eal/windows: complete queue.h data structures
Limited version imported previously lacks at least SLIST macros. Import a complete file from FreeBSD, since its license exception is already approved by Technical Board. Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
This commit is contained in:
Dmitry Kozlyuk
Thomas Monjalon
parent
5690607879
commit
b831cfd23a
@ -8,7 +8,36 @@
|
||||
#define _SYS_QUEUE_H_
|
||||
|
||||
/*
|
||||
* This file defines tail queues.
|
||||
* This file defines four types of data structures: singly-linked lists,
|
||||
* singly-linked tail queues, lists and tail queues.
|
||||
*
|
||||
* A singly-linked list is headed by a single forward pointer. The elements
|
||||
* are singly linked for minimum space and pointer manipulation overhead at
|
||||
* the expense of O(n) removal for arbitrary elements. New elements can be
|
||||
* added to the list after an existing element or at the head of the list.
|
||||
* Elements being removed from the head of the list should use the explicit
|
||||
* macro for this purpose for optimum efficiency. A singly-linked list may
|
||||
* only be traversed in the forward direction. Singly-linked lists are ideal
|
||||
* for applications with large datasets and few or no removals or for
|
||||
* implementing a LIFO queue.
|
||||
*
|
||||
* A singly-linked tail queue is headed by a pair of pointers, one to the
|
||||
* head of the list and the other to the tail of the list. The elements are
|
||||
* singly linked for minimum space and pointer manipulation overhead at the
|
||||
* expense of O(n) removal for arbitrary elements. New elements can be added
|
||||
* to the list after an existing element, at the head of the list, or at the
|
||||
* end of the list. Elements being removed from the head of the tail queue
|
||||
* should use the explicit macro for this purpose for optimum efficiency.
|
||||
* A singly-linked tail queue may only be traversed in the forward direction.
|
||||
* Singly-linked tail queues are ideal for applications with large datasets
|
||||
* and few or no removals or for implementing a FIFO queue.
|
||||
*
|
||||
* A list is headed by a single forward pointer (or an array of forward
|
||||
* pointers for a hash table header). The elements are doubly linked
|
||||
* so that an arbitrary element can be removed without a need to
|
||||
* traverse the list. New elements can be added to the list before
|
||||
* or after an existing element or at the head of the list. A list
|
||||
* may be traversed in either direction.
|
||||
*
|
||||
* A tail queue is headed by a pair of pointers, one to the head of the
|
||||
* list and the other to the tail of the list. The elements are doubly
|
||||
@ -17,65 +46,93 @@
|
||||
* after an existing element, at the head of the list, or at the end of
|
||||
* the list. A tail queue may be traversed in either direction.
|
||||
*
|
||||
* For details on the use of these macros, see the queue(3) manual page.
|
||||
*
|
||||
* Below is a summary of implemented functions where:
|
||||
* + means the macro is available
|
||||
* - means the macro is not available
|
||||
* s means the macro is available but is slow (runs in O(n) time)
|
||||
*
|
||||
* TAILQ
|
||||
* _HEAD +
|
||||
* _CLASS_HEAD +
|
||||
* _HEAD_INITIALIZER +
|
||||
* _ENTRY +
|
||||
* _CLASS_ENTRY +
|
||||
* _INIT +
|
||||
* _EMPTY +
|
||||
* _FIRST +
|
||||
* _NEXT +
|
||||
* _PREV +
|
||||
* _LAST +
|
||||
* _LAST_FAST +
|
||||
* _FOREACH +
|
||||
* _FOREACH_FROM +
|
||||
* _FOREACH_SAFE +
|
||||
* _FOREACH_FROM_SAFE +
|
||||
* _FOREACH_REVERSE +
|
||||
* _FOREACH_REVERSE_FROM +
|
||||
* _FOREACH_REVERSE_SAFE +
|
||||
* _FOREACH_REVERSE_FROM_SAFE +
|
||||
* _INSERT_HEAD +
|
||||
* _INSERT_BEFORE +
|
||||
* _INSERT_AFTER +
|
||||
* _INSERT_TAIL +
|
||||
* _CONCAT +
|
||||
* _REMOVE_AFTER -
|
||||
* _REMOVE_HEAD -
|
||||
* _REMOVE +
|
||||
* _SWAP +
|
||||
* SLIST LIST STAILQ TAILQ
|
||||
* _HEAD + + + +
|
||||
* _CLASS_HEAD + + + +
|
||||
* _HEAD_INITIALIZER + + + +
|
||||
* _ENTRY + + + +
|
||||
* _CLASS_ENTRY + + + +
|
||||
* _INIT + + + +
|
||||
* _EMPTY + + + +
|
||||
* _FIRST + + + +
|
||||
* _NEXT + + + +
|
||||
* _PREV - + - +
|
||||
* _LAST - - + +
|
||||
* _LAST_FAST - - - +
|
||||
* _FOREACH + + + +
|
||||
* _FOREACH_FROM + + + +
|
||||
* _FOREACH_SAFE + + + +
|
||||
* _FOREACH_FROM_SAFE + + + +
|
||||
* _FOREACH_REVERSE - - - +
|
||||
* _FOREACH_REVERSE_FROM - - - +
|
||||
* _FOREACH_REVERSE_SAFE - - - +
|
||||
* _FOREACH_REVERSE_FROM_SAFE - - - +
|
||||
* _INSERT_HEAD + + + +
|
||||
* _INSERT_BEFORE - + - +
|
||||
* _INSERT_AFTER + + + +
|
||||
* _INSERT_TAIL - - + +
|
||||
* _CONCAT s s + +
|
||||
* _REMOVE_AFTER + - + -
|
||||
* _REMOVE_HEAD + - + -
|
||||
* _REMOVE s + s +
|
||||
* _SWAP + + + +
|
||||
*
|
||||
*/
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#ifdef QUEUE_MACRO_DEBUG
|
||||
#warn Use QUEUE_MACRO_DEBUG_TRACE and/or QUEUE_MACRO_DEBUG_TRASH
|
||||
#define QUEUE_MACRO_DEBUG_TRACE
|
||||
#define QUEUE_MACRO_DEBUG_TRASH
|
||||
#endif
|
||||
|
||||
/*
|
||||
* List definitions.
