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Matthew Flatt c46e4f91c1 Chez Scheme GC: internal parallelism by messages instead of locks 
Change the internal parallelism strategy for the GC to record an owner
for each allocated segment of memory, and have the owner be solely
responsible for copying or marking objects of the segment. When
sweeping, a collecting thread handles references to objects that it
owns or that have been copied or marked already, and it asks another
collecting thread to resweep an object that refers to objects owned by
that that thread. At worst, an object ends up being swept by all
collecting threads, one at a time, but that's unlikely for a given
object.

The approach seems likely to scale better than a lock-based approach,
even the one that used a lightweight, CAS-based lock and retries on
lock failure.
2020-09-27 15:36:40 -06:00
.github bc: declare interntional unsafe fixnum arithmetic 2020-09-22 07:57:32 -06:00
pkgs improve value-contract handling a little bit 2020-09-24 17:18:27 -05:00
racket Chez Scheme GC: internal parallelism by messages instead of locks 2020-09-27 15:36:40 -06:00
.gitattributes Don't include git files in archives. 2010-05-12 01:46:05 -04:00
.gitignore Fix typo. 2019-06-21 12:32:37 -05:00
.lgtm.yml Fetch PB to start LGTM build 2020-08-07 12:17:17 +02:00
.mailmap Minor metadata changes. 2019-10-15 08:09:32 -04:00
.makefile Chez Scheme GC: internal parallelism by messages instead of locks 2020-09-27 15:36:40 -06:00
build.md fix typo 2020-08-20 18:39:33 -06:00
LICENSE Recent GMP is under LGPL v3. 2020-05-01 22:26:25 -04:00
Makefile Chez Scheme GC: internal parallelism by messages instead of locks 2020-09-27 15:36:40 -06:00
README.md Fix README 2020-09-06 09:03:42 -04:00

README.md

Racket is a general-purpose programming language and an ecosystem for language-oriented programming.

This repository holds the source code for the core of Racket plus some related packages. The rest of the Racket distribution source code is in other repositories, mostly under the Racket GitHub organization.

Quick Start

Pre-built versions of Racket for a variety of operating systems and architectures, as well as convenient source distributions are available at

https://download.racket-lang.org

Racket comes with extensive documentation, including several tutorials. You can read all of this documentation, as well as documentation for third-party packages at

https://docs.racket-lang.org

Building from Source

For information on building Racket from this repository, see the Build Guide.

Contributing

Contribute to Racket by submitting a pull request, joining the development mailing list, or visiting the IRC or Slack channels.

By making a contribution, you are agreeing that your contribution is licensed under the LGPLv3, Apache 2.0, and MIT licenses. Those licenses are available in this repository in the files racket/src/LICENSE-LGPL.txt, racket/src/LICENSE-APACHE.txt, and racket/src/LICENSE-MIT.txt.

See the Racket Build Guide for more guidance on contributing.

The Friendly Environment Policy contains guidelines on expected behavior within the Racket community.

License

Racket is free software; see LICENSE for more details.