asyncipc doesn't work on macos

[yglukhov]

import asynctools/asyncipc
let ipc = createIpc("blablabla")
let writeHandle = open("blablabla", sideWriter)

test.nim(3)              test
asyncipc.nim(476)        open
oserr.nim(110)           raiseOSError
Error: unhandled exception: Device not configured [OSError]

[yglukhov]

EDIT: Removed erroneous statement.

[yglukhov]

Ok, now I understand this is happening because that's how fifos work. However, is there any recommended way to sync the connection of 2 processes? Basically, my use-case is the following

# Parent process
import asynctools/asyncipc
let ipc = createIpc("blablabla")
spawnChildProcess()
let writeHandle = open("blablabla", sideWriter)

# Child process
let readHandle = open("blablabla", sideReader)

writeHandle can not be opened before the child process opens readHandle. How can I wait for the child process to open it?