|
||||
*/
|
||||
#define LIST_HEAD(name, type) \
|
||||
struct name { \
|
||||
struct type *lh_first; /* first element */ \
|
||||
}
|
||||
#ifdef QUEUE_MACRO_DEBUG_TRACE
|
||||
/* Store the last 2 places the queue element or head was altered */
|
||||
struct qm_trace {
|
||||
unsigned long lastline;
|
||||
unsigned long prevline;
|
||||
const char *lastfile;
|
||||
const char *prevfile;
|
||||
};
|
||||
|
||||
#define TRACEBUF struct qm_trace trace;
|
||||
#define TRACEBUF_INITIALIZER { __LINE__, 0, __FILE__, NULL } ,
|
||||
|
||||
#define QMD_TRACE_HEAD(head) do { \
|
||||
(head)->trace.prevline = (head)->trace.lastline; \
|
||||
(head)->trace.prevfile = (head)->trace.lastfile; \
|
||||
(head)->trace.lastline = __LINE__; \
|
||||
(head)->trace.lastfile = __FILE__; \
|
||||
} while (0)
|
||||
|
||||
#define QMD_TRACE_ELEM(elem) do { \
|
||||
(elem)->trace.prevline = (elem)->trace.lastline; \
|
||||
(elem)->trace.prevfile = (elem)->trace.lastfile; \
|
||||
(elem)->trace.lastline = __LINE__; \
|
||||
(elem)->trace.lastfile = __FILE__; \
|
||||
} while (0)
|
||||
|
||||
#else /* !QUEUE_MACRO_DEBUG_TRACE */
|
||||
#define QMD_TRACE_ELEM(elem)
|
||||
#define QMD_TRACE_HEAD(head)
|
||||
#define TRACEBUF
|
||||
#define TRACEBUF_INITIALIZER
|
||||
#endif /* QUEUE_MACRO_DEBUG_TRACE */
|
||||
|
||||
#ifdef QUEUE_MACRO_DEBUG_TRASH
|
||||
#define QMD_SAVELINK(name, link) void **name = (void *)&(link)
|
||||
#define TRASHIT(x) do {(x) = (void *)-1;} while (0)
|
||||
#define QMD_IS_TRASHED(x) ((x) == (void *)(intptr_t)-1)
|
||||
#else /* !QUEUE_MACRO_DEBUG_TRASH */
|
||||
#define QMD_SAVELINK(name, link)
|
||||
#define TRASHIT(x)
|
||||
#define QMD_IS_TRASHED(x) 0
|
||||
|
||||
#define QMD_SAVELINK(name, link)
|
||||
#endif /* QUEUE_MACRO_DEBUG_TRASH */
|
||||
|
||||
#ifdef __cplusplus
|
||||
/*
|
||||
@ -86,6 +143,445 @@ struct name { \
|
||||
#define QUEUE_TYPEOF(type) struct type
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Singly-linked List declarations.
|
||||
*/
|
||||
#define SLIST_HEAD(name, type) \
|
||||
struct name { \
|
||||
struct type *slh_first; /* first element */ \
|
||||
}
|
||||
|
||||
#define SLIST_CLASS_HEAD(name, type) \
|
||||
struct name { \
|
||||
class type *slh_first; /* first element */ \
|
||||
}
|
||||
|
||||
#define SLIST_HEAD_INITIALIZER(head) \
|
||||
{ NULL }
|
||||
|
||||
#define SLIST_ENTRY(type) \
|
||||
struct { \
|
||||
struct type *sle_next; /* next element */ \
|
||||
}
|
||||
|
||||
#define SLIST_CLASS_ENTRY(type) \
|
||||
struct { \
|
||||
class type *sle_next; /* next element */ \
|
||||
}
|
||||
|
||||
/*
|
||||
* Singly-linked List functions.
