266 lines
8.5 KiB
C
266 lines
8.5 KiB
C
#ifndef _QUEUE_H_
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#define _QUEUE_H_
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#include <ptdef.h>
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#define _Q_INVALIDATE(a)
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/*
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* Tail queue definitions.
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*/
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#define TAILQ_HEAD(name, type) \
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struct name { \
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struct type *tqh_first; /* first element */ \
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struct type **tqh_last; /* addr of last next element */ \
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USIZE nelem; /* Number of elements */ \
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}
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#define TAILQ_HEAD_INITIALIZER(head) \
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{ NULL, &(head).tqh_first }
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#define TAILQ_ENTRY(type) \
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struct { \
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struct type *tqe_next; /* next element */ \
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struct type **tqe_prev; /* address of previous next element */ \
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}
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/*
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* Tail queue access methods.
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*/
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#define TAILQ_NELEM(head) ((head)->nelem)
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#define TAILQ_FIRST(head) ((head)->tqh_first)
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#define TAILQ_END(head) NULL
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#define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
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#define TAILQ_LAST(head, headname) \
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(*(((struct headname *)((head)->tqh_last))->tqh_last))
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/* XXX */
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#define TAILQ_PREV(elm, headname, field) \
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(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
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#define TAILQ_EMPTY(head) \
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(TAILQ_FIRST(head) == TAILQ_END(head))
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#define TAILQ_FOREACH(var, head, field) \
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for((var) = TAILQ_FIRST(head); \
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(var) != TAILQ_END(head); \
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(var) = TAILQ_NEXT(var, field))
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#define TAILQ_FOREACH_SAFE(var, head, field, tvar) \
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for ((var) = TAILQ_FIRST(head); \
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(var) != TAILQ_END(head) && \
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((tvar) = TAILQ_NEXT(var, field), 1); \
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(var) = (tvar))
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#define TAILQ_FOREACH_REVERSE(var, head, headname, field) \
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for((var) = TAILQ_LAST(head, headname); \
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(var) != TAILQ_END(head); \
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(var) = TAILQ_PREV(var, headname, field))
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#define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar) \
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for ((var) = TAILQ_LAST(head, headname); \
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(var) != TAILQ_END(head) && \
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((tvar) = TAILQ_PREV(var, headname, field), 1); \
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(var) = (tvar))
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/*
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* Tail queue functions.
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*/
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#define TAILQ_INIT(head) do { \
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(head)->tqh_first = NULL; \
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(head)->tqh_last = &(head)->tqh_first; \
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(head)->nelem = 0; \
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} while (0)
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#define TAILQ_INSERT_HEAD(head, elm, field) do { \
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if (((elm)->field.tqe_next = (head)->tqh_first) != NULL) \
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(head)->tqh_first->field.tqe_prev = \
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&(elm)->field.tqe_next; \
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else \
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(head)->tqh_last = &(elm)->field.tqe_next; \
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(head)->tqh_first = (elm); \
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(elm)->field.tqe_prev = &(head)->tqh_first; \
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++(head)->nelem; \
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} while (0)
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#define TAILQ_INSERT_TAIL(head, elm, field) do { \
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(elm)->field.tqe_next = NULL; \
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(elm)->field.tqe_prev = (head)->tqh_last; \
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*(head)->tqh_last = (elm); \
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(head)->tqh_last = &(elm)->field.tqe_next; \
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++(head)->nelem; \
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} while (0)
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#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
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if (((elm)->field.tqe_next = (listelm)->field.tqe_next) != NULL)\
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(elm)->field.tqe_next->field.tqe_prev = \
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&(elm)->field.tqe_next; \
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else \
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(head)->tqh_last = &(elm)->field.tqe_next; \
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(listelm)->field.tqe_next = (elm); \
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(elm)->field.tqe_prev = &(listelm)->field.tqe_next; \
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++(head)->nelem; \
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} while (0)
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#define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
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(elm)->field.tqe_prev = (listelm)->field.tqe_prev; \
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(elm)->field.tqe_next = (listelm); \
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*(listelm)->field.tqe_prev = (elm); \
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(listelm)->field.tqe_prev = &(elm)->field.tqe_next; \
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++(head)->nelem; \
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} while (0)
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#define TAILQ_REMOVE(head, elm, field) do { \
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if (((elm)->field.tqe_next) != NULL) \
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(elm)->field.tqe_next->field.tqe_prev = \
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(elm)->field.tqe_prev; \
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else \
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(head)->tqh_last = (elm)->field.tqe_prev; \
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*(elm)->field.tqe_prev = (elm)->field.tqe_next; \
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_Q_INVALIDATE((elm)->field.tqe_prev); \
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_Q_INVALIDATE((elm)->field.tqe_next); \
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--(head)->nelem; \
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} while (0)
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#define TAILQ_REPLACE(head, elm, elm2, field) do { \
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if (((elm2)->field.tqe_next = (elm)->field.tqe_next) != NULL) \
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(elm2)->field.tqe_next->field.tqe_prev = \
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&(elm2)->field.tqe_next; \
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else \
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(head)->tqh_last = &(elm2)->field.tqe_next; \
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(elm2)->field.tqe_prev = (elm)->field.tqe_prev; \
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*(elm2)->field.tqe_prev = (elm2); \
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_Q_INVALIDATE((elm)->field.tqe_prev); \
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_Q_INVALIDATE((elm)->field.tqe_next); \
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} while (0)
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#define TAILQ_CONCAT(head1, head2, field) do { \
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if (!TAILQ_EMPTY(head2)) { \
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*(head1)->tqh_last = (head2)->tqh_first; \
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(head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \
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(head1)->tqh_last = (head2)->tqh_last; \
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TAILQ_INIT((head2)); \
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} \
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} while (0)
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/*
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* List definitions.
