trying to setup a jobs flag

apatheia.nimble

@@ -9,7 +9,7 @@ srcDir        = "src"
 # Dependencies
 
 requires "chronos >= 4.0.0"
-requires "threading"
+requires "threading#head"
 requires "taskpools >= 0.0.5"
 requires "chronicles"
 

src/apatheia/jobs.nim

@@ -61,6 +61,11 @@ template toOpenArray*[T](arr: OpenArrayHolder[T]): auto =
 func jobId*[T](fut: Future[T]): JobId =
   JobId fut.id()
 
+proc cancelled*[T](jobResult: JobResult[T]): bool =
+  # acquire jobResult.flags[].lock
+  # result = jobResult.flags[].isCancelled
+  discard
+
 proc processJobs*[T](jobs: JobQueue[T]) {.async.} =
   ## Starts a "detached" async processor for a given job queue.
   ## 
@@ -87,6 +92,7 @@ proc createFuture*[T](jobs: JobQueue[T], name: static string): (JobResult[T], Fu
   let fut = newFuture[T](name)
   let id = fut.jobId()
   let flags = newSharedPtr(JobFlags)
+  flags[].lock.initLock()
   jobs.futures[id] = (fut, flags)
   trace "job added: ", numberJobs = jobs.futures.len()
   return (JobResult[T](id: id, queue: jobs.queue, flags: flags), fut)

tests/tjobs.nim

@@ -34,6 +34,17 @@ proc strCompute(jobResult: JobResult[int], vals: OpenArrayHolder[char]) =
 proc addStrings(jobResult: JobResult[float], vals: OpenArrayHolder[string]) =
   discard
 
+proc cancelTest(jobResult: JobResult[float], base: float, vals: OpenArrayHolder[float]) =
+  os.sleep(300)
+  if jobResult.cancelled():
+    discard
+    # discard jobResult.queue.send((jobResult.id, res,))
+
+  var res = base
+  for x in vals.toOpenArray():
+    res += x
+  discard jobResult.queue.send((jobResult.id, res,))
+
 suite "async tests":
 
   var tp = Taskpool.new(num_threads = 2) # Default to the number of hardware threads.
@@ -75,3 +86,8 @@ suite "async tests":
         var jobs = newJobQueue[float](taskpool = tp)
         let job = jobs.submit(addStrings(@["a", "b", "c"]))
     )
+
+  asyncTest "testing cancel":
+    var jobs = newJobQueue[float](taskpool = tp)
+    let res = await jobs.submit(addNumValues(10.0, @[1.0.float, 2.0]))
+    check res == 13.0