|
||||
*/
|
||||
#if (defined(_KERNEL) && defined(INVARIANTS))
|
||||
#define QMD_SLIST_CHECK_PREVPTR(prevp, elm) do { \
|
||||
if (*(prevp) != (elm)) \
|
||||
panic("Bad prevptr *(%p) == %p != %p", \
|
||||
(prevp), *(prevp), (elm)); \
|
||||
} while (0)
|
||||
#else
|
||||
#define QMD_SLIST_CHECK_PREVPTR(prevp, elm)
|
||||
#endif
|
||||
|
||||
#define SLIST_CONCAT(head1, head2, type, field) do { \
|
||||
QUEUE_TYPEOF(type) *curelm = SLIST_FIRST(head1); \
|
||||
if (curelm == NULL) { \
|
||||
if ((SLIST_FIRST(head1) = SLIST_FIRST(head2)) != NULL) \
|
||||
SLIST_INIT(head2); \
|
||||
} else if (SLIST_FIRST(head2) != NULL) { \
|
||||
while (SLIST_NEXT(curelm, field) != NULL) \
|
||||
curelm = SLIST_NEXT(curelm, field); \
|
||||
SLIST_NEXT(curelm, field) = SLIST_FIRST(head2); \
|
||||
SLIST_INIT(head2); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
#define SLIST_EMPTY(head) ((head)->slh_first == NULL)
|
||||
|
||||
#define SLIST_FIRST(head) ((head)->slh_first)
|
||||
|
||||
#define SLIST_FOREACH(var, head, field) \
|
||||
for ((var) = SLIST_FIRST((head)); \
|
||||
(var); \
|
||||
(var) = SLIST_NEXT((var), field))
|
||||
|
||||
#define SLIST_FOREACH_FROM(var, head, field) \
|
||||
for ((var) = ((var) ? (var) : SLIST_FIRST((head))); \
|
||||
(var); \
|
||||
(var) = SLIST_NEXT((var), field))
|
||||
|
||||
#define SLIST_FOREACH_SAFE(var, head, field, tvar) \
|
||||
for ((var) = SLIST_FIRST((head)); \
|
||||
(var) && ((tvar) = SLIST_NEXT((var), field), 1); \
|
||||
(var) = (tvar))
|
||||
|
||||
#define SLIST_FOREACH_FROM_SAFE(var, head, field, tvar) \
|
||||
for ((var) = ((var) ? (var) : SLIST_FIRST((head))); \
|
||||
(var) && ((tvar) = SLIST_NEXT((var), field), 1); \
|
||||
(var) = (tvar))
|
||||
|
||||
#define SLIST_FOREACH_PREVPTR(var, varp, head, field) \
|
||||
for ((varp) = &SLIST_FIRST((head)); \
|
||||
((var) = *(varp)) != NULL; \
|
||||
(varp) = &SLIST_NEXT((var), field))
|
||||
|
||||
#define SLIST_INIT(head) do { \
|
||||
SLIST_FIRST((head)) = NULL; \
|
||||
} while (0)
|
||||
|
||||
#define SLIST_INSERT_AFTER(slistelm, elm, field) do { \
|
||||
SLIST_NEXT((elm), field) = SLIST_NEXT((slistelm), field); \
|
||||
SLIST_NEXT((slistelm), field) = (elm); \
|
||||
} while (0)
|
||||
|
||||
#define SLIST_INSERT_HEAD(head, elm, field) do { \
|
||||
SLIST_NEXT((elm), field) = SLIST_FIRST((head)); \
|
||||
SLIST_FIRST((head)) = (elm); \
|
||||
} while (0)
|
||||
|
||||
#define SLIST_NEXT(elm, field) ((elm)->field.sle_next)
|
||||
|
||||
#define SLIST_REMOVE(head, elm, type, field) do { \
|
||||
QMD_SAVELINK(oldnext, (elm)->field.sle_next); \
|
||||
if (SLIST_FIRST((head)) == (elm)) { \
|
||||
SLIST_REMOVE_HEAD((head), field); \
|
||||
} \
|
||||
else { \
|
||||
QUEUE_TYPEOF(type) *curelm = SLIST_FIRST(head); \
|
||||
while (SLIST_NEXT(curelm, field) != (elm)) \
|
||||
curelm = SLIST_NEXT(curelm, field); \
|
||||
SLIST_REMOVE_AFTER(curelm, field); \
|
||||
} \
|
||||
TRASHIT(*oldnext); \
|
||||
} while (0)
|
||||
|
||||
#define SLIST_REMOVE_AFTER(elm, field) do { \
|
||||
SLIST_NEXT(elm, field) = \
|
||||
SLIST_NEXT(SLIST_NEXT(elm, field), field); \
|
||||
} while (0)
|
||||
|
||||
#define SLIST_REMOVE_HEAD(head, field) do { \
|
||||
SLIST_FIRST((head)) = SLIST_NEXT(SLIST_FIRST((head)), field); \
|
||||
} while (0)
|
||||
|
||||
#define SLIST_REMOVE_PREVPTR(prevp, elm, field) do { \
|
||||
QMD_SLIST_CHECK_PREVPTR(prevp, elm); \
|
||||
*(prevp) = SLIST_NEXT(elm, field); \
|
||||
TRASHIT((elm)->field.sle_next); \
|
||||
} while (0)
|
||||
|
||||
#define SLIST_SWAP(head1, head2, type) do { \
|
||||
QUEUE_TYPEOF(type) *swap_first = SLIST_FIRST(head1); \
|
||||
SLIST_FIRST(head1) = SLIST_FIRST(head2); \
|
||||
SLIST_FIRST(head2) = swap_first; \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* Singly-linked Tail queue declarations.
