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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/include/linux/plist.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/include/linux/plist.h')
-rw-r--r--ANDROID_3.4.5/include/linux/plist.h255
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diff --git a/ANDROID_3.4.5/include/linux/plist.h b/ANDROID_3.4.5/include/linux/plist.h
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-/*
- * Descending-priority-sorted double-linked list
- *
- * (C) 2002-2003 Intel Corp
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>.
- *
- * 2001-2005 (c) MontaVista Software, Inc.
- * Daniel Walker <dwalker@mvista.com>
- *
- * (C) 2005 Thomas Gleixner <tglx@linutronix.de>
- *
- * Simplifications of the original code by
- * Oleg Nesterov <oleg@tv-sign.ru>
- *
- * Licensed under the FSF's GNU Public License v2 or later.
- *
- * Based on simple lists (include/linux/list.h).
- *
- * This is a priority-sorted list of nodes; each node has a
- * priority from INT_MIN (highest) to INT_MAX (lowest).
- *
- * Addition is O(K), removal is O(1), change of priority of a node is
- * O(K) and K is the number of RT priority levels used in the system.
- * (1 <= K <= 99)
- *
- * This list is really a list of lists:
- *
- * - The tier 1 list is the prio_list, different priority nodes.
- *
- * - The tier 2 list is the node_list, serialized nodes.
- *
- * Simple ASCII art explanation:
- *
- * pl:prio_list (only for plist_node)
- * nl:node_list
- * HEAD| NODE(S)
- * |
- * ||------------------------------------|
- * ||->|pl|<->|pl|<--------------->|pl|<-|
- * | |10| |21| |21| |21| |40| (prio)
- * | | | | | | | | | | |
- * | | | | | | | | | | |
- * |->|nl|<->|nl|<->|nl|<->|nl|<->|nl|<->|nl|<-|
- * |-------------------------------------------|
- *
- * The nodes on the prio_list list are sorted by priority to simplify
- * the insertion of new nodes. There are no nodes with duplicate
- * priorites on the list.
- *
- * The nodes on the node_list are ordered by priority and can contain
- * entries which have the same priority. Those entries are ordered
- * FIFO
- *
- * Addition means: look for the prio_list node in the prio_list
- * for the priority of the node and insert it before the node_list
- * entry of the next prio_list node. If it is the first node of
- * that priority, add it to the prio_list in the right position and
- * insert it into the serialized node_list list
- *
- * Removal means remove it from the node_list and remove it from
- * the prio_list if the node_list list_head is non empty. In case
- * of removal from the prio_list it must be checked whether other
- * entries of the same priority are on the list or not. If there
- * is another entry of the same priority then this entry has to
- * replace the removed entry on the prio_list. If the entry which
- * is removed is the only entry of this priority then a simple
- * remove from both list is sufficient.
- *
- * INT_MIN is the highest priority, 0 is the medium highest, INT_MAX
- * is lowest priority.
- *
- * No locking is done, up to the caller.
- *
- */
-#ifndef _LINUX_PLIST_H_
-#define _LINUX_PLIST_H_
-
-#include <linux/kernel.h>
-#include <linux/list.h>
-
-struct plist_head {
- struct list_head node_list;
-};
-
-struct plist_node {
- int prio;
- struct list_head prio_list;
- struct list_head node_list;
-};
-
-/**
- * PLIST_HEAD_INIT - static struct plist_head initializer
- * @head: struct plist_head variable name
- */
-#define PLIST_HEAD_INIT(head) \
-{ \
- .node_list = LIST_HEAD_INIT((head).node_list) \
-}
-
-/**
- * PLIST_NODE_INIT - static struct plist_node initializer
- * @node: struct plist_node variable name
- * @__prio: initial node priority
- */
-#define PLIST_NODE_INIT(node, __prio) \
-{ \
- .prio = (__prio), \
- .prio_list = LIST_HEAD_INIT((node).prio_list), \
- .node_list = LIST_HEAD_INIT((node).node_list), \
-}
-
-/**
- * plist_head_init - dynamic struct plist_head initializer
- * @head: &struct plist_head pointer
- */
-static inline void
-plist_head_init(struct plist_head *head)
-{
- INIT_LIST_HEAD(&head->node_list);
-}
-
-/**
- * plist_node_init - Dynamic struct plist_node initializer
- * @node: &struct plist_node pointer
- * @prio: initial node priority
- */
-static inline void plist_node_init(struct plist_node *node, int prio)
-{
- node->prio = prio;
- INIT_LIST_HEAD(&node->prio_list);
- INIT_LIST_HEAD(&node->node_list);
-}
-
-extern void plist_add(struct plist_node *node, struct plist_head *head);
-extern void plist_del(struct plist_node *node, struct plist_head *head);
-
-/**
- * plist_for_each - iterate over the plist
- * @pos: the type * to use as a loop counter
- * @head: the head for your list
- */
-#define plist_for_each(pos, head) \
- list_for_each_entry(pos, &(head)->node_list, node_list)
-
-/**
- * plist_for_each_safe - iterate safely over a plist of given type
- * @pos: the type * to use as a loop counter
- * @n: another type * to use as temporary storage
- * @head: the head for your list
- *
- * Iterate over a plist of given type, safe against removal of list entry.
