#cell #blocking


A cell type containing a value which may not yet be available

1 unstable release

0.4.0 Mar 30, 2021
0.3.1 Jan 8, 2021
0.3.0 Dec 19, 2020
0.2.0 Dec 19, 2020
0.1.0 Dec 8, 2020

#191 in Concurrency

39 downloads per month
Used in waitcache

Apache-2.0 OR MIT

333 lines


This crate provides the WaitCell type, which is a thread-safe cell which can only be written once while shared. Attempts to read the value before it is written cause the reading thread to block.

Because the value can be written to only once while shared, WaitCell provides access to its value by shared reference.


Inline rustdoc documentation is available. A mirror of this documentation is available at https://docs.rs/waitcell.


waitcell is developed at GitLab.

Reasonable performance, correctness, documentation, and ease-of-use contributions are always welcome. Bug reports and feature suggestions are accepted through GitLab.

Pull Requests

Please ensure pull requests match the existing coding style and are formatted with rustfmt.

Spelling and grammatical errors are considered bugs, so please use spell-checking facilities prior to submitting a contribution.

Contribution Agreement

By contributing, you grant all contributors a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, relicense, sublicense, and distribute your contributions.

Additionally, you affirm that you are legally entitled to grant such license and that your contributions are not and will not become patent-encumbered. In the event that you discover that such affirmation was made in error, you agree to post notice of such error in a conspicuous place (such as a GitLab Issue) within three days.


waitcell is licensed under the terms of the Apache License, Version 2.0 or the MIT License.

The corresponding SPDX license identifier is Apache-2.0 OR MIT.


This document is Copyright (C) 2020 Nathan Sharp.

Permission is granted to reproduce this document, in any form, free of charge.