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/* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 2014 Couchbase, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef LCB_SLIST_H
#define LCB_SLIST_H
struct slist_node_st;
typedef struct slist_node_st {
struct slist_node_st *next;
} sllist_node;
typedef struct {
sllist_node first_prev;
sllist_node *last;
} sllist_root;
/**
* Indicates whether the list is empty or not
*/
#define SLLIST_FIRST(list) (list)->first_prev.next
#define SLLIST_LAST(list) (list)->last
#define SLLIST_IS_EMPTY(list) (SLLIST_LAST(list) == NULL)
#define SLLIST_IS_ONE(list) (SLLIST_FIRST(list) && SLLIST_FIRST(list) == SLLIST_LAST(list))
/**
* Iterator for list. This can be used as the 'for' statement; as such this
* macro should look like such:
*
* slist_node *ii;
* SLIST_FOREACH(list, ii) {
* my_item *item = LCB_LIST_ITEM(my_item, ii, slnode);
* }
*
* @param list the list to iterate
* @param pos a local variable to use as the iterator
*/
#define SLLIST_FOREACH(list, pos) \
for (pos = SLLIST_FIRST(list); pos; pos = pos->next)
typedef struct sllist_iterator_st {
sllist_node *cur;
sllist_node *prev;
sllist_node *next;
int removed;
} sllist_iterator;
#define sllist_iter_end(list, iter) ((iter)->cur == NULL)
#define SLLIST_ITEM(ptr, type, member) \
((type *) (void *) ((char *)(ptr) - offsetof(type, member)))
#define SLLIST_ITERFOR(list, iter) \
for (slist_iter_init(list, iter); \
!sllist_iter_end(list, iter); \
slist_iter_incr(list, iter))
#define SLLIST_ITERBASIC(list, elem) \
for (elem = SLLIST_FIRST(list); elem; elem = elem->next)
#endif