Package queues

Collaboration diagram for Package queues:

Data Structures
struct	pkg_queue

Macros
#define	PKG_QUEUE_INIT    { .head = NULL, .tail = NULL, .length = 0 }
	Constant initializer for a package queue. More...
#define	PKG_QUEUE_OBJECT    (struct pkg_queue)PKG_QUEUE_INIT
	Compound literal for a package queue. More...

Functions
void	pkg_queue_init (struct pkg_queue *queue)
	Initialize a package queue. More...
void	pkg_queue_destroy (struct pkg_queue *queue)
	Destroy a package queue. More...
int	pkg_queue_is_empty (struct pkg_queue *queue)
	Check if a package queue is empty. More...
struct pkg_list *	pkg_queue_push (struct pkg_queue *queue, struct pkginfo *pkg)
	Push a new node containing pkginfo to the tail of the queue. More...
struct pkginfo *	pkg_queue_pop (struct pkg_queue *queue)
	Pop a node containing pkginfo from the head of the queue. More...

Detailed Description

Macro Definition Documentation

PKG_QUEUE_INIT

#define PKG_QUEUE_INIT    { .head = NULL, .tail = NULL, .length = 0 }

Constant initializer for a package queue.

PKG_QUEUE_OBJECT

#define PKG_QUEUE_OBJECT    (struct pkg_queue)PKG_QUEUE_INIT

Compound literal for a package queue.

Function Documentation

pkg_queue_destroy()

void pkg_queue_destroy

(

struct pkg_queue *

queue

)

Destroy a package queue.

It frees the contained package list and resets the queue members.

Parameters

queue

The queue to destroy.

pkg_queue_init()

void pkg_queue_init

(

struct pkg_queue *

queue

)

Initialize a package queue.

Parameters

queue

The queue to initialize.

pkg_queue_is_empty()

int pkg_queue_is_empty

(

struct pkg_queue *

queue

)

Check if a package queue is empty.

Parameters

queue

The queue to check.

Returns

A boolean value.

Referenced by trigproc_run_deferred().

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pkg_queue_pop()

struct pkginfo * pkg_queue_pop

(

struct pkg_queue *

queue

)

Pop a node containing pkginfo from the head of the queue.

This removes and frees the node from the queue, effectively reducing its size.

Parameters

queue

The queue to remove from.

Returns

The pkginfo from the removed node, or NULL if the queue was empty.

pkg_queue_push()

struct pkg_list * pkg_queue_push	(	struct pkg_queue *	queue,
		struct pkginfo *	pkg
	)

Push a new node containing pkginfo to the tail of the queue.

Parameters

queue	The queue to insert to.
pkg	The package to use fo the new node.

Returns

The newly inserted pkg_list node.

Referenced by enqueue_conflictor(), and enqueue_package().

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