skb_peek_tail(9) [centos man page]

SKB_PEEK_TAIL(9)						 Linux Networking						  SKB_PEEK_TAIL(9)

NAME

       skb_peek_tail - peek at the tail of an sk_buff_head

SYNOPSIS

       struct sk_buff * skb_peek_tail(const struct sk_buff_head * list_);

ARGUMENTS

       list_
	   list to peek at

DESCRIPTION

       Peek an sk_buff. Unlike most other operations you _MUST_ be careful with this one. A peek leaves the buffer on the list and someone else
       may run off with it. You must hold the appropriate locks or have a private queue to do this.

       Returns NULL for an empty list or a pointer to the tail element. The reference count is not incremented and the reference is therefore
       volatile. Use with caution.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							  SKB_PEEK_TAIL(9)

queue(n)							Tcl Data Structures							  queue(n)

NAME

       queue - Create and manipulate queue objects

SYNOPSIS

       package require Tcl 8.2

       package require struct ?1.2.1?

       queueName option ?arg arg ...?

       queueName clear

       queueName destroy

       queueName get ?count?

       queueName peek ?count?

       queueName put item ?item ...?

       queueName size

DESCRIPTION

       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:

       queueName option ?arg arg ...?
	      Option and the args determine the exact behavior of the command.	The following commands are possible for queue objects:

       queueName clear
	      Remove all items from the queue.

       queueName destroy
	      Destroy the queue, including its storage space and associated command.

       queueName get ?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.

       queueName peek ?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.

       queueName put item ?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.

       queueName size
	      Return the number of items in the queue.

KEYWORDS

       stack, matrix, tree, graph

struct								       1.2.1								  queue(n)