cl-skip-list

2022-07-08

Concurrent lock-free skip list.

Upstream URL

github.com/kraison/cl-skip-list

Author

Kevin Raison <last name @ chatsubo dot net>

Maintainer

Kevin Raison

License

Not determined

README
Concurrent lockless skip lists for Common Lisp. Currently, "Common Lisp" means SBCL version 1.0.42 or higher. If other Lisps support compare-and-swap and memory barriers, let me know and I will add macros for those Lisps. There is also a need to sort update locations based on some global order, in this case the pointer addresses. SBCL allows that via (logandc2 (sb-kernel:get-lisp-obj-address vector) sb-vm:lowtag-mask)) combined with sb-sys:with-pinned-objects to avoid a GC moving things around. Do other Lisps have similar facilities? TODO 1. Improve performance by reusing CCAS descriptors during the first phase of an MCAS 2. Add search fingers 2. Add skip list merges 3. Add splitting DONE 1. Added a skip-list-based priority queue 2. Added memory barriers where necessary, making the code dependent on sbcl 1.0.42

Dependencies (1)

  • cffi

Dependents (0)

    • GitHub
    • Quicklisp