- */
-#define plist_for_each_safe(pos, n, head) \
- list_for_each_entry_safe(pos, n, &(head)->node_list, node_list)
-
-/**
- * plist_for_each_entry - iterate over list of given type
- * @pos: the type * to use as a loop counter
- * @head: the head for your list
- * @mem: the name of the list_struct within the struct
- */
-#define plist_for_each_entry(pos, head, mem) \
- list_for_each_entry(pos, &(head)->node_list, mem.node_list)
-
-/**
- * plist_for_each_entry_safe - iterate safely over list of given type
- * @pos: the type * to use as a loop counter
- * @n: another type * to use as temporary storage
- * @head: the head for your list
- * @m: the name of the list_struct within the struct
- *
- * Iterate over list of given type, safe against removal of list entry.
- */
-#define plist_for_each_entry_safe(pos, n, head, m) \
- list_for_each_entry_safe(pos, n, &(head)->node_list, m.node_list)
-
-/**
- * plist_head_empty - return !0 if a plist_head is empty
- * @head: &struct plist_head pointer
- */
-static inline int plist_head_empty(const struct plist_head *head)
-{
- return list_empty(&head->node_list);
-}
-
-/**
- * plist_node_empty - return !0 if plist_node is not on a list
- * @node: &struct plist_node pointer
- */
-static inline int plist_node_empty(const struct plist_node *node)
-{
- return list_empty(&node->node_list);
-}
-
-/* All functions below assume the plist_head is not empty. */
-
-/**
- * plist_first_entry - get the struct for the first entry
- * @head: the &struct plist_head pointer
- * @type: the type of the struct this is embedded in
- * @member: the name of the list_struct within the struct
- */
-#ifdef CONFIG_DEBUG_PI_LIST
-# define plist_first_entry(head, type, member) \
-({ \
- WARN_ON(plist_head_empty(head)); \
- container_of(plist_first(head), type, member); \
-})
-#else
-# define plist_first_entry(head, type, member) \
- container_of(plist_first(head), type, member)
-#endif
-
-/**
- * plist_last_entry - get the struct for the last entry
- * @head: the &struct plist_head pointer
- * @type: the type of the struct this is embedded in
- * @member: the name of the list_struct within the struct
- */
-#ifdef CONFIG_DEBUG_PI_LIST
-# define plist_last_entry(head, type, member) \
-({ \
- WARN_ON(plist_head_empty(head)); \
- container_of(plist_last(head), type, member); \
-})
-#else
-# define plist_last_entry(head, type, member) \
- container_of(plist_last(head), type, member)
-#endif
-
-/**
- * plist_first - return the first node (and thus, highest priority)
- * @head: the &struct plist_head pointer
- *
- * Assumes the plist is _not_ empty.
- */
-static inline struct plist_node *plist_first(const struct plist_head *head)
-{
- return list_entry(head->node_list.next,
- struct plist_node, node_list);
-}
-
-/**
- * plist_last - return the last node (and thus, lowest priority)
- * @head: the &struct plist_head pointer
- *
- * Assumes the plist is _not_ empty.
- */
-static inline struct plist_node *plist_last(const struct plist_head *head)
-{
- return list_entry(head->node_list.prev,
- struct plist_node, node_list);
-}
-
-#endif