+++ /dev/null
-/**
- * \file
- * <!--
- * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
- * Copyright 2001 Bernardo Innocenti <bernie@develer.com>
- * This file is part of DevLib - See README.devlib for information.
- * -->
- *
- * \version $Id$
- *
- * \author Bernardo Innocenti <bernie@develer.com>
- *
- * \brief General pourpose double-linked lists
- */
-
-/*#*
- *#* $Log$
- *#* Revision 1.20 2006/07/19 12:56:28 bernie
- *#* Convert to new Doxygen style.
- *#*
- *#* Revision 1.19 2006/03/20 17:50:29 bernie
- *#* Fix typo.
- *#*
- *#* Revision 1.18 2006/02/27 22:40:21 bernie
- *#* Add support for poor pre-C99 compilers.
- *#*
- *#* Revision 1.17 2006/02/24 01:18:34 bernie
- *#* LIST_ENQUEUE(): New macro; Remove obsolete names.
- *#*
- *#* Revision 1.16 2006/01/23 23:10:38 bernie
- *#* REVERSE_FOREACH_NODE(): New macro; FOREACHNODE(): Rename to FOREACH_NODE.
- *#*
- *#* Revision 1.15 2005/11/04 16:20:02 bernie
- *#* Fix reference to README.devlib in header.
- *#*
- *#* Revision 1.14 2005/07/19 07:25:18 bernie
- *#* Refactor to remove type aliasing problems.
- *#*
- *#* Revision 1.13 2005/04/11 19:10:28 bernie
- *#* Include top-level headers from cfg/ subdir.
- *#*
- *#* Revision 1.12 2005/01/22 04:21:32 bernie
- *#* Add integrity checks.
- *#*
- *#* Revision 1.11 2004/12/31 16:44:11 bernie
- *#* list_remHead(), list_remTail(): Name like normal functions.
- *#*
- *#* Revision 1.10 2004/11/28 23:21:05 bernie
- *#* Remove obsolete INITLIST macro.
- *#*
- *#* Revision 1.9 2004/10/21 09:37:55 bernie
- *#* Revamp documentation.
- *#*
- *#* Revision 1.8 2004/10/19 08:46:34 bernie
- *#* Fix header.
- *#*
- *#* Revision 1.7 2004/08/25 14:12:09 rasky
- *#* Aggiornato il comment block dei log RCS
- *#*
- *#* Revision 1.6 2004/07/30 14:34:10 rasky
- *#* Vari fix per documentazione e commenti
- *#* Aggiunte PP_CATn e STATIC_ASSERT
- *#*
- *#* Revision 1.5 2004/07/20 23:45:01 bernie
- *#* Finally remove redundant protos.
- *#*
- *#* Revision 1.4 2004/07/18 22:12:53 bernie
- *#* Fix warnings with GCC 3.3.2.
- *#*
- *#* Revision 1.3 2004/07/18 22:01:43 bernie
- *#* REMHEAD(), REMTAIL(): Move to list.h as inline functions.
- *#*
- *#* Revision 1.2 2004/06/03 11:27:09 bernie
- *#* Add dual-license information.
- *#*
- *#* Revision 1.1 2004/05/23 15:43:16 bernie
- *#* Import mware modules.
- *#*
- *#*/
-#ifndef MWARE_LIST_H
-#define MWARE_LIST_H
-
-#include <cfg/compiler.h> /* INLINE */
-#include <cfg/debug.h> /* ASSERT() */
-
-/**
- * This structure represents a node for bidirectional lists.
- *
- * Data is usually appended to nodes by making them the first
- * field of another struture, as a poor-man's form of inheritance.
- */
-typedef struct _Node
-{
- struct _Node *succ;
- struct _Node *pred;
-} Node;
-
-/**
- * Head of a doubly-linked list of \c Node structs.
- *
- * Lists must be initialized with LIST_INIT() prior to use.
- *
- * Nodes can be added and removed from either end of the list
- * with O(1) performance. Iterating over these lists can be
- * tricky: use the FOREACH_NODE() macro instead.
