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authordsteklof@us.ibm.com <dsteklof@us.ibm.com>2003-10-21 01:19:14 -0700
committerGreg KH <gregkh@suse.de>2005-04-26 21:01:42 -0700
commitfe3fe3b29ffbc7d0ce7dca6a371da31d8b3ff7f8 (patch)
treefd2071c7c28b780d1509f32d8cc93c41405eceb2 /libsysfs/dlist.h
parent3370fb2152d5c812ed4a48b9108a97b446713c9d (diff)
[PATCH] new version of libsysfs patch
Here's the patch applying the latest libsysfs. - adds the latest libsysfs code to udev * new code includes dlist implementation, a generic linked list implementation. Needed our own because LGPL * rearranged structures * provided more functions for accessing directory and attributes - gets rid of ->directory->path references in namedev.c - replaces sysfs_get_value_from_attributes with sysfs_get_classdev_attr
Diffstat (limited to 'libsysfs/dlist.h')
-rw-r--r--libsysfs/dlist.h195
1 files changed, 195 insertions, 0 deletions
diff --git a/libsysfs/dlist.h b/libsysfs/dlist.h
new file mode 100644
index 0000000000..5da79f9ba2
--- /dev/null
+++ b/libsysfs/dlist.h
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+/*
+ * dlist.h
+ *
+ * Copyright (C) 2003 Eric J Bohm
+ *
+ * This 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.
+ *
+ * This 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#ifndef _DLIST_H_
+#define _DLIST_H_
+
+/* Double linked list header.
+
+* navigate your list with DLIST_PREV and DLIST_NEXT. These are macros
+* so function call overhead is minimized.
+
+* Supports perl style push, pop, shift, unshift list semantics.
+
+* You allocate the data and give dlist the pointer. If your data is
+* complex set the dlist->del_func to a an appropriate delete using
+* dlist_new_with_delete. Your delete function must match
+(void * )(del(void *)
+*Otherwise dlist will just use free.
+
+* NOTE: The small amount of pain involved in doing that allows us to
+* avoid copy in copy out semantics.
+
+* Dlist uses an internal mark pointer to keep track of where you are
+* in the list.
+
+* insert and delete take a directional parameter. Where direction
+* corresponds to the direction in which you want the list to go.
+* true direction corresponded to progressing forward in the last
+* false to regressing in the list.
+* so a dlist_insert(yourlist,item,1) will insert it after the mark
+* so a dlist_insert(yourlist,item,0) will insert it before the mark
+* any insert will move the mark to the new node regardless of the direction.
+
+* Just use the dlist_(insert|delete)_(before|after) macros if you do not want
+* to think about it.
+
+*/
+#include <malloc.h>
+typedef struct dl_node {
+ struct dl_node *prev;
+ struct dl_node *next;
+ void *data;
+} DL_node;
+
+typedef struct dlist {
+ DL_node *marker;
+ unsigned long count;
+ size_t data_size;
+ void (*del_func)(void *);
+ DL_node headnode;
+ DL_node *head;
+} Dlist;
+
+Dlist *dlist_new(size_t datasize);
+Dlist *dlist_new_with_delete(size_t datasize,void (*del_func)(void*));
+void *_dlist_mark_move(Dlist *list,int direction);
+void *dlist_mark(Dlist *);
+void dlist_start(Dlist *);
+void dlist_end(Dlist *);
+
+void *dlist_insert(Dlist *,void *,int) ;
+
+void *dlist_insert_sorted(struct dlist *list, void *new, int (*sorter)(void *, void *));
+
+void dlist_delete(Dlist *,int);
+
+void dlist_push(Dlist *,void *);
+
+void dlist_unshift(Dlist *,void *);
+
+void *dlist_pop(Dlist *);
+
+void *dlist_shift(Dlist *);
+
+void dlist_destroy(Dlist *);
+
+void *dlist_find_custom(struct dlist *list, void *target, int (*comp)(void *, void *));
+void dlist_transform(struct dlist *list, void (*node_operation)(void *));
+
+
+/*
+ * _dlist_remove is for internal use only
+ * _dlist_mark_move is for internal use only
