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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 1/5] tools/include: generate a _xen_list.h file
Today tools/include contains two basically identical header files
generated from the same source. They just differ by the used name space
and they are being generated from different Makefiles via a perl
script.
Prepare to have only one such header by using a more generic namespace
"XEN" for _xen_list.h.
As the original header hasn't been updated in the Xen tree since its
introduction about 10 years ago, and the updates of FreeBSD side have
mostly covered BSD internal debugging aids, just don't generate the
new header during build, especially as using the current FreeBSD
version of the file would require some updates of the perl script,
which are potentially more work than just doing the needed editing by
hand. Additionally this enables to remove the not needed debugging
extensions of FreeBSD.
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
tools/include/Makefile | 2 +
tools/include/_xen_list.h | 509 ++++++++++++++++++++++++++++++++++++++
2 files changed, 511 insertions(+)
create mode 100644 tools/include/_xen_list.h
diff --git a/tools/include/Makefile b/tools/include/Makefile
index d7b51006e0..d965987f55 100644
--- a/tools/include/Makefile
+++ b/tools/include/Makefile
@@ -70,11 +70,13 @@ install: all
$(INSTALL_DATA) xen/io/*.h $(DESTDIR)$(includedir)/xen/io
$(INSTALL_DATA) xen/sys/*.h $(DESTDIR)$(includedir)/xen/sys
$(INSTALL_DATA) xen/xsm/*.h $(DESTDIR)$(includedir)/xen/xsm
+ $(INSTALL_DATA) _xen_list.h $(DESTDIR)$(includedir)
.PHONY: uninstall
uninstall:
echo "[FIXME] uninstall headers"
rm -rf $(DESTDIR)$(includedir)/xen
+ rm -f $(DESTDIR)$(includedir)/_xen_list.h
.PHONY: clean
clean:
diff --git a/tools/include/_xen_list.h b/tools/include/_xen_list.h
new file mode 100644
index 0000000000..ce246f95c9
--- /dev/null
+++ b/tools/include/_xen_list.h
@@ -0,0 +1,509 @@
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)queue.h 8.5 (Berkeley) 8/20/94
+ * $FreeBSD$
+ */
+
+#ifndef XEN__SYS_QUEUE_H_
+#define XEN__SYS_QUEUE_H_
+
+/* #include <sys/cdefs.h> */
+
+/*
+ * 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 only be traversed in the forward 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
+ * 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, 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.
+ *
+ *
+ * XEN_SLIST XEN_LIST XEN_STAILQ
XEN_TAILQ
+ * _HEAD + + + +
+ * _HEAD_INITIALIZER + + + +
+ * _ENTRY + + + +
+ * _INIT + + + +
+ * _EMPTY + + + +
+ * _FIRST + + + +
+ * _NEXT + + + +
+ * _PREV - - - +
+ * _LAST - - + +
+ * _FOREACH + + + +
+ * _FOREACH_SAFE + + + +
+ * _FOREACH_REVERSE - - - +
+ * _FOREACH_REVERSE_SAFE - - - +
+ * _INSERT_HEAD + + + +
+ * _INSERT_BEFORE - + - +
+ * _INSERT_AFTER + + + +
+ * _INSERT_TAIL - - + +
+ * _CONCAT - - + +
+ * _REMOVE_AFTER + - + -
+ * _REMOVE_HEAD + - + -
+ * _REMOVE + + + +
+ * _SWAP + + + +
+ *
+ */
+
+/*
+ * Singly-linked List declarations.
+ */
+#define XEN_SLIST_HEAD(name, type)
\
+struct name { \
+ type *slh_first; /* first element */ \
+}
+
+#define XEN_SLIST_HEAD_INITIALIZER(head)
\
+ { 0 }
+
+#define XEN_SLIST_ENTRY(type)
\
+struct { \
+ type *sle_next; /* next element */ \
+}
+
+/*
+ * Singly-linked List functions.
