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authorRoland McGrath <roland@hack.frob.com>2014-06-12 13:48:47 -0700
committerRoland McGrath <roland@hack.frob.com>2014-06-12 13:48:47 -0700
commit463dc947b4f9bc4137c9919ee72b896403926474 (patch)
treeaaade6746cade247ea83c99c3057f6f08e1eb6a9 /include
parente876b09076d859836f948691dee5a1e3b956256e (diff)
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Get rid of nptl/sysdeps/pthread/ subdirectory
Diffstat (limited to 'include')
-rw-r--r--include/list.h117
1 files changed, 117 insertions, 0 deletions
diff --git a/include/list.h b/include/list.h
new file mode 100644
index 0000000..749c727
--- /dev/null
+++ b/include/list.h
@@ -0,0 +1,117 @@
+/* Copyright (C) 2002-2014 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _LIST_H
+
+#ifndef __need_list_t
+# define _LIST_H 1
+#endif
+
+/* 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. */
+
+
+#if defined __need_list_t || defined _LIST_H
+# ifndef __list_t_defined
+# define __list_t_defined
+/* Basic type for the double-link list. */
+typedef struct list_head
+{
+ struct list_head *next;
+ struct list_head *prev;
+} list_t;
+# endif
+# undef __need_list_t
+#endif
+
+#ifdef _LIST_H
+
+# include <atomic.h>
+
+/* Define a variable with the head and tail of the list. */
+# define LIST_HEAD(name) \
+ list_t name = { &(name), &(name) }
+
+/* Initialize a new list head. */
+# define INIT_LIST_HEAD(ptr) \
+ (ptr)->next = (ptr)->prev = (ptr)
+
+
+/* Add new element at the head of the list. */
+static inline void
+list_add (list_t *newp, list_t *head)
+{
+ newp->next = head->next;
+ newp->prev = head;
+ head->next->prev = newp;
+ atomic_write_barrier ();
+ head->next = newp;
+}
+
+
+/* Remove element from list. */
+static inline void
+list_del (list_t *elem)
+{
+ elem->next->prev = elem->prev;
+ elem->prev->next = elem->next;
+}
+
+
+/* Join two lists. */
+static inline void
+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 list_entry(ptr, type, member) \
+ ((type *) ((char *) (ptr) - (unsigned long) (&((type *) 0)->member)))
+
+
+
+/* Iterate forward over the elements of the list. */
+# define list_for_each(pos, head) \
+ for (pos = (head)->next; pos != (head); pos = pos->next)
+
+
+/* Iterate forward over the elements of the list. */
+# define 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 list_for_each_prev_safe(pos, p, head) \
+ for (pos = (head)->prev, p = pos->prev; \
+ pos != (head); \
+ pos = p, p = pos->prev)
+
+#endif /* _LIST_H */
+
+#endif /* list.h */