Macro: SB-THREAD::WITH-CAS-LOCK

Runs BODY with interrupts disabled and CURRENT-THREAD compare-and-swapped into PLACE instead of NIL. PLACE must be a place acceptable to COMPARE-AND-SWAP, and must initially hold NIL.

WITH-CAS-LOCK is suitable mostly when the critical section needing protection is very small, and cost of allocating a separate lock object would be prohibitive. While it is the most lightweight locking constructed offered by SBCL, it is also the least scalable if the section is heavily contested or long.

WITH-CAS-LOCK can be entered recursively.

Lambda list

((sb-thread::place) &body sb-thread::body)