+ */
+#define XEN_SLIST_EMPTY(head) ((head)->slh_first == 0)
+
+#define XEN_SLIST_FIRST(head) ((head)->slh_first)
+
+#define XEN_SLIST_FOREACH(var, head, field)
\
+ for ((var) = XEN_SLIST_FIRST((head)); \
+ (var); \
+ (var) = XEN_SLIST_NEXT((var), field))
+
+#define XEN_SLIST_FOREACH_SAFE(var, head, field, tvar)
\
+ for ((var) = XEN_SLIST_FIRST((head)); \
+ (var) && ((tvar) = XEN_SLIST_NEXT((var), field), 1); \
+ (var) = (tvar))
+
+#define XEN_SLIST_FOREACH_PREVPTR(var, varp, head, field)
\
+ for ((varp) = &XEN_SLIST_FIRST((head)); \
+ ((var) = *(varp)) != 0; \
+ (varp) = &XEN_SLIST_NEXT((var), field))
+
+#define XEN_SLIST_INIT(head) do {
\
+ XEN_SLIST_FIRST((head)) = 0; \
+} while (0)
+
+#define XEN_SLIST_INSERT_AFTER(slistelm, elm, field) do {
\
+ XEN_SLIST_NEXT((elm), field) = XEN_SLIST_NEXT((slistelm), field);\
+ XEN_SLIST_NEXT((slistelm), field) = (elm); \
+} while (0)
+
+#define XEN_SLIST_INSERT_HEAD(head, elm, field) do {
\
+ XEN_SLIST_NEXT((elm), field) = XEN_SLIST_FIRST((head)); \
+ XEN_SLIST_FIRST((head)) = (elm); \
+} while (0)
+
+#define XEN_SLIST_NEXT(elm, field) ((elm)->field.sle_next)
+
+#define XEN_SLIST_REMOVE(head, elm, type, field) do {
\
+ if (XEN_SLIST_FIRST((head)) == (elm)) { \
+ XEN_SLIST_REMOVE_HEAD((head), field); \
+ } \
+ else { \
+ type *curelm = XEN_SLIST_FIRST((head)); \
+ while (XEN_SLIST_NEXT(curelm, field) != (elm)) \
+ curelm = XEN_SLIST_NEXT(curelm, field); \
+ XEN_SLIST_REMOVE_AFTER(curelm, field); \
+ } \
+} while (0)
+
+#define XEN_SLIST_REMOVE_AFTER(elm, field) do {
\
+ XEN_SLIST_NEXT(elm, field) = \
+ XEN_SLIST_NEXT(XEN_SLIST_NEXT(elm, field), field); \
+} while (0)
+
+#define XEN_SLIST_REMOVE_HEAD(head, field) do {
\
+ XEN_SLIST_FIRST((head)) = XEN_SLIST_NEXT(XEN_SLIST_FIRST((head)),
field);\
+} while (0)
+
+#define XEN_SLIST_SWAP(head1, head2, type) do {
\
+ type *swap_first = XEN_SLIST_FIRST(head1); \
+ XEN_SLIST_FIRST(head1) = XEN_SLIST_FIRST(head2); \
+ XEN_SLIST_FIRST(head2) = swap_first; \
+} while (0)
+
+/*
+ * Singly-linked Tail queue declarations.
+ */
+#define XEN_STAILQ_HEAD(name, type)
\
+struct name { \
+ type *stqh_first;/* first element */ \
+ type **stqh_last;/* addr of last next element */ \
+}
+
+#define XEN_STAILQ_HEAD_INITIALIZER(head)
\
+ { 0, &(head).stqh_first }
+
+#define XEN_STAILQ_ENTRY(type)
\
+struct { \
+ type *stqe_next; /* next element */ \
+}
+
+/*
+ * Singly-linked Tail queue functions.
+ */
+#define XEN_STAILQ_CONCAT(head1, head2) do {
\
+ if (!XEN_STAILQ_EMPTY((head2))) { \
+ *(head1)->stqh_last = (head2)->stqh_first; \
+ (head1)->stqh_last = (head2)->stqh_last; \
+ XEN_STAILQ_INIT((head2)); \
+ } \
+} while (0)
+
+#define XEN_STAILQ_EMPTY(head) ((head)->stqh_first == 0)
+
+#define XEN_STAILQ_FIRST(head) ((head)->stqh_first)
+
+#define XEN_STAILQ_FOREACH(var, head, field)
\
+ for((var) = XEN_STAILQ_FIRST((head)); \
+ (var); \
+ (var) = XEN_STAILQ_NEXT((var), field))
+
+
