#include <ggi/gg-queue.h>
GG_SLIST_HEAD(HEADNAME, TYPE);
GG_SLIST_HEAD_INITIALIZER(head);
GG_SLIST_ENTRY(TYPE);
GG_SLIST_INIT(GG_SLIST_HEAD *head);
GG_SLIST_INSERT_AFTER(TYPE *listelm, TYPE *elm, GG_SLIST_ENTRY NAME);
GG_SLIST_INSERT_HEAD(GG_SLIST_HEAD *head, TYPE *elm, GG_SLIST_ENTRY NAME);
GG_SLIST_REMOVE_HEAD(GG_SLIST_HEAD *head, GG_SLIST_ENTRY NAME);
GG_SLIST_REMOVE(GG_SLIST_HEAD *head, TYPE *elm, TYPE, GG_SLIST_ENTRY NAME);
GG_SLIST_FOREACH(TYPE *var, GG_SLIST_HEAD *head, GG_SLIST_ENTRY NAME);
int
GG_SLIST_EMPTY(GG_SLIST_HEAD *head);
TYPE *
GG_SLIST_FIRST(GG_SLIST_HEAD *head);
TYPE *
GG_SLIST_NEXT(TYPE *elm, GG_SLIST_ENTRY NAME);
GG_SIMPLEQ_HEAD(HEADNAME, TYPE);
GG_SIMPLEQ_HEAD_INITIALIZER(head);
GG_SIMPLEQ_ENTRY(TYPE);
GG_SIMPLEQ_INIT(GG_SIMPLEQ_HEAD *head);
GG_SIMPLEQ_INSERT_HEAD(GG_SIMPLEQ_HEAD *head, TYPE *elm, GG_SIMPLEQ_ENTRY NAME);
GG_SIMPLEQ_INSERT_TAIL(GG_SIMPLEQ_HEAD *head, TYPE *elm, GG_SIMPLEQ_ENTRY NAME);
GG_SIMPLEQ_INSERT_AFTER(GG_SIMPLEQ_HEAD *head, TYPE *listelm, TYPE *elm,
GG_SIMPLEQ_ENTRY NAME);
GG_SIMPLEQ_REMOVE_HEAD(GG_SIMPLEQ_HEAD *head, GG_SIMPLEQ_ENTRY NAME);
GG_SIMPLEQ_REMOVE(GG_SIMPLEQ_HEAD *head, TYPE *elm, TYPE, GG_SIMPLEQ_ENTRY NAME);
GG_SIMPLEQ_FOREACH(TYPE *var, GG_SIMPLEQ_HEAD *head, GG_SIMPLEQ_ENTRY NAME);
int
GG_SIMPLEQ_EMPTY(GG_SIMPLEQ_HEAD *head);
TYPE *
GG_SIMPLEQ_FIRST(GG_SIMPLEQ_HEAD *head);
TYPE *
GG_SIMPLEQ_NEXT(TYPE *elm, GG_SIMPLEQ_ENTRY NAME);
GG_LIST_HEAD(HEADNAME, TYPE);
GG_LIST_HEAD_INITIALIZER(head);
GG_LIST_ENTRY(TYPE);
GG_LIST_INIT(GG_LIST_HEAD *head);
GG_LIST_INSERT_AFTER(TYPE *listelm, TYPE *elm, GG_LIST_ENTRY NAME);
GG_LIST_INSERT_BEFORE(TYPE *listelm, TYPE *elm, GG_LIST_ENTRY NAME);
GG_LIST_INSERT_HEAD(GG_LIST_HEAD *head, TYPE *elm, GG_LIST_ENTRY NAME);
GG_LIST_REMOVE(TYPE *elm, GG_LIST_ENTRY NAME);
GG_LIST_FOREACH(TYPE *var, GG_LIST_HEAD *head, GG_LIST_ENTRY NAME);
int
GG_LIST_EMPTY(GG_LIST_HEAD *head);
TYPE *
GG_LIST_FIRST(GG_LIST_HEAD *head);
TYPE *
GG_LIST_NEXT(TYPE *elm, GG_LIST_ENTRY NAME);
GG_TAILQ_HEAD(HEADNAME, TYPE);
GG_TAILQ_HEAD_INITIALIZER(head);
