Scheme Request for Implementation 230, "Atomic Operations," by Marc Nieper-Wißkirchen, has gone into *final* status.
The document and an archive of the discussion are available at https://srfi.schemers.org/srfi-230/. Here's the abstract: This SRFI defines atomic operations for the Scheme programming language. An *atomic operation* is an operation that, even in the presence of multiple threads, is either executed completely or not at all. Atomic operations can be used to implement mutexes and other synchronization primitives, and they can be used to make concurrent algorithms lock-free. For this, this SRFI defines two data types, *atomic flags* and *atomic (fixnum) boxes*, whose contents can be queried and mutated atomically. Moreover, each atomic operation comes with a *memory order* that defines the level of synchronization with other threads. Here is the commit summary since the most recent draft: - copy edits - Link to SRFIs 18 and 226. - Finalize. Here are the diffs since the most recent draft: https://github.com/scheme-requests-for-implementation/srfi-230/compare/draft-2..final Many thanks to Marc and to everyone who contributed to the discussion of this SRFI. Regards, SRFI Editor
