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|
(.module:
[lux #*
["@" target]
["." host]
[abstract
["." monad (#+ do)]]
[control
["." exception (#+ exception:)]
["." io (#+ IO io)]]
[data
[collection
["." list]]]
[math
[number
["n" nat]
["f" frac]]]]
[//
["." atom (#+ Atom)]])
(with_expansions [<jvm> (as_is (host.import: java/lang/Object)
(host.import: java/lang/Runtime
["#::."
(#static getRuntime [] java/lang/Runtime)
(availableProcessors [] int)])
(host.import: java/lang/Runnable)
(host.import: java/util/concurrent/TimeUnit
["#::."
(#enum MILLISECONDS)])
(host.import: java/util/concurrent/Executor
["#::."
(execute [java/lang/Runnable] #io void)])
(host.import: (java/util/concurrent/ScheduledFuture a))
(host.import: java/util/concurrent/ScheduledThreadPoolExecutor
["#::."
(new [int])
(schedule [java/lang/Runnable long java/util/concurrent/TimeUnit] #io (java/util/concurrent/ScheduledFuture java/lang/Object))]))]
(for {@.old (as_is <jvm>)
@.jvm (as_is <jvm>)
@.js
(as_is (host.import: (setTimeout [host.Function host.Number] #io Any)))
@.python
(host.import: threading/Timer
(new [host.Float host.Function])
(start [] #io #? Any))}
## Default
(type: Thread
{#creation Nat
#delay Nat
#action (IO Any)})
))
(def: #export parallelism
Nat
(with_expansions [<jvm> (|> (java/lang/Runtime::getRuntime)
(java/lang/Runtime::availableProcessors)
.nat)]
(for {@.old <jvm>
@.jvm <jvm>}
## Default
1)))
(with_expansions [<jvm> (as_is (def: runner
java/util/concurrent/ScheduledThreadPoolExecutor
(java/util/concurrent/ScheduledThreadPoolExecutor::new (.int ..parallelism))))]
(for {@.old <jvm>
@.jvm <jvm>
@.js (as_is)
@.python (as_is)}
## Default
(def: runner
(Atom (List Thread))
(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)))
@.js
(..setTimeout [(host.closure [] (io.run action))
(n.frac milli_seconds)])
@.python
(do io.monad
[_ (|> (host.lambda [] (io.run action))
[(|> milli_seconds n.frac (f./ +1,000.0))]
threading/Timer::new
(threading/Timer::start []))]
(wrap []))}
## 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)
@.js (as_is)
@.python (as_is)}
## Default
(as_is (exception: #export cannot_continue_running_threads)
(def: #export (run! _)
(-> Any (IO Any))
(do {! io.monad}
[threads (atom.read ..runner)]
(case threads
## And... we're done!
#.Nil
(wrap [])
_
(do !
[#let [now (.nat ("lux io current-time"))
[ready pending] (list.partition (function (_ thread)
(|> (get@ #creation thread)
(n.+ (get@ #delay thread))
(n.<= now)))
threads)]
swapped? (atom.compare_and_swap threads pending ..runner)]
(if swapped?
(do !
[_ (monad.map ! (get@ #action) ready)]
(run! []))
(error! (exception.construct ..cannot_continue_running_threads []))))
)))
))
|