- */
-typedef struct _List
-{
- Node head;
- Node tail;
-} List;
-
-/**
- * Extended node for priority queues.
- */
-typedef struct _PriNode
-{
- Node link;
- int pri;
-} PriNode;
-
-
-/**
- * Template for a naked node in a list of \a T structures.
- *
- * To be used as data member in other structures:
- *
- * \code
- * struct Foo
- * {
- * DECLARE_NODE_ANON(struct Foo)
- * int a;
- * float b;
- * }
- *
- * DECLARE_LIST_TYPE(Foo);
- *
- * void foo(void)
- * {
- * static LIST_TYPE(Foo) foo_list;
- * static Foo foo1, foo2;
- * Foo *fp;
- *
- * LIST_INIT(&foo_list);
- * ADDHEAD(&foo_list, &foo1);
- * INSERT_BEFORE(&foo_list, &foo2);
- * FOREACH_NODE(fp, &foo_list)
- * fp->a = 10;
- * }
- *
- * \endcode
- */
-#define DECLARE_NODE_ANON(T) \
- T *succ; T *pred;
-
-/** Declare a typesafe node for structures of type \a T. */
-#define DECLARE_NODE_TYPE(T) \
- typedef struct T##Node { T *succ; T *pred; } T##Node
-
-/** Template for a list of \a T structures. */
-#define DECLARE_LIST_TYPE(T) \
- DECLARE_NODE_TYPE(T); \
- typedef struct T##List { \
- T##Node head; \
- T##Node tail; \
- } T##List
-
-#define NODE_TYPE(T) T##Node
-#define LIST_TYPE(T) T##List
-
-/**
- * Get a pointer to the first node in a list.
- *
- * If \a l is empty, result points to l->tail.
- */
-#define LIST_HEAD(l) ((l)->head.succ)
-
-/**
- * Get a pointer to the last node in a list.
- *
- * If \a l is empty, result points to l->head.
- */
-#define LIST_TAIL(l) ((l)->tail.pred)
-
-// TODO: move in compiler.h
-#if COMPILER_TYPEOF
- #define TYPEOF_OR_VOIDPTR(type) typeof(type)
-#else
- #define TYPEOF_OR_VOIDPTR(type) void *
-#endif
-
-/**
- * Iterate over all nodes in a list.
- *
- * This macro generates a "for" statement using the following parameters:
- * \param n Node pointer to be used in each iteration.
- * \param l Pointer to list.
- */
-#define FOREACH_NODE(n, l) \
- for( \
- (n) = (TYPEOF_OR_VOIDPTR(n))LIST_HEAD(l); \
- ((Node *)(n))->succ; \
- (n) = (TYPEOF_OR_VOIDPTR(n))(((Node *)(n))->succ) \
- )
-
-/**
- * Iterate backwards over all nodes in a list.
- *
- * This macro generates a "for" statement using the following parameters:
- * \param n Node pointer to be used in each iteration.
- * \param l Pointer to list.
