112 lines
4.8 KiB
C
112 lines
4.8 KiB
C
/*
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Copyright (c) 2013 Anton Titov.
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Copyright (c) 2013 pCloud Ltd. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met: Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimer. Redistributions in binary form must reproduce the
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above copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution. Neither the name of pCloud Ltd nor the
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names of its contributors may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL pCloud
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Ltd BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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DAMAGE.
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*/
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#ifndef _PSYNC_LIST_H
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#define _PSYNC_LIST_H
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#include "pcompiler.h"
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#include <stddef.h>
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typedef struct _psync_list {
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struct _psync_list *next;
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struct _psync_list *prev;
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} psync_list;
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typedef int (*psync_list_compare)(const psync_list *, const psync_list *);
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#define psync_list_init(l) \
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do { \
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(l)->next = (l); \
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(l)->prev = (l); \
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} while (0)
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#define PSYNC_LIST_STATIC_INIT(l) \
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{ &l, &l }
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#define psync_list_isempty(l) ((l)->next == (l))
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#define psync_list_is_head(l, e) ((l)->next == (e))
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#define psync_list_is_tail(l, e) ((l)->prev == (e))
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static inline void psync_list_add_between(psync_list *l1, psync_list *l2,
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psync_list *a) {
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a->next = l2;
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a->prev = l1;
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l1->next = a;
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l2->prev = a;
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}
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#define psync_list_add_head(l, a) psync_list_add_between(l, (l)->next, a)
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#define psync_list_add_tail(l, a) psync_list_add_between((l)->prev, l, a)
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#define psync_list_add_before(e, a) psync_list_add_between((e)->prev, e, a)
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#define psync_list_add_after(e, a) psync_list_add_between(e, (e)->next, a)
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#define psync_list_del(a) \
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do { \
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(a)->next->prev = (a)->prev; \
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(a)->prev->next = (a)->next; \
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} while (0)
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#define psync_list_element(a, t, n) ((t *)((char *)(a)-offsetof(t, n)))
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#define psync_list_for_each(a, l) \
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for (a = (l)->next; psync_prefetch(a->next), a != (l); a = a->next)
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#define psync_list_for_each_safe(a, b, l) \
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for (a = (l)->next, b = a->next; psync_prefetch(b), a != (l); \
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a = b, b = b->next)
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#define psync_list_for_each_element(a, l, t, n) \
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for (a = psync_list_element((l)->next, t, n); \
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psync_prefetch(a->n.next), &a->n != (l); \
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a = psync_list_element(a->n.next, t, n))
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#define psync_list_for_each_element_call(l, t, n, c) \
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do { \
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psync_list *___tmpa, *___tmpb; \
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psync_list_for_each_safe(___tmpa, ___tmpb, l) \
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c(psync_list_element(___tmpa, t, n)); \
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} while (0)
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static inline psync_list *psync_list_remove_head(psync_list *l) {
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l = l->next;
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psync_list_del(l);
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return l;
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}
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#define psync_list_remove_head_element(l, t, n) \
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psync_list_element(psync_list_remove_head(l), t, n)
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void psync_list_sort(psync_list *l, psync_list_compare cmp);
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void psync_list_extract_repeating(psync_list *l1, psync_list *l2,
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psync_list *extracted1,
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psync_list *extracted2,
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psync_list_compare cmp);
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#endif
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