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use pthreads
func _assert_success(name:Text, val:Int32; inline):
fail("$name() failed!") if val < 0
struct ConnectionQueue(_connections=@[:Int32], _mutex=pthread_mutex_t.new(), _cond=pthread_cond_t.new()):
func enqueue(queue:ConnectionQueue, connection:Int32):
queue._mutex:lock()
queue._connections:insert(connection)
queue._mutex:unlock()
queue._cond:signal()
func dequeue(queue:ConnectionQueue -> Int32):
conn := none:Int32
queue._mutex:lock()
while queue._connections.length == 0:
queue._cond:wait(queue._mutex)
conn = queue._connections:pop(1)
queue._mutex:unlock()
queue._cond:signal()
return conn!
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