Query if an Aio is Unresolved — unresolved • nanonext

Query whether an Aio, Aio value or list of Aios remains unresolved. Unlike call_aio(), this function does not wait for completion.

unresolved(x)

Arguments

x: an Aio or list of Aios (objects of class 'sendAio', 'recvAio' or 'ncurlAio'), or Aio value stored at $result or $data etc.

Value

Logical TRUE if x is an unresolved Aio or Aio value or the list of Aios contains at least one unresolved Aio, or FALSE otherwise.

Details

Suitable for use in control flow statements such as while or if.

Note: querying resolution may cause a previously unresolved Aio to resolve.

Examples

s1 <- socket("pair", listen = "inproc://nanonext")
aio <- send_aio(s1, "test", timeout = 100)

while (unresolved(aio)) {
  # do stuff before checking resolution again
  cat("unresolved\n")
  msleep(100)
}
#> unresolved

unresolved(aio)
#> [1] FALSE

close(s1)