+#define XEN_STAILQ_FOREACH_SAFE(var, head, field, tvar)
\
+ for ((var) = XEN_STAILQ_FIRST((head)); \
+ (var) && ((tvar) = XEN_STAILQ_NEXT((var), field), 1); \
+ (var) = (tvar))
+
+#define XEN_STAILQ_INIT(head) do {
\
+ XEN_STAILQ_FIRST((head)) = 0; \
+ (head)->stqh_last = &XEN_STAILQ_FIRST((head)); \
+} while (0)
+
+#define XEN_STAILQ_INSERT_AFTER(head, tqelm, elm, field) do {
\
+ if ((XEN_STAILQ_NEXT((elm), field) = XEN_STAILQ_NEXT((tqelm), field))
== 0)\
+ (head)->stqh_last = &XEN_STAILQ_NEXT((elm), field); \
+ XEN_STAILQ_NEXT((tqelm), field) = (elm); \
+} while (0)
+
+#define XEN_STAILQ_INSERT_HEAD(head, elm, field) do {
\
+ if ((XEN_STAILQ_NEXT((elm), field) = XEN_STAILQ_FIRST((head))) == 0)\
+ (head)->stqh_last = &XEN_STAILQ_NEXT((elm), field); \
+ XEN_STAILQ_FIRST((head)) = (elm); \
+} while (0)
+
+#define XEN_STAILQ_INSERT_TAIL(head, elm, field) do {
\
+ XEN_STAILQ_NEXT((elm), field) = 0; \
+ *(head)->stqh_last = (elm); \
+ (head)->stqh_last = &XEN_STAILQ_NEXT((elm), field); \
+} while (0)
+
+#define XEN_STAILQ_LAST(head, type, field)
\
+ (XEN_STAILQ_EMPTY((head)) ? \
+ 0 : \
+ ((type *)(void *) \
+ ((char *)((head)->stqh_last) - offsetof(type, field))))
+
+#define XEN_STAILQ_NEXT(elm, field) ((elm)->field.stqe_next)
+
+#define XEN_STAILQ_REMOVE(head, elm, type, field) do {
\
+ if (XEN_STAILQ_FIRST((head)) == (elm)) { \
+ XEN_STAILQ_REMOVE_HEAD((head), field); \
+ } \
+ else { \
+ type *curelm = XEN_STAILQ_FIRST((head)); \
+ while (XEN_STAILQ_NEXT(curelm, field) != (elm)) \
+ curelm = XEN_STAILQ_NEXT(curelm, field); \
+ XEN_STAILQ_REMOVE_AFTER(head, curelm, field); \
+ } \
+} while (0)
+
+#define XEN_STAILQ_REMOVE_AFTER(head, elm, field) do { \
+ if ((XEN_STAILQ_NEXT(elm, field) = \
+ XEN_STAILQ_NEXT(XEN_STAILQ_NEXT(elm, field), field)) == 0) \
+ (head)->stqh_last = &XEN_STAILQ_NEXT((elm), field); \
+} while (0)
+
+#define XEN_STAILQ_REMOVE_HEAD(head, field) do {
\
+ if ((XEN_STAILQ_FIRST((head)) = \
+ XEN_STAILQ_NEXT(XEN_STAILQ_FIRST((head)), field)) == 0) \
+ (head)->stqh_last = &XEN_STAILQ_FIRST((head)); \
+} while (0)
+
+#define XEN_STAILQ_SWAP(head1, head2, type) do { \
+ type *swap_first = XEN_STAILQ_FIRST(head1); \
+ type **swap_last = (head1)->stqh_last; \
+ XEN_STAILQ_FIRST(head1) = XEN_STAILQ_FIRST(head2); \
+ (head1)->stqh_last = (head2)->stqh_last; \
+ XEN_STAILQ_FIRST(head2) = swap_first; \
+ (head2)->stqh_last = swap_last; \
+ if (XEN_STAILQ_EMPTY(head1)) \
+ (head1)->stqh_last = &XEN_STAILQ_FIRST(head1); \
+ if (XEN_STAILQ_EMPTY(head2)) \
+ (head2)->stqh_last = &XEN_STAILQ_FIRST(head2); \
+} while (0)
+
+
+/*
+ * List declarations.
+ */
+#define XEN_LIST_HEAD(name, type)
\
+struct name { \
+ type *lh_first; /* first element */ \
+}
+
+#define XEN_LIST_HEAD_INITIALIZER(head)
\
+ { 0 }
+
+#define XEN_LIST_ENTRY(type)
\
+struct { \
+ type *le_next; /* next element */ \
+ type **le_prev; /* address of previous next element */ \
+}
+
+/*
+ * List functions.