+ */
+void *_dlist_remove(struct dlist *,struct dl_node *,int );
+
+#define dlist_prev(A) _dlist_mark_move((A),0)
+#define dlist_next(A) _dlist_mark_move((A),1)
+
+#define dlist_insert_before(A,B) dlist_insert((A),(B),0)
+#define dlist_insert_after(A,B) dlist_insert((A),(B),1)
+
+#define dlist_delete_before(A) dlist_delete((A),0)
+#define dlist_delete_after(A) dlist_delete((A),1)
+
+/**
+ * provide for loop header which iterates the mark from start to end
+ * list: the dlist pointer, use dlist_mark(list) to get iterator
+ */
+#define dlist_for_each(list) \
+ for(dlist_start(list),dlist_next(list); \
+ (list)->marker!=(list)->head;dlist_next(list))
+
+/**
+ * provide for loop header which iterates the mark from end to start
+ * list: the dlist pointer, use dlist_mark(list) to get iterator
+ */
+#define dlist_for_each_rev(list) \
+ for(dlist_end(list),dlist_prev(list); \
+ (list)->marker!=(list)->head;dlist_prev(list))
+
+/**
+ * provide for loop header which iterates through the list without moving mark
+ * list: the dlist_pointer
+ * iterator: dl_node pointer to iterate
+ */
+#define dlist_for_each_nomark(list,iterator) \
+ for((iterator)=(list)->head->next; (iterator)!=(list)->head; \
+ (iterator)=(iterator)->next)
+
+/**
+ * provide for loop header which iterates through the list without moving mark
+ * in reverse
+ * list: the dlist_pointer
+ * iterator: dl_node pointer to iterate
+ */
+#define dlist_for_each_nomark_rev(list,iterator) \
+ for((iterator)=(list)->head->prev; (iterator)!=(list)->head; \
+ (iterator)=(iterator)->prev)
+/**
+ * provide for loop header which iterates through the list providing a
+ * data iterator
+ * list: the dlist pointer
+ * data_iterator: the pointer of type datatype to iterate
+ * datatype: actual type of the contents in the dl_node->data
+ */
+
+#define dlist_for_each_data(list,data_iterator,datatype) \
+ for(dlist_start(list), (data_iterator)=(datatype *) dlist_next(list); \
+ (list)->marker!=(list)->head;(data_iterator)=(datatype *) dlist_next(list))
+
+/**
+ * provide for loop header which iterates through the list providing a
+ * data iterator in reverse
+ * list: the dlist pointer
+ * data_iterator: the pointer of type datatype to iterate
+ * datatype: actual type of the contents in the dl_node->data
+ */
+#define dlist_for_each_data_rev(list,data_iterator,datatype) \
+ for(dlist_end(list), (data_iterator)=(datatype *) dlist_prev(list); \
+ (list)->marker!=(list)->head;(data_iterator)=(datatype *) dlist_prev(list))
+
+/**
+ * provide for loop header which iterates through the list providing a
+ * data iterator without moving the mark
+ * list: the dlist pointer
+ * iterator: the dl_node pointer to iterate
+ * data_iterator: the pointer of type datatype to iterate
+ * datatype: actual type of the contents in the dl_node->data
+ */
+
+#define dlist_for_each_data_nomark(list,iterator,data_iterator,datatype) \
+ for((iterator)=(list)->head->next, (data_iterator)=(datatype *) (iterator)->data; \
+ (iterator)!=(list)->head;(iterator)=(iterator)->next,(data_iterator)=(datatype *) (iterator))
+
+/**
+ * provide for loop header which iterates through the list providing a
+ * data iterator in reverse without moving the mark
+ * list: the dlist pointer
+ * iterator: the dl_node pointer to iterate
+ * data_iterator: the pointer of type datatype to iterate
+ * datatype: actual type of the contents in the dl_node->data
+ */
+#define dlist_for_each_data_nomark_rev(list,iterator, data_iterator,datatype) \
+ for((iterator)=(list)->head->prev, (data_iterator)=(datatype *) (iterator)->data; \
+ (iterator)!=(list)->head;(iterator)=(iterator)->prev,(data_iterator)=(datatype *) (iterator))
+
+#endif /* _DLIST_H_ */