GG_TAILQ_ENTRY(TYPE);
GG_TAILQ_INIT(GG_TAILQ_HEAD *head);
GG_TAILQ_INSERT_HEAD(GG_TAILQ_HEAD *head, TYPE *elm, GG_TAILQ_ENTRY NAME);
GG_TAILQ_INSERT_TAIL(GG_TAILQ_HEAD *head, TYPE *elm, GG_TAILQ_ENTRY NAME);
GG_TAILQ_INSERT_AFTER(GG_TAILQ_HEAD *head, TYPE *listelm, TYPE *elm,
GG_TAILQ_ENTRY NAME);
GG_TAILQ_INSERT_BEFORE(TYPE *listelm, TYPE *elm, GG_TAILQ_ENTRY NAME);
GG_TAILQ_REMOVE(GG_TAILQ_HEAD *head, TYPE *elm, GG_TAILQ_ENTRY NAME);
GG_TAILQ_FOREACH(TYPE *var, GG_TAILQ_HEAD *head, GG_TAILQ_ENTRY NAME);
GG_TAILQ_FOREACH_REVERSE(TYPE *var, GG_TAILQ_HEAD *head, HEADNAME,
GG_TAILQ_ENTRY NAME);
int
GG_TAILQ_EMPTY(GG_TAILQ_HEAD *head);
TYPE *
GG_TAILQ_FIRST(GG_TAILQ_HEAD *head);
TYPE *
GG_TAILQ_NEXT(TYPE *elm, GG_TAILQ_ENTRY NAME);
TYPE *
GG_TAILQ_LAST(GG_TAILQ_HEAD *head, HEADNAME);
TYPE *
GG_TAILQ_PREV(TYPE *elm, HEADNAME, GG_TAILQ_ENTRY NAME);
GG_CIRCLEQ_HEAD(HEADNAME, TYPE);
GG_CIRCLEQ_HEAD_INITIALIZER(head);
GG_CIRCLEQ_ENTRY(TYPE);
GG_CIRCLEQ_INIT(GG_CIRCLEQ_HEAD *head);
GG_CIRCLEQ_INSERT_AFTER(GG_CIRCLEQ_HEAD *head, TYPE *listelm, TYPE *elm,
GG_CIRCLEQ_ENTRY NAME);
GG_CIRCLEQ_INSERT_BEFORE(GG_CIRCLEQ_HEAD *head, TYPE *listelm, TYPE *elm,
GG_CIRCLEQ_ENTRY NAME);
GG_CIRCLEQ_INSERT_HEAD(GG_CIRCLEQ_HEAD *head, TYPE *elm, GG_CIRCLEQ_ENTRY NAME);
GG_CIRCLEQ_INSERT_TAIL(GG_CIRCLEQ_HEAD *head, TYPE *elm, GG_CIRCLEQ_ENTRY NAME);
GG_CIRCLEQ_REMOVE(GG_CIRCLEQ_HEAD *head, TYPE *elm, GG_CIRCLEQ_ENTRY NAME);
GG_CIRCLEQ_FOREACH(TYPE *var, GG_CIRCLEQ_HEAD *head, GG_CIRCLEQ_ENTRY NAME);
GG_CIRCLEQ_FOREACH_REVERSE(TYPE *var, GG_CIRCLEQ_HEAD *head,
GG_CIRCLEQ_ENTRY NAME);
int
GG_CIRCLEQ_EMPTY(GG_CIRCLEQ_HEAD *head);
TYPE *
GG_CIRCLEQ_FIRST(GG_CIRCLEQ_HEAD *head);
TYPE *
GG_CIRCLEQ_LAST(GG_CIRCLEQ_HEAD *head);
TYPE *
GG_CIRCLEQ_NEXT(TYPE *elm, GG_CIRCLEQ_ENTRY NAME);
TYPE *
GG_CIRCLEQ_PREV(TYPE *elm, GG_CIRCLEQ_ENTRY NAME);
Singly-linked lists are the simplest of the five data structures and support only the above functionality. Singly-linked lists are ideal for applications with large datasets and few or no removals, or for implementing a LIFO queue.