|
||||
*/
|
||||
#define STAILQ_HEAD(name, type) \
|
||||
struct name { \
|
||||
struct type *stqh_first;/* first element */ \
|
||||
struct type **stqh_last;/* addr of last next element */ \
|
||||
}
|
||||
|
||||
#define STAILQ_CLASS_HEAD(name, type) \
|
||||
struct name { \
|
||||
class type *stqh_first; /* first element */ \
|
||||
class type **stqh_last; /* addr of last next element */ \
|
||||
}
|
||||
|
||||
#define STAILQ_HEAD_INITIALIZER(head) \
|
||||
{ NULL, &(head).stqh_first }
|
||||
|
||||
#define STAILQ_ENTRY(type) \
|
||||
struct { \
|
||||
struct type *stqe_next; /* next element */ \
|
||||
}
|
||||
|
||||
#define STAILQ_CLASS_ENTRY(type) \
|
||||
struct { \
|
||||
class type *stqe_next; /* next element */ \
|
||||
}
|
||||
|
||||
/*
|
||||
* Singly-linked Tail queue functions.
|
||||
*/
|
||||
#define STAILQ_CONCAT(head1, head2) do { \
|
||||
if (!STAILQ_EMPTY((head2))) { \
|
||||
*(head1)->stqh_last = (head2)->stqh_first; \
|
||||
(head1)->stqh_last = (head2)->stqh_last; \
|
||||
STAILQ_INIT((head2)); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
#define STAILQ_EMPTY(head) ((head)->stqh_first == NULL)
|
||||
|
||||
#define STAILQ_FIRST(head) ((head)->stqh_first)
|
||||
|
||||
#define STAILQ_FOREACH(var, head, field) \
|
||||
for((var) = STAILQ_FIRST((head)); \
|
||||
(var); \
|
||||
(var) = STAILQ_NEXT((var), field))
|
||||
|
||||
#define STAILQ_FOREACH_FROM(var, head, field) \
|
||||
for ((var) = ((var) ? (var) : STAILQ_FIRST((head))); \
|
||||
(var); \
|
||||
(var) = STAILQ_NEXT((var), field))
|
||||
|
||||
#define STAILQ_FOREACH_SAFE(var, head, field, tvar) \
|
||||
for ((var) = STAILQ_FIRST((head)); \
|
||||
(var) && ((tvar) = STAILQ_NEXT((var), field), 1); \
|
||||
(var) = (tvar))
|
||||
|
||||
#define STAILQ_FOREACH_FROM_SAFE(var, head, field, tvar) \
|
||||
for ((var) = ((var) ? (var) : STAILQ_FIRST((head))); \
|
||||
(var) && ((tvar) = STAILQ_NEXT((var), field), 1); \
|
||||
(var) = (tvar))
|
||||
|
||||
#define STAILQ_INIT(head) do { \
|
||||
STAILQ_FIRST((head)) = NULL; \
|
||||
(head)->stqh_last = &STAILQ_FIRST((head)); \
|
||||
} while (0)
|
||||
|
||||
#define STAILQ_INSERT_AFTER(head, tqelm, elm, field) do { \
|
||||
if ((STAILQ_NEXT((elm), field) = STAILQ_NEXT((tqelm), field)) == NULL)\
|
||||
(head)->stqh_last = &STAILQ_NEXT((elm), field); \
|
||||
STAILQ_NEXT((tqelm), field) = (elm); \
|
||||
} while (0)
|
||||
|
||||
#define STAILQ_INSERT_HEAD(head, elm, field) do { \
|
||||
if ((STAILQ_NEXT((elm), field) = STAILQ_FIRST((head))) == NULL) \
|
||||
(head)->stqh_last = &STAILQ_NEXT((elm), field); \
|
||||
STAILQ_FIRST((head)) = (elm); \
|
||||
} while (0)
|
||||
|
||||
#define STAILQ_INSERT_TAIL(head, elm, field) do { \
|
||||
STAILQ_NEXT((elm), field) = NULL; \
|
||||
*(head)->stqh_last = (elm); \
|
||||
(head)->stqh_last = &STAILQ_NEXT((elm), field); \
|
||||
} while (0)
|
||||
|
||||
#define STAILQ_LAST(head, type, field) \
|
||||
(STAILQ_EMPTY((head)) ? NULL : \
|
||||
__containerof((head)->stqh_last, \
|
||||
QUEUE_TYPEOF(type), field.stqe_next))
|
||||
|
||||
#define STAILQ_NEXT(elm, field) ((elm)->field.stqe_next)
