X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=include%2Fbabeltrace%2Flist.h;fp=include%2Fbabeltrace%2Flist.h;h=b872713fdb7dfcdce01923a3545444dafb4e7e7b;hp=0000000000000000000000000000000000000000;hb=fe41395a55903f52ae9c6abf1d95c2a903a97ce0;hpb=0009a72566b746aaa6dc82d93e547a422af2587c

diff --git a/include/babeltrace/list.h b/include/babeltrace/list.h
new file mode 100644
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--- /dev/null
+++ b/include/babeltrace/list.h
@@ -0,0 +1,170 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _LIST_H
+#define _LIST_H	1
+
+/* The definitions of this file are adopted from those which can be
+   found in the Linux kernel headers to enable people familiar with
+   the latter find their way in these sources as well.  */
+
+
+/* Basic type for the double-link list.  */
+typedef struct cds_list_head
+{
+  struct cds_list_head *next;
+  struct cds_list_head *prev;
+} list_t;
+
+
+/* Define a variable with the head and tail of the list.  */
+#define CDS_LIST_HEAD(name) \
+  list_t name = { &(name), &(name) }
+
+/* Initialize a new list head.  */
+#define CDS_INIT_LIST_HEAD(ptr) \
+  (ptr)->next = (ptr)->prev = (ptr)
+
+#define CDS_LIST_HEAD_INIT(name) { .prev = &(name), .next = &(name) }
+
+/* Add new element at the head of the list.  */
+static inline void
+cds_list_add (list_t *newp, list_t *head)
+{
+  head->next->prev = newp;
+  newp->next = head->next;
+  newp->prev = head;
+  head->next = newp;
+}
+
+
+/* Add new element at the tail of the list.  */
+static inline void
+cds_list_add_tail (list_t *newp, list_t *head)
+{
+  head->prev->next = newp;
+  newp->next = head;
+  newp->prev = head->prev;
+  head->prev = newp;
+}
+
+
+/* Remove element from list.  */
+static inline void
+__cds_list_del (list_t *prev, list_t *next)
+{
+  next->prev = prev;
+  prev->next = next;
+}
+
+/* Remove element from list.  */
+static inline void
+cds_list_del (list_t *elem)
+{
+  __cds_list_del (elem->prev, elem->next);
+}
+
+/* delete from list, add to another list as head */
+static inline void
+cds_list_move (list_t *elem, list_t *head)
+{
+  __cds_list_del (elem->prev, elem->next);
+  cds_list_add (elem, head);
+}
+
+/* replace an old entry.
+ */
+static inline void
+cds_list_replace(list_t *old, list_t *_new)
+{
+	_new->next = old->next;
+	_new->prev = old->prev;
+	_new->prev->next = _new;
+	_new->next->prev = _new;
+}
+
+/* Join two lists.  */
+static inline void
+cds_list_splice (list_t *add, list_t *head)
+{
+  /* Do nothing if the list which gets added is empty.  */
+  if (add != add->next)
+    {
+      add->next->prev = head;
+      add->prev->next = head->next;
+      head->next->prev = add->prev;
+      head->next = add->next;
+    }
+}
+
+
+/* Get typed element from list at a given position.  */
+#define cds_list_entry(ptr, type, member) \
+  ((type *) ((char *) (ptr) - (unsigned long) (&((type *) 0)->member)))
+
+
+
+/* Iterate forward over the elements of the list.  */
+#define cds_list_for_each(pos, head) \
+  for (pos = (head)->next; pos != (head); pos = pos->next)
+
+
+/* Iterate forward over the elements of the list.  */
+#define cds_list_for_each_prev(pos, head) \
+  for (pos = (head)->prev; pos != (head); pos = pos->prev)
+
+
+/* Iterate backwards over the elements list.  The list elements can be
+   removed from the list while doing this.  */
+#define cds_list_for_each_prev_safe(pos, p, head) \
+  for (pos = (head)->prev, p = pos->prev; \
+       pos != (head); \
+       pos = p, p = pos->prev)
+
+#define cds_list_for_each_entry(pos, head, member)				\
+	for (pos = cds_list_entry((head)->next, typeof(*pos), member);	\
+	     &pos->member != (head);					\
+	     pos = cds_list_entry(pos->member.next, typeof(*pos), member))
+
+#define cds_list_for_each_entry_reverse(pos, head, member)			\
+	for (pos = cds_list_entry((head)->prev, typeof(*pos), member);	\
+	     &pos->member != (head);					\
+	     pos = cds_list_entry(pos->member.prev, typeof(*pos), member))
+
+#define cds_list_for_each_entry_safe(pos, p, head, member)			\
+	for (pos = cds_list_entry((head)->next, typeof(*pos), member),	\
+		     p = cds_list_entry(pos->member.next,typeof(*pos), member); \
+	     &pos->member != (head);					\
+	     pos = p, p = cds_list_entry(pos->member.next, typeof(*pos), member))
+
+static inline int cds_list_empty(list_t *head)
+{
+	return head == head->next;
+}
+
+static inline void cds_list_replace_init(list_t *old,
+				     list_t *_new)
+{
+	list_t *head = old->next;
+	cds_list_del(old);
+	cds_list_add_tail(_new, head);
+	CDS_INIT_LIST_HEAD(old);
+}
+
+#endif	/* list.h */