Simple queues add the following functionality:
However:
Simple queues are ideal for applications with large datasets and few or no removals, or for implementing a FIFO queue.
All doubly linked types of data structures (lists, tail queues, and circle queues) additionally allow:
However:
Linked lists are the simplest of the doubly linked data structures and support only the above functionality over singly-linked lists.
Tail queues add the following functionality:
However:
Circular queues add the following functionality:
However:
In the macro definitions, TYPE is the name of a user defined structure, that must contain a field of type GG_LIST_ENTRY, GG_SIMPLEQ_ENTRY, GG_SLIST_ENTRY, GG_TAILQ_ENTRY, or GG_CIRCLEQ_ENTRY, named NAME. The argument HEADNAME is the name of a user defined structure that must be declared using the macros GG_LIST_HEAD, GG_SIMPLEQ_HEAD, GG_SLIST_HEAD, GG_TAILQ_HEAD, or GG_CIRCLEQ_HEAD. See the examples below for further explanation of how these macros are used.
GG_SLIST_HEAD(HEADNAME, TYPE) head;
where HEADNAME is the name of the structure to be defined, and TYPE is the type of the elements to be linked into the list. A pointer to the head of the list can later be declared as:
struct HEADNAME *headp;
(The names head and headp are user selectable.)
The macro GG_SLIST_HEAD_INITIALIZER evaluates to an initializer for the list head.
The macro GG_SLIST_EMPTY evaluates to true if there are no elements in the list.
The macro GG_SLIST_ENTRY declares a structure that connects the elements in the list.
The macro GG_SLIST_FIRST returns the first element in the list or NULL if the list is empty.
The macro GG_SLIST_FOREACH traverses the list referenced by head in the forward direction, assigning each element in turn to var.
The macro GG_SLIST_INIT initializes the list referenced by head.
The macro GG_SLIST_INSERT_HEAD inserts the new element elm at the head of the list.
The macro GG_SLIST_INSERT_AFTER inserts the new element elm after the element listelm.
The macro GG_SLIST_NEXT returns the next element in the list.
The macro GG_SLIST_REMOVE removes the element elm from the list.
The macro GG_SLIST_REMOVE_HEAD removes the first element from the head of the list. For optimum efficiency, elements being removed from the head of the list should explicitly use this macro instead of the generic GG_SLIST_REMOVE macro.
GG_SLIST_HEAD(slisthead, entry) head =
GG_SLIST_HEAD_INITIALIZER(head);
struct slisthead *headp; /* Singly-linked List head. */
struct entry {
...
GG_SLIST_ENTRY(entry) entries; /* Singly-linked List. */
...
} *n1, *n2, *n3, *np;
GG_SLIST_INIT(&head); /* Initialize the list. */
n1 = malloc(sizeof(struct entry)); /* Insert at the head. */
GG_SLIST_INSERT_HEAD(&head, n1, entries);
n2 = malloc(sizeof(struct entry)); /* Insert after. */
GG_SLIST_INSERT_AFTER(n1, n2, entries);
GG_SLIST_REMOVE(&head, n2, entry, entries);/* Deletion. */
free(n2);
n3 = GG_SLIST_FIRST(&head);
GG_SLIST_REMOVE_HEAD(&head, entries); /* Deletion from the head. */
free(n3);
/* Forward traversal. */
GG_SLIST_FOREACH(np, &head, entries)
np-> ...
while (!GG_SLIST_EMPTY(&head)) { /* List Deletion. */
n1 = GG_SLIST_FIRST(&head);
GG_SLIST_REMOVE_HEAD(&head, entries);
free(n1);
}
GG_SIMPLEQ_HEAD(HEADNAME, TYPE) head;
where HEADNAME is the name of the structure to be defined, and TYPE is the type of the elements to be linked into the simple queue. A pointer to the head of the simple queue can later be declared as:
struct HEADNAME *headp;
(The names head and headp are user selectable.)
