2015-04-16 21:37:32 +08:00
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[![travis][travis-badge]][travis-url]
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[![rustdoc][rustdoc-badge]][rustdoc-url]
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[travis-badge]: https://img.shields.io/travis/edef1c/libfringe.svg?style=flat-square
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[travis-url]: https://travis-ci.org/edef1c/libfringe
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[rustdoc-badge]: https://img.shields.io/badge/docs-rustdoc-brightgreen.svg?style=flat-square
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[rustdoc-url]: https://edef1c.github.io/libfringe
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# libfringe
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libfringe is a low-level green threading library for Rust.
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It's usable in freestanding environments (like kernels),
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but it can also provide an easy-to-use stack allocator using
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your operating system's memory mapping facility.
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## Performance
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2015-04-17 01:17:37 +08:00
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libfringe does context switches in 3.5ns flat on x86_64!
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```
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test swap ... bench: 7 ns/iter (+/- 0)
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2015-04-17 01:17:37 +08:00
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```
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…and on x86, a mere 2.5ns!
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```
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test swap ... bench: 5 ns/iter (+/- 1)
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```
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## Limitations
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2015-04-17 01:20:58 +08:00
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libfringe currently doesn't work on anything but x86 and x86_64,
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2015-04-16 21:37:32 +08:00
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and is untested on anything but Linux.
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## Installation
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libfringe is a [Cargo](https://crates.io) package.
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It's not stable software yet, so you'll have to use it as a git dependency.
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Add this to your `Cargo.toml`:
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```toml
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[dependencies.fringe]
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git = "https://github.com/edef1c/libfringe.git"
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```
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### Feature flags
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[Cargo's feature flags]: http://doc.crates.io/manifest.html#the-[features]-section
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libfringe provides several optional features through [Cargo's feature flags].
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Currently, all of them are enabled by default.
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#### `valgrind`
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[Valgrind]: http://valgrind.org
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[Valgrind] integration. libfringe will register context stacks with Valgrind.
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#### `os`
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[Built-in stack allocator]: https://edef1c.github.io/libfringe/fringe/struct.OsStack.html
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[Built-in stack allocator] using your your operating system's anonymous memory mapping facility.
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Currently only available for Unix.
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