Crate rb_sys

rb-sys

Autogenerated Rust bindings for Ruby. Uses the rust-bindgen crate to generate bindings from the ruby.h header.https://github.com/rust-lang/rust-bindgen

⚠️ Notice

This is a very low-level library. If you are looking to write a gem in Rust, you should probably use https://github.com/matsadler/magnus crate, with the rb-sys-interop feature.

If you actually need raw/unsafe bindings to libruby, then this crate if for you!

Usage

Writing a Ruby gem

Ruby gems require a bit of boilerplate to be defined to be usable from Ruby. rb-sys makes this process painless by doing the work for you, by simply enabling the gem feature.

rb-sys = "0.9"

Under the hood this ensures we do not link libruby (unless on Windows), and defines a ruby_abi_version function for Ruby 3.2+.

See this example of creating a Ruby gem in Rust

Embedding libruby in your Rust app

IMPORTANT: If you are authoring a Ruby gem, you do not need to enable this feature.

If you need to link libruby (i.e. you are initializing a Ruby VM in your Rust code), use can enable the link-ruby feature:

rb-sys = { version = "0.9",  features = ["link-ruby"] }

Static libruby

You can also force static linking of libruby:

rb-sys = { version = "0.9", features = ["ruby-static"] }

Alternatively, you can set the RUBY_STATIC=true environment variable.

Other features

• global-allocator: Report Rust memory allocations to the Ruby GC (recommended).
• ruby-static: Link the static version of libruby.
• link-ruby: Link libruby.
• bindgen-rbimpls: Include the Ruby impl types in bindings.
• bindgen-deprecated-types: Include deprecated Ruby methods in bindings.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

Re-exports

• pub use bindings::*;
• pub use special_consts::*;
• pub use value_type::*;

Modules

• bindings
  Raw bindings to libruby, generated by bindgen.
• memory
• special_consts
  Definitions for Ruby’s special constants.
• symbol
• tracking_allocator
  Support for reporting Rust memory usage to the Ruby GC.
• value_type
  Definitions for Ruby’s special constants.

Macros

• rb_gc_guard
  Prevents premature destruction of local objects.
• rb_intern
  Finds or creates a symbol for the given static string. This macro will memoize the ID to avoid repeated calls to libruby. You should prefer this macro over [rb_intern3] when the string is known at compile time.
• ruby_abi_versionDeprecated
• set_global_tracking_allocator
  Set the global allocator to TrackingAllocator.

Type Aliases

• RubyValueDeprecated
• ValueDeprecated