The macro GG_SIMPLEQ_ENTRYk declares a structure that connects the elements in the simple queue.
The macro GG_SIMPLEQ_HEAD_INITIALIZER provides a value which can be used to initialize a simple queue head at compile time, and is used at the point that the simple queue head variable is declared, like:
struct HEADNAME head = GG_SIMPLEQ_HEAD_INITIALIZER(head);
The macro GG_SIMPLEQ_INIT initializes the simple queue referenced by head.
The macro GG_SIMPLEQ_INSERT_HEAD inserts the new element elm at the head of the simple queue.
The macro GG_SIMPLEQ_INSERT_TAIL inserts the new element elm at the end of the simple queue.
The macro GG_SIMPLEQ_INSERT_AFTER inserts the new element elm after the ele- ment listelm.
The macro GG_SIMPLEQ_REMOVE removes elm from the simple queue.
The macro GG_SIMPLEQ_REMOVE_HEAD removes the first element from the head of the simple queue. For optimum efficiency, elements being removed from the head of the queue should explicitly use this macro instead of the generic GG_SIMPLQ_REMOVE macro.
The macro GG_SIMPLEQ_EMPTY return true if the simple queue head has no elements.
The macro GG_SIMPLEQ_FIRST returns the first element of the simple queue head.
The macro GG_SIMPLEQ_FOREACH traverses the tail queue referenced by head in the forward direction, assigning each element in turn to var.
The macro GG_SIMPLEQ_NEXT returns the element after the element elm.
GG_SIMPLEQ_HEAD(simplehead, entry) head;
struct simplehead *headp; /* Simple queue head. */
struct entry {
...
GG_SIMPLEQ_ENTRY(entry) entries;/* Simple queue. */
...
} *n1, *n2, *np;
GG_SIMPLEQ_INIT(&head); /* Initialize the queue. */
n1 = malloc(sizeof(struct entry)); /* Insert at the head. */
GG_SIMPLEQ_INSERT_HEAD(&head, n1, entries);
n1 = malloc(sizeof(struct entry)); /* Insert at the tail. */
GG_SIMPLEQ_INSERT_TAIL(&head, n1, entries);
n2 = malloc(sizeof(struct entry)); /* Insert after. */
GG_SIMPLEQ_INSERT_AFTER(&head, n1, n2, entries);
/* Forward traversal. */
GG_SIMPLEQ_FOREACH(np, &head, entries)
np-> ...
/* Delete. */
while (GG_SIMPLEQ_FIRST(&head) != NULL)
GG_SIMPLEQ_REMOVE_HEAD(&head, entries);
if (GG_SIMPLEQ_EMPTY(&head)) /* Test for emptiness. */
printf("nothing to do\n");
GG_LIST_HEAD(HEADNAME, TYPE) head;
where HEADNAME is the name of the structure to be defined, and TYPE is the type of the elements to be linked into the list. A pointer to the head of the list can later be declared as:
struct HEADNAME *headp;
(The names head and headp are user selectable.)
The macro GG_LIST_ENTRY declares a structure that connects the elements in the list.
The macro GG_LIST_HEAD_INITIALIZER provides a value which can be used to initialize a list head at compile time, and is used at the point that the list head variable is declared, like:
struct HEADNAME head = GG_LIST_HEAD_INITIALIZER(head);
The macro GG_LIST_INIT initializes the list referenced by head.
The macro GG_LIST_INSERT_HEAD inserts the new element elm at the head of the list.
The macro GG_LIST_INSERT_AFTER inserts the new element elm after the element listelm.
The macro GG_LIST_INSERT_BEFORE inserts the new element elm before the element listelm.
The macro GG_LIST_REMOVE removes the element elm from the list.
