* the number of canceled alarm callback functions
* - value greater or equal 0 and rte_errno set to EINPROGRESS, at least one
* alarm could not be canceled because cancellation was requested from alarm
* the number of canceled alarm callback functions
* - value greater or equal 0 and rte_errno set to EINPROGRESS, at least one
* alarm could not be canceled because cancellation was requested from alarm
* alarm callbacks
* - 0 and rte_errno set to ENOENT - no alarm found
* - -1 and rte_errno set to EINVAL - invalid parameter (NULL callback)
* alarm callbacks
* - 0 and rte_errno set to ENOENT - no alarm found
* - -1 and rte_errno set to EINVAL - invalid parameter (NULL callback)