|
||||
|
||||
#define STAILQ_REMOVE(head, elm, type, field) do { \
|
||||
QMD_SAVELINK(oldnext, (elm)->field.stqe_next); \
|
||||
if (STAILQ_FIRST((head)) == (elm)) { \
|
||||
STAILQ_REMOVE_HEAD((head), field); \
|
||||
} \
|
||||
else { \
|
||||
QUEUE_TYPEOF(type) *curelm = STAILQ_FIRST(head); \
|
||||
while (STAILQ_NEXT(curelm, field) != (elm)) \
|
||||
curelm = STAILQ_NEXT(curelm, field); \
|
||||
STAILQ_REMOVE_AFTER(head, curelm, field); \
|
||||
} \
|
||||
TRASHIT(*oldnext); \
|
||||
} while (0)
|
||||
|
||||
#define STAILQ_REMOVE_AFTER(head, elm, field) do { \
|
||||
if ((STAILQ_NEXT(elm, field) = \
|
||||
STAILQ_NEXT(STAILQ_NEXT(elm, field), field)) == NULL) \
|
||||
(head)->stqh_last = &STAILQ_NEXT((elm), field); \
|
||||
} while (0)
|
||||
|
||||
#define STAILQ_REMOVE_HEAD(head, field) do { \
|
||||
if ((STAILQ_FIRST((head)) = \
|
||||
STAILQ_NEXT(STAILQ_FIRST((head)), field)) == NULL) \
|
||||
(head)->stqh_last = &STAILQ_FIRST((head)); \
|
||||
} while (0)
|
||||
|
||||
#define STAILQ_SWAP(head1, head2, type) do { \
|
||||
QUEUE_TYPEOF(type) *swap_first = STAILQ_FIRST(head1); \
|
||||
QUEUE_TYPEOF(type) **swap_last = (head1)->stqh_last; \
|
||||
STAILQ_FIRST(head1) = STAILQ_FIRST(head2); \
|
||||
(head1)->stqh_last = (head2)->stqh_last; \
|
||||
STAILQ_FIRST(head2) = swap_first; \
|
||||
(head2)->stqh_last = swap_last; \
|
||||
if (STAILQ_EMPTY(head1)) \
|
||||
(head1)->stqh_last = &STAILQ_FIRST(head1); \
|
||||
if (STAILQ_EMPTY(head2)) \
|
||||
(head2)->stqh_last = &STAILQ_FIRST(head2); \
|
||||
} while (0)
|
||||
|
||||
|
||||
/*
|
||||
* List declarations.
|
||||
*/
|
||||
#define LIST_HEAD(name, type) \
|
||||
struct name { \
|
||||
struct type *lh_first; /* first element */ \
|
||||
}
|
||||
|
||||
#define LIST_CLASS_HEAD(name, type) \
|
||||
struct name { \
|
||||
class type *lh_first; /* first element */ \
|
||||
}
|
||||
|
||||
#define LIST_HEAD_INITIALIZER(head) \
|
||||
{ NULL }
|
||||
|
||||
#define LIST_ENTRY(type) \
|
||||
struct { \
|
||||
struct type *le_next; /* next element */ \
|
||||
struct type **le_prev; /* address of previous next element */ \
|
||||
}
|
||||
|
||||
#define LIST_CLASS_ENTRY(type) \
|
||||
struct { \
|
||||
class type *le_next; /* next element */ \
|
||||
class type **le_prev; /* address of previous next element */ \
|
||||
}
|
||||
|
||||
/*
|
||||
* List functions.
|
||||
*/
|
||||
|
||||
#if (defined(_KERNEL) && defined(INVARIANTS))
|
||||
/*
|
||||
* QMD_LIST_CHECK_HEAD(LIST_HEAD *head, LIST_ENTRY NAME)
|
||||
*
|
||||
* If the list is non-empty, validates that the first element of the list
|
||||
* points back at 'head.'
|
||||
*/
|
||||
#define QMD_LIST_CHECK_HEAD(head, field) do { \
|
||||
if (LIST_FIRST((head)) != NULL && \
|
||||
LIST_FIRST((head))->field.le_prev != \
|
||||
&LIST_FIRST((head))) \
|
||||
panic("Bad list head %p first->prev != head", (head)); \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* QMD_LIST_CHECK_NEXT(TYPE *elm, LIST_ENTRY NAME)
|
||||
*
|
||||
* If an element follows 'elm' in the list, validates that the next element
|
||||
* points back at 'elm.'