The macro GG_LIST_EMPTY return true if the list head has no elements.
The macro GG_LIST_FIRST returns the first element of the list head.
The macro GG_LIST_FOREACH traverses the list referenced by head in the forward direction, assigning each element in turn to var.
The macro GG_LIST_NEXT returns the element after the element elm.
GG_LIST_HEAD(listhead, entry) head;
struct listhead *headp; /* List head. */
struct entry {
...
GG_LIST_ENTRY(entry) entries; /* List. */
...
} *n1, *n2, *np;
GG_LIST_INIT(&head); /* Initialize the list. */
n1 = malloc(sizeof(struct entry)); /* Insert at the head. */
GG_LIST_INSERT_HEAD(&head, n1, entries);
n2 = malloc(sizeof(struct entry)); /* Insert after. */
GG_LIST_INSERT_AFTER(n1, n2, entries);
n2 = malloc(sizeof(struct entry)); /* Insert before. */
GG_LIST_INSERT_BEFORE(n1, n2, entries);
/* Forward traversal. */
GG_LIST_FOREACH(np, &head, entries)
np-> ...
/* Delete. */
while (GG_LIST_FIRST(&head) != NULL)
GG_LIST_REMOVE(LIST_FIRST(&head), entries);
if (GG_LIST_EMPTY(&head)) /* Test for emptiness. */
printf("nothing to do\n");
TAILQ_HEAD(HEADNAME, TYPE) head;
where HEADNAME is the name of the structure to be defined, and TYPE is the type of the elements to be linked into the tail queue. A pointer to the head of the tail queue can later be declared as:
struct HEADNAME *headp;
(The names head and headp are user selectable.)
The macro GG_TAILQ_ENTRY declares a structure that connects the elements in the tail queue.
The macro GG_TAILQ_HEAD_INITIALIZER provides a value which can be used to initialize a tail queue head at compile time, and is used at the point that the tail queue head variable is declared, like:
struct HEADNAME head = GG_TAILQ_HEAD_INITIALIZER(head);
The macro GG_TAILQ_INIT initializes the tail queue referenced by head.
The macro GG_TAILQ_INSERT_HEAD inserts the new element elm at the head of the tail queue.
The macro GG_TAILQ_INSERT_TAIL inserts the new element elm at the end of the tail queue.
The macro GG_TAILQ_INSERT_AFTER inserts the new element elm after the element listelm.
The macro GG_TAILQ_INSERT_BEFORE inserts the new element elm before the element listelm.
The macro GG_TAILQ_REMOVE removes the element elm from the tail queue.
The macro GG_TAILQ_EMPTY return true if the tail queue head has no elements.
The macro GG_TAILQ_FIRST returns the first element of the tail queue head.
The macro GG_TAILQ_FOREACH traverses the tail queue referenced by head in the forward direction, assigning each element in turn to var.
The macro GG_TAILQ_FOREACH_REVERSE traverses the tail queue referenced by head in the reverse direction, assigning each element in turn to var.
The macro GG_TAILQ_NEXT returns the element after the element elm
GG_TAILQ_HEAD(tailhead, entry) head;
struct tailhead *headp; /* Tail queue head. */
struct entry {
...
GG_TAILQ_ENTRY(entry) entries; /* Tail queue. */
...
} *n1, *n2, *np;
GG_TAILQ_INIT(&head); /* Initialize the queue. */
n1 = malloc(sizeof(struct entry)); /* Insert at the head. */
GG_TAILQ_INSERT_HEAD(&head, n1, entries);
n1 = malloc(sizeof(struct entry)); /* Insert at the tail. */
GG_TAILQ_INSERT_TAIL(&head, n1, entries);
n2 = malloc(sizeof(struct entry)); /* Insert after. */
GG_TAILQ_INSERT_AFTER(&head, n1, n2, entries);
n2 = malloc(sizeof(struct entry)); /* Insert before. */
GG_TAILQ_INSERT_BEFORE(n1, n2, entries);
/* Forward traversal. */
GG_TAILQ_FOREACH(np, &head, entries)
np-> ...
