ludic/docs/language/sync/sync-cpu_count.md at 4919c9c2fc84ea2aeb906961028dce516574936c

Orkuncakilkaya c10abd9f9f feat(jobs): real OS threads - Job.parallel_for, fn name, thread-safe Sync

- `fn name` names a top-level function as a value (E_FNREF, lowers to @fn_<name>); the worker
  entry point for Job.parallel_for, which checks it takes (int, pointer-like) and returns void.
- runtime/native/threads.ll (pthreads) and threads_win.ll (Win32 SRWLOCK/CONDITION_VARIABLE): a
  pool of one worker per core but one, parked between batches; every thread claims chunks by
  compare-and-swap. Linked only into programs that use Job/Promise/Sync, by `ludicc -o`,
  `ludic build` and the test suite's build helper.
- Sync.* is real: native mutexes, atomics as cmpxchg retry loops (neither clang takes atomicrw,
  the PC's rejects seq_consistent), mutex-guarded channels, Sync.cpu_count from the OS.
- spawn/despawn on a pool thread stop the program with a located panic.
- examples/library/threads.ludic and its test; docs for fn, Job.parallel_for, Job.is_worker.
- Reseeded (bootstrap-cfree: out.ll == seed.ll). 141/141 on macOS; jobs, threads and the guard
  pass on Windows from the reseeded Windows seed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

2026-09-15 13:52:22 +03:00

444 B

Raw Blame History

id	name	category	kind	tokens	sig	tip	order	ns	member
sync-cpu_count	Sync.cpu_count	sync	namespace-method	Sync.cpu_count	Sync.cpu_count() -> int	The machine's logical cores (1 to 64); Job.parallel_for uses one thread per core.	14	Sync	cpu_count

The machine's logical cores, from 1 to 64. Job.parallel_for runs on that many threads: a pool of one per core but one, plus the caller.

let lanes = Sync.cpu_count()

444 B Raw Blame History

444 B

Raw Blame History