|
||||
*/
|
||||
#define QMD_LIST_CHECK_NEXT(elm, field) do { \
|
||||
if (LIST_NEXT((elm), field) != NULL && \
|
||||
LIST_NEXT((elm), field)->field.le_prev != \
|
||||
&((elm)->field.le_next)) \
|
||||
panic("Bad link elm %p next->prev != elm", (elm)); \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* QMD_LIST_CHECK_PREV(TYPE *elm, LIST_ENTRY NAME)
|
||||
*
|
||||
* Validates that the previous element (or head of the list) points to 'elm.'
|
||||
*/
|
||||
#define QMD_LIST_CHECK_PREV(elm, field) do { \
|
||||
if (*(elm)->field.le_prev != (elm)) \
|
||||
panic("Bad link elm %p prev->next != elm", (elm)); \
|
||||
} while (0)
|
||||
#else
|
||||
#define QMD_LIST_CHECK_HEAD(head, field)
|
||||
#define QMD_LIST_CHECK_NEXT(elm, field)
|
||||
#define QMD_LIST_CHECK_PREV(elm, field)
|
||||
#endif /* (_KERNEL && INVARIANTS) */
|
||||
|
||||
#define LIST_CONCAT(head1, head2, type, field) do { \
|
||||
QUEUE_TYPEOF(type) *curelm = LIST_FIRST(head1); \
|
||||
if (curelm == NULL) { \
|
||||
if ((LIST_FIRST(head1) = LIST_FIRST(head2)) != NULL) { \
|
||||
LIST_FIRST(head2)->field.le_prev = \
|
||||
&LIST_FIRST((head1)); \
|
||||
LIST_INIT(head2); \
|
||||
} \
|
||||
} else if (LIST_FIRST(head2) != NULL) { \
|
||||
while (LIST_NEXT(curelm, field) != NULL) \
|
||||
curelm = LIST_NEXT(curelm, field); \
|
||||
LIST_NEXT(curelm, field) = LIST_FIRST(head2); \
|
||||
LIST_FIRST(head2)->field.le_prev = &LIST_NEXT(curelm, field); \
|
||||
LIST_INIT(head2); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
#define LIST_EMPTY(head) ((head)->lh_first == NULL)
|
||||
|
||||
#define LIST_FIRST(head) ((head)->lh_first)
|
||||
|
||||
#define LIST_FOREACH(var, head, field) \
|
||||
for ((var) = LIST_FIRST((head)); \
|
||||
(var); \
|
||||
(var) = LIST_NEXT((var), field))
|
||||
|
||||
#define LIST_FOREACH_FROM(var, head, field) \
|
||||
for ((var) = ((var) ? (var) : LIST_FIRST((head))); \
|
||||
(var); \
|
||||
(var) = LIST_NEXT((var), field))
|
||||
|
||||
#define LIST_FOREACH_SAFE(var, head, field, tvar) \
|
||||
for ((var) = LIST_FIRST((head)); \
|
||||
(var) && ((tvar) = LIST_NEXT((var), field), 1); \
|
||||
(var) = (tvar))
|
||||
|
||||
#define LIST_FOREACH_FROM_SAFE(var, head, field, tvar) \
|
||||
for ((var) = ((var) ? (var) : LIST_FIRST((head))); \
|
||||
(var) && ((tvar) = LIST_NEXT((var), field), 1); \
|
||||
(var) = (tvar))
|
||||
|
||||
#define LIST_INIT(head) do { \
|
||||
LIST_FIRST((head)) = NULL; \
|
||||
} while (0)
|
||||
|
||||
#define LIST_INSERT_AFTER(listelm, elm, field) do { \
|
||||
QMD_LIST_CHECK_NEXT(listelm, field); \
|
||||
if ((LIST_NEXT((elm), field) = LIST_NEXT((listelm), field)) != NULL)\
|
||||
LIST_NEXT((listelm), field)->field.le_prev = \
|
||||
&LIST_NEXT((elm), field); \
|
||||
LIST_NEXT((listelm), field) = (elm); \
|
||||
(elm)->field.le_prev = &LIST_NEXT((listelm), field); \
|
||||
} while (0)
|
||||
|
||||
#define LIST_INSERT_BEFORE(listelm, elm, field) do { \
|
||||
QMD_LIST_CHECK_PREV(listelm, field); \
|
||||
(elm)->field.le_prev = (listelm)->field.le_prev; \
|
||||
LIST_NEXT((elm), field) = (listelm); \
|
||||
*(listelm)->field.le_prev = (elm); \
|
||||
(listelm)->field.le_prev = &LIST_NEXT((elm), field); \
|
||||
} while (0)
|
||||
|
||||
#define LIST_INSERT_HEAD(head, elm, field) do { \