/* Reverse traversal. */
GG_TAILQ_FOREACH_REVERSE(np, &head, tailhead, entries)
np-> ...
/* Delete. */
while (GG_TAILQ_FIRST(&head) != NULL)
GG_TAILQ_REMOVE(&head, GG_TAILQ_FIRST(&head), entries);
if (GG_TAILQ_EMPTY(&head)) /* Test for emptiness. */
printf("nothing to do\n");
GG_CIRCLEQ_HEAD(HEADNAME, TYPE) head;
where HEADNAME is the name of the structure to be defined, and TYPE is the type of the elements to be linked into the circular queue. A pointer to the head of the circular queue can later be declared as:
struct HEADNAME *headp;
(The names head and headp are user selectable.)
The macro GG_CIRCLEQ_ENTRY declares a structure that connects the elements in the circular queue.
The macro GG_CIRCLEQ_HEAD_INITIALIZER provides a value which can be used to initialize a circular queue head at compile time, and is used at the point that the circular queue head variable is declared, like:
struct HEADNAME head = GG_CIRCLEQ_HEAD_INITIALIZER(head);
The macro GG_CIRCLEQ_INIT initializes the circular queue referenced by head.
The macro GG_CIRCLEQ_INSERT_HEAD inserts the new element elm at the head of the circular queue.
The macro GG_CIRCLEQ_INSERT_TAIL inserts the new element elm at the end of the circular queue.
The macro GG_CIRCLEQ_INSERT_AFTER inserts the new element elm after the element listelm.
The macro GG_CIRCLEQ_INSERT_BEFORE inserts the new element elm before the element listelm.
The macro GG_CIRCLEQ_REMOVE removes the element elm from the circular queue.
The macro GG_CIRCLEQ_EMPTY return true if the circular queue head has no elements.
The macro GG_CIRCLEQ_FIRST returns the first element of the circular queue head.
The macro GG_CICRLEQ_FOREACH traverses the circle queue referenced by head in the forward direction, assigning each element in turn to var.
The macro GG_CICRLEQ_FOREACH_REVERSE traverses the circle queue referenced by head in the reverse direction, assigning each element in turn to var.
The macro GG_CIRCLEQ_LAST returns the last element of the circular queue head.
The macro GG_CIRCLEQ_NEXT returns the element after the element elm.
The macro GG_CIRCLEQ_PREV returns the element before the element elm.
GG_CIRCLEQ_HEAD(circleq, entry) head;
struct circleq *headp; /* Circular queue head. */
struct entry {
...
GG_CIRCLEQ_ENTRY(entry) entries; /* Circular queue. */
...
} *n1, *n2, *np;
GG_CIRCLEQ_INIT(&head); /* Initialize the circular queue. */
n1 = malloc(sizeof(struct entry)); /* Insert at the head. */
GG_CIRCLEQ_INSERT_HEAD(&head, n1, entries);
n1 = malloc(sizeof(struct entry)); /* Insert at the tail. */
GG_CIRCLEQ_INSERT_TAIL(&head, n1, entries);
n2 = malloc(sizeof(struct entry)); /* Insert after. */
GG_CIRCLEQ_INSERT_AFTER(&head, n1, n2, entries);
n2 = malloc(sizeof(struct entry)); /* Insert before. */
GG_CIRCLEQ_INSERT_BEFORE(&head, n1, n2, entries);
/* Forward traversal. */
GG_CIRCLEQ_FOREACH(np, &head, entries)
np-> ...
/* Reverse traversal. */
GG_CIRCLEQ_FOREACH_REVERSE(np, &head, entries)
np-> ...
/* Delete. */
while (GG_CIRCLEQ_FIRST(&head) != (void *)&head)
GG_CIRCLEQ_REMOVE(&head, GG_CIRCLEQ_FIRST(&head), entries);
if (GG_CIRCLEQ_EMPTY(&head)) /* Test for emptiness. */
printf("nothing to do\n");