testhashset.nim

import sets, hashes

type
  PDispatcher* = ref object
    handles: HashSet[AsyncFD]

  AsyncFD* = distinct int

proc hash(x: AsyncFD): Hash {.borrow.}
proc `==`*(x: AsyncFD, y: AsyncFD): bool {.borrow.}

var gDisp{.threadvar.}: PDispatcher ## Global dispatcher

proc newDispatcher*(): PDispatcher =
  ## Creates a new Dispatcher instance.
  new result
  result.handles = initSet[AsyncFD]()

proc setGlobalDispatcher*(disp: PDispatcher) =
  gDisp = disp

proc getGlobalDispatcher*(): PDispatcher =
  if gDisp.isNil:
    setGlobalDispatcher(newDispatcher())
  result = gDisp

proc register*(fd: AsyncFD) =
  getGlobalDispatcher().handles.incl(fd)

proc unregister*(fd: AsyncFD) =
  getGlobalDispatcher().handles.excl(fd)

when isMainModule:
  for i in 0 ..< 1000:
    echo "Iteration ", i
    for i in 0 ..< 100_000:
      register(AsyncFD(i))
      if i mod 10_000 == 0:
        echo "registering ", i
    for i in 0 ..< 100_000:
      unregister(AsyncFD(i))
      if i mod 10_000 == 0:
        echo "unregistering ", i
    echo "Iteration ", i, " finished, press Enter to continue"
    var c = readLine(stdin)