The ::struct::queue command creates a new queue
object with an associated global Tcl command whose name is
queueName. This command may be used to invoke various
operations on the queue. It has the following general form:
queueNameoption ?arg arg ...?
Option and the args
determine the exact behavior of the command. The following commands
are possible for queue objects:
queueNameclear
Remove all items from the queue.
queueNamedestroy
Destroy the queue, including its storage space and associated
command.
queueNameget ?count?
Return the front count items of the queue
and remove them from the queue. If count is not
specified, it defaults to 1. If count is 1, the
result is a simple string; otherwise, it is a list. If specified,
count must be greater than or equal to 1. If
there are no items in the queue, this command will return count empty strings.
queueNamepeek ?count?
Return the front count items of the queue,
without removing them from the queue. If count
is not specified, it defaults to 1. If count is
1, the result is a simple string; otherwise, it is a list. If
specified, count must be greater than or equal
to 1. If there are no items in the queue, this command will return
count empty strings.
queueNameputitem ?item ...?
Put the item or items specified into the
queue. If more than one item is given, they will
be added in the order they are listed.