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*/
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#define LIST_HEAD(name, type) \
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struct name { \
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struct type *lh_first; /* first element */ \
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}
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#define LIST_HEAD_INITIALIZER(head) \
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{ NULL }
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#define LIST_ENTRY(type) \
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struct { \
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struct type *le_next; /* next element */ \
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struct type **le_prev; /* address of previous next element */ \
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}
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/*
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* List access methods.
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*/
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#define LIST_FIRST(head) ((head)->lh_first)
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#define LIST_END(head) NULL
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#define LIST_EMPTY(head) ((head)->lh_first == LIST_END(head))
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#define LIST_NEXT(elm, field) ((elm)->field.le_next)
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#define LIST_FOREACH(var, head, field) \
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for ((var) = ((head)->lh_first); \
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(var) != LIST_END(head); \
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(var) = ((var)->field.le_next))
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#define LIST_FOREACH_SAFE(var, head, field, tvar) \
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for ((var) = LIST_FIRST((head)); \
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(var) != LIST_END(head) && \
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((tvar) = LIST_NEXT((var), field), 1); \
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(var) = (tvar))
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#define LIST_MOVE(head1, head2, field) do { \
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LIST_INIT((head2)); \
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if (!LIST_EMPTY((head1))) { \
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(head2)->lh_first = (head1)->lh_first; \
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(head2)->lh_first->field.le_prev = &(head2)->lh_first; \
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LIST_INIT((head1)); \
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} \
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} while (0)
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/*
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* List functions.
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*/
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#if defined(QUEUEDEBUG)
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#define QUEUEDEBUG_LIST_INSERT_HEAD(head, elm, field) \
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if ((head)->lh_first && \
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(head)->lh_first->field.le_prev != &(head)->lh_first) \
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QUEUEDEBUG_ABORT("LIST_INSERT_HEAD %p %s:%d", (head), \
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__FILE__, __LINE__);
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#define QUEUEDEBUG_LIST_OP(elm, field) \
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if ((elm)->field.le_next && \
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(elm)->field.le_next->field.le_prev != \
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&(elm)->field.le_next) \
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QUEUEDEBUG_ABORT("LIST_* forw %p %s:%d", (elm), \
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__FILE__, __LINE__); \
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if (*(elm)->field.le_prev != (elm)) \
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QUEUEDEBUG_ABORT("LIST_* back %p %s:%d", (elm), \
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__FILE__, __LINE__);
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#define QUEUEDEBUG_LIST_POSTREMOVE(elm, field) \
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(elm)->field.le_next = (void *)1L; \
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(elm)->field.le_prev = (void *)1L;
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#else
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#define QUEUEDEBUG_LIST_INSERT_HEAD(head, elm, field)
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#define QUEUEDEBUG_LIST_OP(elm, field)
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#define QUEUEDEBUG_LIST_POSTREMOVE(elm, field)
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#endif
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#define LIST_INIT(head) do { \
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(head)->lh_first = LIST_END(head); \
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} while (0)
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#define LIST_INSERT_AFTER(listelm, elm, field) do { \
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QUEUEDEBUG_LIST_OP((listelm), field) \
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if (((elm)->field.le_next = (listelm)->field.le_next) != \
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LIST_END(head)) \
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(listelm)->field.le_next->field.le_prev = \
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&(elm)->field.le_next; \
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(listelm)->field.le_next = (elm); \
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(elm)->field.le_prev = &(listelm)->field.le_next; \
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} while (0)
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#define LIST_INSERT_BEFORE(listelm, elm, field) do { \
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QUEUEDEBUG_LIST_OP((listelm), field) \
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(elm)->field.le_prev = (listelm)->field.le_prev; \
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(elm)->field.le_next = (listelm); \
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*(listelm)->field.le_prev = (elm); \
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(listelm)->field.le_prev = &(elm)->field.le_next; \
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} while (0)
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#define LIST_INSERT_HEAD(head, elm, field) do { \
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QUEUEDEBUG_LIST_INSERT_HEAD((head), (elm), field) \
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if (((elm)->field.le_next = (head)->lh_first) != LIST_END(head))\
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(head)->lh_first->field.le_prev = &(elm)->field.le_next;\
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(head)->lh_first = (elm); \
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(elm)->field.le_prev = &(head)->lh_first; \
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} while (0)
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#define LIST_REMOVE(elm, field) do { \
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QUEUEDEBUG_LIST_OP((elm), field) \
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if ((elm)->field.le_next != NULL) \
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(elm)->field.le_next->field.le_prev = \
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(elm)->field.le_prev; \
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*(elm)->field.le_prev = (elm)->field.le_next; \
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QUEUEDEBUG_LIST_POSTREMOVE((elm), field) \
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} while (0)
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#define LIST_REPLACE(elm, elm2, field) do { \
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if (((elm2)->field.le_next = (elm)->field.le_next) != NULL) \
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(elm2)->field.le_next->field.le_prev = \
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&(elm2)->field.le_next; \
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(elm2)->field.le_prev = (elm)->field.le_prev; \
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*(elm2)->field.le_prev = (elm2); \
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QUEUEDEBUG_LIST_POSTREMOVE((elm), field) \
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} while (0)
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#endif /* !_QUEUE_H_ */
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