- */
-#define REVERSE_FOREACH_NODE(n, l) \
- for( \
- (n) = (TYPEOF_OR_VOIDPTR(n))LIST_TAIL(l); \
- ((Node *)(n))->pred; \
- (n) = (TYPEOF_OR_VOIDPTR(n))(((Node *)(n))->pred) \
- )
-
-/** Initialize a list. */
-#define LIST_INIT(l) \
- do { \
- (l)->head.succ = (TYPEOF_OR_VOIDPTR((l)->head.succ)) &(l)->tail; \
- (l)->head.pred = NULL; \
- (l)->tail.succ = NULL; \
- (l)->tail.pred = (TYPEOF_OR_VOIDPTR((l)->tail.pred)) &(l)->head; \
- } while (0)
-
-#ifdef _DEBUG
- /** Make sure that a list is valid (it was initialized and is not corrupted). */
- #define LIST_ASSERT_VALID(l) \
- do { \
- Node *n, *pred; \
- ASSERT((l)->head.succ != NULL); \
- ASSERT((l)->head.pred == NULL); \
- ASSERT((l)->tail.succ == NULL); \
- ASSERT((l)->tail.pred != NULL); \
- pred = &(l)->head; \
- FOREACH_NODE(n, l) \
- { \
- ASSERT(n->pred == pred); \
- pred = n; \
- } \
- ASSERT(n == &(l)->tail); \
- } while (0)
-
- #define INVALIDATE_NODE(n) ((n)->succ = (n)->pred = NULL)
-#else
- #define LIST_ASSERT_VALID(l) do {} while (0)
- #define INVALIDATE_NODE(n) do {} while (0)
-#endif
-
-/** Add node to list head. */
-#define ADDHEAD(l,n) \
- do { \
- ASSERT(l); \
- ASSERT(n); \
- (n)->succ = (l)->head.succ; \
- (n)->pred = (l)->head.succ->pred; \
- (n)->succ->pred = (n); \
- (n)->pred->succ = (n); \
- } while (0)
-
-/** Add node to list tail. */
-#define ADDTAIL(l,n) \
- do { \
- ASSERT(l); \
- ASSERT(n); \
- (n)->succ = &(l)->tail; \
- (n)->pred = (l)->tail.pred; \
- (n)->pred->succ = (n); \
- (l)->tail.pred = (n); \
- } while (0)
-
-/**
- * Insert node \a n before node \a ln.
- *
- * \note You can't pass in a list header as \a ln, but
- * it is safe to pass list-\>head of an empty list.
- */
-#define INSERT_BEFORE(n,ln) \
- do { \
- (n)->succ = (ln); \
- (n)->pred = (ln)->pred; \
- (ln)->pred->succ = (n); \
- (ln)->pred = (n); \
- } while (0)
-
-/**
- * Remove \a n from whatever list it is in.
- *
- * \note Removing a node that has not previously been
- * inserted into a list invokes undefined behavior.
- */
-#define REMOVE(n) \
- do { \
- (n)->pred->succ = (n)->succ; \
- (n)->succ->pred = (n)->pred; \
- INVALIDATE_NODE(n); \
- } while (0)
-
-/** Tell whether a list is empty. */
-#define LIST_EMPTY(l) ( (void *)((l)->head.succ) == (void *)(&(l)->tail) )
-
-/**
- * Insert a priority node in a priority queue.
- *
- * The new node is inserted immediately before the
- * first node with lower priority or appended to
- * the tail if no such node exists.
- */
-#define LIST_ENQUEUE(list, node) \
- do { \
- PriNode *ln; \
- FOREACH_NODE(ln, (list)) \
- if (ln->pri < (node)->pri) \
- break; \
- INSERT_BEFORE(&(node)->link, &ln->link); \
- } while (0)
-
-
-/**
- * Unlink a node from the head of the list \a l.
- *
- * \return Pointer to node, or NULL if the list was empty.
- */
-INLINE Node *list_remHead(List *l)
-{
- Node *n;
-
- if (LIST_EMPTY(l))
- return (Node *)0;
-
- n = l->head.succ; /* Get first node. */
- l->head.succ = n->succ; /* Link list head to second node. */
- n->succ->pred = &l->head; /* Link second node to list head. */
-
- INVALIDATE_NODE(n);
- return n;
-}
-
-/**
- * Unlink a node from the tail of the list \a l.
- *
- * \return Pointer to node, or NULL if the list was empty.
- */
-INLINE Node *list_remTail(List *l)
-{
- Node *n;
-
- if (LIST_EMPTY(l))
- return (Node *)0;
-
- n = l->tail.pred; /* Get last node. */
- l->tail.pred = n->pred; /* Link list tail to second last node. */
- n->pred->succ = &l->tail; /* Link second last node to list tail. */
-
- INVALIDATE_NODE(n);
- return n;
-}
-
-#endif /* MWARE_LIST_H */
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