Sequester v2.0.0-alpha.3

• Update LICENSE for current year.

Closes #74.

Sequester v2.0.0-alpha.2

• Build with Node.js 16 on GitHub Actions.
• Build with Node.js 16 on Travis CI.

Closes #73.

Sequester v2.0.0-alpha.1

• Update LICENSE for 2021.
• Build with Node.js 12, 14 and 15 on CI/CD.

Closes #72.

Sequester v2.0.0-alpha.0

• Convert to async/await. Closes #69.
• Sketch.
• Caret pin Proof. See #67.
• Fix broken Proof invocation. See #67.
• Add badges and links to README.md. Closes #94.
• Update LICENSE for 2020. Closes #68.
• Build with Actions, ship coverage to Codecov. Closes #65. Closes #66.
• Upgrade proof to 9.0.2. Closes #67.
• Update .gitignore. See #64.

Closes #71.

Sequester 0.0.10

Tidy and start of README.md. Otherwise, no changes.

• Release version 0.0.10. #55, 3e16084.
• Update package.json keywords. 7eaf115.
• Allow for Pull Request builds on Travis CI. 837f3b3.
• Upgrade Proof to 0.0.56. #54, 1f4c73a, a44e99c.
• Create a Markdown README.md. 6bb4c75, 7b25795, ca6bc58, 394c54c.
• Remove shebang line from tests. ba813b0.
• Tidy tests for latest Proof conventions. 752022f.
• Build on Travis CI without sudo. 3c51c30.
• Change Node.js target versions on Travis CI. e320627.
• Tidy project directory. 9ee8e33.
• Fix license in package.json. 99970f4.
• Update license for 2015. #53, 090cebd.

Changes between v0.0.9...v0.0.10.

Sequester 0.0.6

LGPL 3.0

Sequester is used to implement the Strata b-tree. Strata will be released under the LGPL 3.0. All the supporting libraries will also be released under LGPL 3.0.

Issue by Issue

• Release version 0.0.6. #36.
• Add LGPL 3.0. #35.

Sequester 0.0.1

28th Stop by Moriza.

Sequester Announce

Sequester is a writer preferred read/write lock for concurrent evented operations. I've extracted it from Strata where it's used to guard the b-tree pages.

This read/write lock allows many different "threads" of execution to use a resource in parallel, but when it is time to write, all readers will wait on a single writing "thread." The writing "thread" will wait until all outstanding readers release their lock before it writes.

This minimal concurrency primitive can be used implement standard semaphores if you only ever call exclude, read/write locks, and latches if you start of holding exclude.

Installing Sequester 0.0.1

npm install sequester

Issue By Issue

• Test that exclusive locks block shared locks. #10.
• Test that shared locks block exclusive locks. #9.
• Track the minzipped size of the lock using t/sizes. #8.
• Import shared/exclusive lock from Strata. #7.
• Build on Travis CI. #4.
• Initialize project. #2.