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|
(.module:
[lux #*
["@" target]
["." host]
[abstract
["." monad (#+ do)]]
[control
["ex" exception (#+ exception:)]
["." io (#+ IO io)]]
[data
[number
["n" nat]]
[collection
["." list]]]]
[//
["." atom (#+ Atom)]])
(for {@.old
(as-is (host.import: #long java/lang/Object)
(host.import: #long java/lang/Runtime
(#static getRuntime [] java/lang/Runtime)
(availableProcessors [] int))
(host.import: #long java/lang/Runnable)
(host.import: #long java/util/concurrent/TimeUnit
(#enum MILLISECONDS))
(host.import: #long java/util/concurrent/Executor
(execute [java/lang/Runnable] #io void))
(host.import: #long (java/util/concurrent/ScheduledFuture a))
(host.import: #long java/util/concurrent/ScheduledThreadPoolExecutor
(new [int])
(schedule [java/lang/Runnable long java/util/concurrent/TimeUnit] #io (java/util/concurrent/ScheduledFuture java/lang/Object))))
@.jvm
(as-is (host.import: #long java/lang/Object)
(host.import: #long java/lang/Runtime
(#static getRuntime [] java/lang/Runtime)
(availableProcessors [] int))
(host.import: #long java/lang/Runnable)
(host.import: #long java/util/concurrent/TimeUnit
(#enum MILLISECONDS))
(host.import: #long java/util/concurrent/Executor
(execute [java/lang/Runnable] #io void))
(host.import: #long (java/util/concurrent/ScheduledFuture a))
(host.import: #long java/util/concurrent/ScheduledThreadPoolExecutor
(new [int])
(schedule [java/lang/Runnable long java/util/concurrent/TimeUnit] #io (java/util/concurrent/ScheduledFuture java/lang/Object))))}
## Default
(type: Process
{#creation Nat
#delay Nat
#action (IO Any)})
)
(def: #export parallelism
Nat
(for {@.old
(|> (java/lang/Runtime::getRuntime)
(java/lang/Runtime::availableProcessors)
.nat)
@.jvm
(|> (java/lang/Runtime::getRuntime)
(java/lang/Runtime::availableProcessors)
.nat)}
## Default
1))
(def: runner
(for {@.old
(java/util/concurrent/ScheduledThreadPoolExecutor::new (.int ..parallelism))
@.jvm
(java/util/concurrent/ScheduledThreadPoolExecutor::new (.int ..parallelism))}
## Default
(: (Atom (List Process))
(atom.atom (list)))))
(def: #export (schedule milli-seconds action)
(-> Nat (IO Any) (IO Any))
(for {@.old
(let [runnable (host.object [] [java/lang/Runnable]
[]
(java/lang/Runnable [] (run self) void
(io.run action)))]
(case milli-seconds
0 (java/util/concurrent/Executor::execute runnable runner)
_ (java/util/concurrent/ScheduledThreadPoolExecutor::schedule runnable (.int milli-seconds) java/util/concurrent/TimeUnit::MILLISECONDS
runner)))
@.jvm
(let [runnable (host.object [] [java/lang/Runnable]
[]
(java/lang/Runnable [] (run self) void
(io.run action)))]
(case milli-seconds
0 (java/util/concurrent/Executor::execute runnable runner)
_ (java/util/concurrent/ScheduledThreadPoolExecutor::schedule runnable (.int milli-seconds) java/util/concurrent/TimeUnit::MILLISECONDS
runner)))}
## Default
(do io.monad
[_ (atom.update (|>> (#.Cons {#creation (.nat ("lux io current-time"))
#delay milli-seconds
#action action}))
..runner)]
(wrap []))))
(for {@.old
(as-is)
@.jvm
(as-is)}
## Default
(as-is (exception: #export cannot-continue-running-processes)
(def: #export (run! _)
(-> Any (IO Any))
(do {@ io.monad}
[processes (atom.read ..runner)]
(case processes
## And... we're done!
#.Nil
(wrap [])
_
(do @
[#let [now (.nat ("lux io current-time"))
[ready pending] (list.partition (function (_ process)
(|> (get@ #creation process)
(n.+ (get@ #delay process))
(n.<= now)))
processes)]
swapped? (atom.compare-and-swap processes pending ..runner)]
(if swapped?
(do @
[_ (monad.map @ (get@ #action) ready)]
(run! []))
(error! (ex.construct ..cannot-continue-running-processes []))))
)))
))
|
