58 lines
1.4 KiB
Text
58 lines
1.4 KiB
Text
/-
|
||
Copyright (c) 2021 Mac Malone. All rights reserved.
|
||
Released under Apache 2.0 license as described in the file LICENSE.
|
||
Authors: Mac Malone
|
||
-/
|
||
|
||
namespace Lake
|
||
|
||
instance : Monad Task where
|
||
map := Task.map
|
||
pure := Task.pure
|
||
bind := Task.bind
|
||
|
||
abbrev ETask ε α := ExceptT ε Task α
|
||
|
||
abbrev IOTask α := ETask IO.Error α
|
||
|
||
namespace IOTask
|
||
|
||
def spawn (act : IO α) (prio := Task.Priority.default) : IO (IOTask α) :=
|
||
IO.asTask act prio
|
||
|
||
def await (self : IOTask α) : IO α := do
|
||
IO.ofExcept (← IO.wait self)
|
||
|
||
def collectAll (tasks : List (IOTask α)) : IO (IOTask (List α)) :=
|
||
IO.asTask (tasks.mapM (·.await))
|
||
|
||
end IOTask
|
||
|
||
def BuildTask := IOTask PUnit
|
||
|
||
namespace BuildTask
|
||
|
||
def nop : BuildTask :=
|
||
pure ()
|
||
|
||
def spawn (act : IO PUnit) (prio := Task.Priority.dedicated) : IO BuildTask :=
|
||
IO.asTask act prio
|
||
|
||
def all (tasks : List BuildTask) (prio := Task.Priority.default) : IO BuildTask :=
|
||
IO.asTask (tasks.forM (·.await)) prio
|
||
|
||
end BuildTask
|
||
|
||
instance : Inhabited BuildTask := ⟨BuildTask.nop⟩
|
||
|
||
def afterTask (task : BuildTask) (act : IO PUnit) : IO BuildTask :=
|
||
IO.mapTask (fun x => IO.ofExcept x *> act) task
|
||
|
||
def afterTaskList (tasks : List BuildTask) (act : IO PUnit) : IO BuildTask :=
|
||
IO.mapTasks (fun xs => xs.forM IO.ofExcept *> act) <| tasks
|
||
|
||
instance : HAndThen BuildTask (IO PUnit) (IO BuildTask) :=
|
||
⟨afterTask⟩
|
||
|
||
instance : HAndThen (List BuildTask) (IO PUnit) (IO BuildTask) :=
|
||
⟨afterTaskList⟩
|