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discard """
output: ""
disabled: "freebsd" # see #15725
"""
import threadpool, os
var chan: Channel[int]
chan.open(2)
chan.send(1)
chan.send(2)
doAssert(not chan.trySend(3)) # At this point chan is at max capacity
proc receiver() =
doAssert(chan.recv() == 1)
doAssert(chan.recv() == 2)
doAssert(chan.recv() == 3)
doAssert(chan.recv() == 4)
doAssert(chan.recv() == 5)
var msgSent = false
proc emitter() =
chan.send(3)
msgSent = true
spawn emitter()
# At this point emitter should be stuck in `send`
sleep(50) # Sleep a bit to ensure that it is still stuck
doAssert(not msgSent)
spawn receiver()
sleep(50) # Sleep a bit to let receicer consume the messages
doAssert(msgSent) # Sender should be unblocked
doAssert(chan.trySend(4))
chan.send(5)
sync()
|