|
||||
QMD_LIST_CHECK_HEAD((head), field); \
|
||||
if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL) \
|
||||
LIST_FIRST((head))->field.le_prev = &LIST_NEXT((elm), field);\
|
||||
LIST_FIRST((head)) = (elm); \
|
||||
(elm)->field.le_prev = &LIST_FIRST((head)); \
|
||||
} while (0)
|
||||
|
||||
#define LIST_NEXT(elm, field) ((elm)->field.le_next)
|
||||
|
||||
#define LIST_PREV(elm, head, type, field) \
|
||||
((elm)->field.le_prev == &LIST_FIRST((head)) ? NULL : \
|
||||
__containerof((elm)->field.le_prev, \
|
||||
QUEUE_TYPEOF(type), field.le_next))
|
||||
|
||||
#define LIST_REMOVE(elm, field) do { \
|
||||
QMD_SAVELINK(oldnext, (elm)->field.le_next); \
|
||||
QMD_SAVELINK(oldprev, (elm)->field.le_prev); \
|
||||
QMD_LIST_CHECK_NEXT(elm, field); \
|
||||
QMD_LIST_CHECK_PREV(elm, field); \
|
||||
if (LIST_NEXT((elm), field) != NULL) \
|
||||
LIST_NEXT((elm), field)->field.le_prev = \
|
||||
(elm)->field.le_prev; \
|
||||
*(elm)->field.le_prev = LIST_NEXT((elm), field); \
|
||||
TRASHIT(*oldnext); \
|
||||
TRASHIT(*oldprev); \
|
||||
} while (0)
|
||||
|
||||
#define LIST_SWAP(head1, head2, type, field) do { \
|
||||
QUEUE_TYPEOF(type) *swap_tmp = LIST_FIRST(head1); \
|
||||
LIST_FIRST((head1)) = LIST_FIRST((head2)); \
|
||||
LIST_FIRST((head2)) = swap_tmp; \
|
||||
if ((swap_tmp = LIST_FIRST((head1))) != NULL) \
|
||||
swap_tmp->field.le_prev = &LIST_FIRST((head1)); \
|
||||
if ((swap_tmp = LIST_FIRST((head2))) != NULL) \
|
||||
swap_tmp->field.le_prev = &LIST_FIRST((head2)); \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* Tail queue declarations.
|
||||
*/
|
||||
@ -123,10 +619,58 @@ struct { \
|
||||
/*
|
||||
* Tail queue functions.
|
||||
*/
|
||||
#if (defined(_KERNEL) && defined(INVARIANTS))
|
||||
/*
|
||||
* QMD_TAILQ_CHECK_HEAD(TAILQ_HEAD *head, TAILQ_ENTRY NAME)
|
||||
*
|
||||
* If the tailq is non-empty, validates that the first element of the tailq
|
||||
* points back at 'head.'
|
||||
*/
|
||||
#define QMD_TAILQ_CHECK_HEAD(head, field) do { \
|
||||
if (!TAILQ_EMPTY(head) && \
|
||||
TAILQ_FIRST((head))->field.tqe_prev != \
|
||||
&TAILQ_FIRST((head))) \
|
||||
panic("Bad tailq head %p first->prev != head", (head)); \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* QMD_TAILQ_CHECK_TAIL(TAILQ_HEAD *head, TAILQ_ENTRY NAME)
|
||||
*
|
||||
* Validates that the tail of the tailq is a pointer to pointer to NULL.
|
||||
*/
|
||||
#define QMD_TAILQ_CHECK_TAIL(head, field) do { \
|
||||
if (*(head)->tqh_last != NULL) \
|
||||
panic("Bad tailq NEXT(%p->tqh_last) != NULL", (head)); \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* QMD_TAILQ_CHECK_NEXT(TYPE *elm, TAILQ_ENTRY NAME)
|
||||
*
|
||||
* If an element follows 'elm' in the tailq, validates that the next element
|
||||
* points back at 'elm.'
|
||||
*/
|
||||
#define QMD_TAILQ_CHECK_NEXT(elm, field) do { \
|
||||
if (TAILQ_NEXT((elm), field) != NULL && \
|
||||
TAILQ_NEXT((elm), field)->field.tqe_prev != \
|
||||
&((elm)->field.tqe_next)) \
|
||||
panic("Bad link elm %p next->prev != elm", (elm)); \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* QMD_TAILQ_CHECK_PREV(TYPE *elm, TAILQ_ENTRY NAME)
|
||||
*
|
||||
* Validates that the previous element (or head of the tailq) points to 'elm.'
