||
|
///
|
||||||
|
/// Panics if called outside the context of a running Tokio runtime; corex
|
||||||
|
/// does not construct or own a runtime of its own, it schedules onto
|
||||||
|
/// whichever runtime the caller is already inside.
|
||||||
|
pub fn spawn_io<F>(future: F) -> tokio::task::JoinHandle<F::Output>
|
||||||
|
where
|
||||||
|
F: std::future::Future + Send + 'static,
|
||||||
|
F::Output: Send + 'static,
|
||||||
|
{
|
||||||
|
let span = tracing::info_span!("corex_io_task");
|
||||||
|
tokio::spawn(future.instrument(span))
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use super::*;
|
||||||
|
|
||||||
|
#[tokio::test]
|
||||||
|
async fn spawn_io_roundtrips_a_value() {
|
||||||
|
let handle = spawn_io(async { 7u32 });
|
||||||
|
assert_eq!(handle.await.unwrap(), 7);
|
||||||
|
}
|
||||||
|
}
|
||||||
@@ -0,0 +1,19 @@
|
|||||||
|
//! Core allocation logic, global context initialization, and execution
|
||||||
|
//! primitives for [corex](https://docs.rs/corex).
|
||||||
|
//!
|
||||||
|
//! This crate is not typically consumed directly; applications should
|
||||||
|
//! depend on the `corex` facade crate instead, which re-exports the pieces
|
||||||
|
//! of this crate behind feature flags.
|
||||||
|
|
||||||
|
pub mod context;
|
||||||
|
#[cfg(feature = "compute")]
|
||||||
|
pub mod error;
|
||||||
|
|
||||||
|
#[cfg(feature = "io")]
|
||||||
|
pub mod io;
|
||||||
|
|
||||||
|
#[cfg(feature = "compute")]
|
||||||
|
pub mod compute;
|
||||||
|
|
||||||
|
#[cfg(feature = "bg")]
|
||||||
|
pub mod bg;
|
||||||
@@ -0,0 +1,41 @@
|
|||||||
|
//! Demonstrates `corex`'s three execution primitives end to end, including
|
||||||
|
//! automatic recovery from a panicking compute closure.
|
||||||
|
|
||||||
|
#[tokio::main]
|
||||||
|
async fn main() {
|
||||||
|
tracing_subscriber::fmt::init();
|
||||||
|
|
||||||
|
let ctx = corex::init();
|
||||||
|
println!(
|
||||||
|
"engine context: io_threads={} compute_threads={} bg_concurrency={}",
|
||||||
|
ctx.io_threads, ctx.compute_threads, ctx.bg_concurrency
|
||||||
|
);
|
||||||
|
|
||||||
|
let io_handle = corex::spawn_io(async {
|
||||||
|
tokio::time::sleep(std::time::Duration::from_millis(50)).await;
|
||||||
|
42u64
|
||||||
|
});
|
||||||
|
|
||||||
|
let sum_result = corex::compute(|| (1..=1_000u64).sum::<u64>());
|
||||||
|
|
||||||
|
let panic_result: Result<u64, corex::CorexError> = corex::compute(|| {
|
||||||
|
panic!("intentional panic to demonstrate isolation");
|
||||||
|
});
|
||||||
|
|
||||||
|
let recovery_result = corex::compute(|| 2u64 + 2u64);
|
||||||
|
|
||||||
|
let bg_handle = corex::spawn_bg(async {
|
||||||
|
tokio::time::sleep(std::time::Duration::from_millis(10)).await;
|
||||||
|
"bg-task-done"
|
||||||
|
})
|
||||||
|
.await;
|
||||||
|
|
||||||
|
let io_value = io_handle.await.expect("io task panicked");
|
||||||
|
let bg_value = bg_handle.await.expect("bg task panicked");
|
||||||
|
|
||||||
|
println!("spawn_io result: {io_value}");
|
||||||
|
println!("compute sum result: {sum_result:?}");
|
||||||
|
println!("compute panic-isolation result: {panic_result:?}");
|
||||||
|
println!("compute pool still usable after panic: {recovery_result:?}");
|
||||||
|
println!("spawn_bg result: {bg_value}");
|
||||||
|
}
|
||||||
+39
@@ -0,0 +1,39 @@
|
|||||||
|
//! # corex
|
||||||
|
//!
|
||||||
|
//! Resource-aware abstractions for async I/O, heavy compute, and
|
||||||
|
//! background queue management, built on a single lazily-initialized
|
||||||
|
//! global engine context.
|
||||||
|
//!
|
||||||
|
//! Call [`init`] once at startup (or simply let the first call to any
|
||||||
|
//! entry point below trigger it lazily) and then use whichever of the
|
||||||
|
//! feature-gated entry points your workload needs:
|
||||||
|
//!
|
||||||
|
//! - [`spawn_io`] (feature `io`) — spawn an async I/O task, tracing-instrumented.
|
||||||
|
//! - [`compute`] (feature `compute`) — run CPU-bound work on a sized Rayon pool, panic-isolated.
|
||||||
|
//! - [`spawn_bg`] (feature `bg`) — spawn a background task under bounded concurrency.
|
||||||
|
//!
|
||||||
|
//! Enable the `full` feature to pull in all three at once.
|
||||||
|
|
||||||
|
pub use corex_core::context::{context, EngineContext};
|
||||||
|
|
||||||
|
#[cfg(feature = "compute")]
|
||||||
|
pub use corex_core::error::CorexError;
|
||||||
|
|
||||||
|
#[cfg(feature = "io")]
|
||||||
|
pub use corex_core::io::spawn_io;
|
||||||
|
|
||||||
|
#[cfg(feature = "compute")]
|
||||||
|
pub use corex_core::compute::compute;
|
||||||
|
|
||||||
|
#[cfg(feature = "bg")]
|
||||||
|
pub use corex_core::bg::spawn_bg;
|
||||||
|
|
||||||
|
/// Bootstraps the global corex [`EngineContext`].
|
||||||
|
///
|
||||||
|
/// See [`corex_core::context::init`] for full semantics: this is safe to
|
||||||
|
/// call any number of times, from any thread, and is equivalent to letting
|
||||||
|
/// the first call to [`spawn_io`], [`compute`], or [`spawn_bg`] trigger
|
||||||
|
/// initialization implicitly.
|
||||||
|
pub fn init() -> &'static EngineContext {
|
||||||
|
corex_core::context::init()
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user