+ */
+
+#define XEN_LIST_EMPTY(head) ((head)->lh_first == 0)
+
+#define XEN_LIST_FIRST(head) ((head)->lh_first)
+
+#define XEN_LIST_FOREACH(var, head, field)
\
+ for ((var) = XEN_LIST_FIRST((head)); \
+ (var); \
+ (var) = XEN_LIST_NEXT((var), field))
+
+#define XEN_LIST_FOREACH_SAFE(var, head, field, tvar)
\
+ for ((var) = XEN_LIST_FIRST((head)); \
+ (var) && ((tvar) = XEN_LIST_NEXT((var), field), 1); \
+ (var) = (tvar))
+
+#define XEN_LIST_INIT(head) do {
\
+ XEN_LIST_FIRST((head)) = 0; \
+} while (0)
+
+#define XEN_LIST_INSERT_AFTER(listelm, elm, field) do {
\
+ if ((XEN_LIST_NEXT((elm), field) = XEN_LIST_NEXT((listelm), field)) !=
0)\
+ XEN_LIST_NEXT((listelm), field)->field.le_prev = \
+ &XEN_LIST_NEXT((elm), field); \
+ XEN_LIST_NEXT((listelm), field) = (elm); \
+ (elm)->field.le_prev = &XEN_LIST_NEXT((listelm), field); \
+} while (0)
+
+#define XEN_LIST_INSERT_BEFORE(listelm, elm, field) do {
\
+ (elm)->field.le_prev = (listelm)->field.le_prev; \
+ XEN_LIST_NEXT((elm), field) = (listelm); \
+ *(listelm)->field.le_prev = (elm); \
+ (listelm)->field.le_prev = &XEN_LIST_NEXT((elm), field); \
+} while (0)
+
+#define XEN_LIST_INSERT_HEAD(head, elm, field) do {
\
+ if ((XEN_LIST_NEXT((elm), field) = XEN_LIST_FIRST((head))) != 0)\
+ XEN_LIST_FIRST((head))->field.le_prev = &XEN_LIST_NEXT((elm),
field);\
+ XEN_LIST_FIRST((head)) = (elm); \
+ (elm)->field.le_prev = &XEN_LIST_FIRST((head)); \
+} while (0)
+
+#define XEN_LIST_NEXT(elm, field) ((elm)->field.le_next)
+
+#define XEN_LIST_REMOVE(elm, field) do {
\
+ if (XEN_LIST_NEXT((elm), field) != 0) \
+ XEN_LIST_NEXT((elm), field)->field.le_prev = \
+ (elm)->field.le_prev; \
+ *(elm)->field.le_prev = XEN_LIST_NEXT((elm), field); \
+} while (0)
+
+#define XEN_LIST_SWAP(head1, head2, type, field) do { \
+ type *swap_tmp = XEN_LIST_FIRST((head1)); \
+ XEN_LIST_FIRST((head1)) = XEN_LIST_FIRST((head2)); \
+ XEN_LIST_FIRST((head2)) = swap_tmp; \
+ if ((swap_tmp = XEN_LIST_FIRST((head1))) != 0) \
+ swap_tmp->field.le_prev = &XEN_LIST_FIRST((head1)); \
+ if ((swap_tmp = XEN_LIST_FIRST((head2))) != 0) \
+ swap_tmp->field.le_prev = &XEN_LIST_FIRST((head2)); \
+} while (0)
+
+/*
+ * Tail queue declarations.
+ */
+#define XEN_TAILQ_HEAD(name, type)
\
+struct name { \
+ type *tqh_first; /* first element */ \
+ type **tqh_last; /* addr of last next element */ \
+}
+
+#define XEN_TAILQ_HEAD_INITIALIZER(head)
\
+ { 0, &(head).tqh_first }
+
+#define XEN_TAILQ_ENTRY(type)
\
+struct { \
+ type *tqe_next; /* next element */ \
+ type **tqe_prev; /* address of previous next element */ \
+}
+
+/*
+ * Tail queue functions.
