Returns the number of objects currently in a mailbox.
mp
mailbox-count mailbox => count
mailbox⇩ |
A mailbox. |
count⇩ |
A non-negative integer. |
The function mailbox-count
returns the number of objects currently in the mailbox mailbox.
mailbox should be an object of type mailbox.
A mailbox is empty if its count is 0
.
mailbox-empty-p
mailbox-not-empty-p
make-mailbox
19.6.3 Communication between processes and synchronization
LispWorks® User Guide and Reference Manual - 01 Dec 2021 19:30:51