|
||||
*/
|
||||
#define QMD_TAILQ_CHECK_PREV(elm, field) do { \
|
||||
if (*(elm)->field.tqe_prev != (elm)) \
|
||||
panic("Bad link elm %p prev->next != elm", (elm)); \
|
||||
} while (0)
|
||||
#else
|
||||
#define QMD_TAILQ_CHECK_HEAD(head, field)
|
||||
#define QMD_TAILQ_CHECK_TAIL(head, headname)
|
||||
#define QMD_TAILQ_CHECK_NEXT(elm, field)
|
||||
#define QMD_TAILQ_CHECK_PREV(elm, field)
|
||||
#endif /* (_KERNEL && INVARIANTS) */
|
||||
|
||||
#define TAILQ_CONCAT(head1, head2, field) do { \
|
||||
if (!TAILQ_EMPTY(head2)) { \
|
||||
@ -191,9 +735,8 @@ struct { \
|
||||
|
||||
#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
|
||||
QMD_TAILQ_CHECK_NEXT(listelm, field); \
|
||||
TAILQ_NEXT((elm), field) = TAILQ_NEXT((listelm), field); \
|
||||
if (TAILQ_NEXT((listelm), field) != NULL) \
|
||||
TAILQ_NEXT((elm), field)->field.tqe_prev = \
|
||||
if ((TAILQ_NEXT((elm), field) = TAILQ_NEXT((listelm), field)) != NULL)\
|
||||
TAILQ_NEXT((elm), field)->field.tqe_prev = \
|
||||
&TAILQ_NEXT((elm), field); \
|
||||
else { \
|
||||
(head)->tqh_last = &TAILQ_NEXT((elm), field); \
|
||||
@ -217,8 +760,7 @@ struct { \
|
||||
|
||||
#define TAILQ_INSERT_HEAD(head, elm, field) do { \
|
||||
QMD_TAILQ_CHECK_HEAD(head, field); \
|
||||
TAILQ_NEXT((elm), field) = TAILQ_FIRST((head)); \
|
||||
if (TAILQ_FIRST((head)) != NULL) \
|
||||
if ((TAILQ_NEXT((elm), field) = TAILQ_FIRST((head))) != NULL) \
|
||||
TAILQ_FIRST((head))->field.tqe_prev = \
|
||||
&TAILQ_NEXT((elm), field); \
|
||||
else \
|
||||
@ -250,21 +792,24 @@ struct { \
|
||||
* you may want to prefetch the last data element.
|
||||
*/
|
||||
#define TAILQ_LAST_FAST(head, type, field) \
|
||||
(TAILQ_EMPTY(head) ? NULL : __containerof((head)->tqh_last, \
|
||||
QUEUE_TYPEOF(type), field.tqe_next))
|
||||
(TAILQ_EMPTY(head) ? NULL : __containerof((head)->tqh_last, QUEUE_TYPEOF(type), field.tqe_next))
|
||||
|
||||
#define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
|
||||
|
||||
#define TAILQ_PREV(elm, headname, field) \
|
||||
(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
|
||||
|
||||
#define TAILQ_PREV_FAST(elm, head, type, field) \
|
||||
((elm)->field.tqe_prev == &(head)->tqh_first ? NULL : \
|
||||
__containerof((elm)->field.tqe_prev, QUEUE_TYPEOF(type), field.tqe_next))
|
||||
|
||||
#define TAILQ_REMOVE(head, elm, field) do { \
|
||||
QMD_SAVELINK(oldnext, (elm)->field.tqe_next); \
|
||||
QMD_SAVELINK(oldprev, (elm)->field.tqe_prev); \
|
||||
QMD_TAILQ_CHECK_NEXT(elm, field); \
|
||||
QMD_TAILQ_CHECK_PREV(elm, field); \
|
||||
if ((TAILQ_NEXT((elm), field)) != NULL) \
|
||||
TAILQ_NEXT((elm), field)->field.tqe_prev = \
|
||||
TAILQ_NEXT((elm), field)->field.tqe_prev = \
|
||||
(elm)->field.tqe_prev; \
|
||||
else { \
|
||||
(head)->tqh_last = (elm)->field.tqe_prev; \
|
||||
@ -277,26 +822,20 @@ struct { \
|
||||
} while (0)
|
||||
|
||||
#define TAILQ_SWAP(head1, head2, type, field) do { \
|
||||
QUEUE_TYPEOF(type) * swap_first = (head1)->tqh_first; \
|
||||
QUEUE_TYPEOF(type) * *swap_last = (head1)->tqh_last; \
|
||||
QUEUE_TYPEOF(type) *swap_first = (head1)->tqh_first; \
|
||||
QUEUE_TYPEOF(type) **swap_last = (head1)->tqh_last; \
|
||||
(head1)->tqh_first = (head2)->tqh_first; \
|
||||
(head1)->tqh_last = (head2)->tqh_last; \
|
||||
(head2)->tqh_first = swap_first; \
|
||||
(head2)->tqh_last = swap_last; \
|
||||
swap_first = (head1)->tqh_first; \
|
||||
if (swap_first != NULL) \
|
||||
if ((swap_first = (head1)->tqh_first) != NULL) \
|
||||
swap_first->field.tqe_prev = &(head1)->tqh_first; \
|
||||
else \
|
||||
(head1)->tqh_last = &(head1)->tqh_first; \
|
||||
swap_first = (head2)->tqh_first; \
|
||||
if (swap_first != NULL) \
|
||||
if ((swap_first = (head2)->tqh_first) != NULL) \
|
||||
swap_first->field.tqe_prev = &(head2)->tqh_first; \
|
||||
else \
|
||||
(head2)->tqh_last = &(head2)->tqh_first; \
|
||||
} while (0)
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* _SYS_QUEUE_H_ */
|
||||
#endif /* !_SYS_QUEUE_H_ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user