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

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- `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>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-15 13:52:22 +03:00
parent f5d1a62ccf
commit c10abd9f9f
22 changed files with 57464 additions and 55794 deletions
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12
tools/ludic-cli/build.ludic
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@ -48,7 +48,7 @@ function compile_app(src: pointer, out: pointer, mode: int, save: bool) -> bool
if mode == 2 {
if not shq(`{ludicc()} --headless {src} --emit-llvm -o {ll}`) { return false }
if not shq(`{cc()} -O2 {ll}{gl_link_flags(ll)}{vk_link_flags(ll)}{http_link_flags(ll)}{pbf} -o {out}`) { return false }
if not shq(`{cc()} -O2 {ll}{gl_link_flags(ll)}{vk_link_flags(ll)}{http_link_flags(ll)}{threads_link_flags(ll)}{pbf} -o {out}`) { return false }
if not save { shell(`rm -f {ll}`) }
return true
}
@ -58,7 +58,7 @@ function compile_app(src: pointer, out: pointer, mode: int, save: bool) -> bool
# canonical `ludicc -o` path links it only when Audio.* is used.
let cocoa = `{home}runtime/native/cocoa.ll`
let audio = `{home}runtime/native/audio.ll`
if not shq(`{cc()} -O2 {ll} {cocoa} {audio} -framework Cocoa -Wl,-needed_framework,GameController -Wl,-needed_framework,AVFoundation -Wl,-rpath,@loader_path{gl_link_flags(ll)}{vk_link_flags(ll)}{http_link_flags(ll)}{pbf} -o {out}`) { return false }
if not shq(`{cc()} -O2 {ll} {cocoa} {audio} -framework Cocoa -Wl,-needed_framework,GameController -Wl,-needed_framework,AVFoundation -Wl,-rpath,@loader_path{gl_link_flags(ll)}{vk_link_flags(ll)}{http_link_flags(ll)}{threads_link_flags(ll)}{pbf} -o {out}`) { return false }
if not save { shell(`rm -f {ll}`) }
return true
}
@ -91,6 +91,14 @@ function http_link_flags(ll: pointer) -> pointer {
return ` {ludic_home()}runtime/native/http.ll -Wl,-needed_framework,Foundation`
}
# A program that uses Job.* / Promise.* / Sync.* calls the thr_* OS-thread runtime; link
# threads.ll only then, as `ludicc -o` does.
function threads_link_flags(ll: pointer) -> pointer {
if not shq(`grep -q "call .*@thr_" {ll}`) { return "" }
if host_windows() { return ` {ludic_home()}runtime/native/threads_win.ll` }
return ` {ludic_home()}runtime/native/threads.ll`
}
# the directory part of a path, without the trailing '/' ("" when there is none)
function dir_of_path(p: pointer) -> pointer {
var last = -1