+ */
+
+#define XEN_TAILQ_CONCAT(head1, head2, field) do {
\
+ if (!XEN_TAILQ_EMPTY(head2)) { \
+ *(head1)->tqh_last = (head2)->tqh_first; \
+ (head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \
+ (head1)->tqh_last = (head2)->tqh_last; \
+ XEN_TAILQ_INIT((head2)); \
+ } \
+} while (0)
+
+#define XEN_TAILQ_EMPTY(head) ((head)->tqh_first == 0)
+
+#define XEN_TAILQ_FIRST(head) ((head)->tqh_first)
+
+#define XEN_TAILQ_FOREACH(var, head, field)
\
+ for ((var) = XEN_TAILQ_FIRST((head)); \
+ (var); \
+ (var) = XEN_TAILQ_NEXT((var), field))
+
+#define XEN_TAILQ_FOREACH_SAFE(var, head, field, tvar)
\
+ for ((var) = XEN_TAILQ_FIRST((head)); \
+ (var) && ((tvar) = XEN_TAILQ_NEXT((var), field), 1); \
+ (var) = (tvar))
+
+#define XEN_TAILQ_FOREACH_REVERSE(var, head, headname, field)
\
+ for ((var) = XEN_TAILQ_LAST((head), headname); \
+ (var); \
+ (var) = XEN_TAILQ_PREV((var), headname, field))
+
+#define XEN_TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field,
tvar) \
+ for ((var) = XEN_TAILQ_LAST((head), headname); \
+ (var) && ((tvar) = XEN_TAILQ_PREV((var), headname, field), 1);\
+ (var) = (tvar))
+
+#define XEN_TAILQ_INIT(head) do {
\
+ XEN_TAILQ_FIRST((head)) = 0; \
+ (head)->tqh_last = &XEN_TAILQ_FIRST((head)); \
+} while (0)
+
+#define XEN_TAILQ_INSERT_AFTER(head, listelm, elm, field) do {
\
+ if ((XEN_TAILQ_NEXT((elm), field) = XEN_TAILQ_NEXT((listelm), field))
!= 0)\
+ XEN_TAILQ_NEXT((elm), field)->field.tqe_prev = \
+ &XEN_TAILQ_NEXT((elm), field); \
+ else { \
+ (head)->tqh_last = &XEN_TAILQ_NEXT((elm), field); \
+ } \
+ XEN_TAILQ_NEXT((listelm), field) = (elm); \
+ (elm)->field.tqe_prev = &XEN_TAILQ_NEXT((listelm), field); \
+} while (0)
+
+#define XEN_TAILQ_INSERT_BEFORE(listelm, elm, field) do {
\
+ (elm)->field.tqe_prev = (listelm)->field.tqe_prev; \
+ XEN_TAILQ_NEXT((elm), field) = (listelm); \
+ *(listelm)->field.tqe_prev = (elm); \
+ (listelm)->field.tqe_prev = &XEN_TAILQ_NEXT((elm), field); \
+} while (0)
+
+#define XEN_TAILQ_INSERT_HEAD(head, elm, field) do {
\
+ if ((XEN_TAILQ_NEXT((elm), field) = XEN_TAILQ_FIRST((head))) != 0)\
+ XEN_TAILQ_FIRST((head))->field.tqe_prev = \
+ &XEN_TAILQ_NEXT((elm), field); \
+ else \
+ (head)->tqh_last = &XEN_TAILQ_NEXT((elm), field); \
+ XEN_TAILQ_FIRST((head)) = (elm); \
+ (elm)->field.tqe_prev = &XEN_TAILQ_FIRST((head)); \
+} while (0)
+
+#define XEN_TAILQ_INSERT_TAIL(head, elm, field) do {
\
+ XEN_TAILQ_NEXT((elm), field) = 0; \
+ (elm)->field.tqe_prev = (head)->tqh_last; \
+ *(head)->tqh_last = (elm); \
+ (head)->tqh_last = &XEN_TAILQ_NEXT((elm), field); \
+} while (0)
+
+#define XEN_TAILQ_LAST(head, headname)
\
+ (*(((struct headname *)((head)->tqh_last))->tqh_last))
+
+#define XEN_TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
+
+#define XEN_TAILQ_PREV(elm, headname, field)
\
+ (*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
+
+#define XEN_TAILQ_REMOVE(head, elm, field) do {
\
+ if ((XEN_TAILQ_NEXT((elm), field)) != 0) \
+ XEN_TAILQ_NEXT((elm), field)->field.tqe_prev = \
+ (elm)->field.tqe_prev; \
+ else { \
+ (head)->tqh_last = (elm)->field.tqe_prev; \
+ } \
+ *(elm)->field.tqe_prev = XEN_TAILQ_NEXT((elm), field); \
+} while (0)
+
+#define XEN_TAILQ_SWAP(head1, head2, type, field) do { \
+ type *swap_first = (head1)->tqh_first; \
+ 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; \
+ if ((swap_first = (head1)->tqh_first) != 0) \
+ swap_first->field.tqe_prev = &(head1)->tqh_first; \
+ else \
+ (head1)->tqh_last = &(head1)->tqh_first; \
+ if ((swap_first = (head2)->tqh_first) != 0) \
+ swap_first->field.tqe_prev = &(head2)->tqh_first; \
+ else \
+ (head2)->tqh_last = &(head2)->tqh_first; \
+} while (0)
+
+#endif /* !XEN__SYS_QUEUE_H_ */
--
2.34.1
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