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/*
* list2.h
*
* $Id$
*
* Doubly linked list
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2012 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef __LIST2_H
#define __LIST2_H
/*#ifdef MALLOC_DEBUG
#define L2_DEBUG
#endif*/
#ifdef L2_DEBUG
#define L2_ASSERT_SOLO(elt, ep) { \
if (NULL != elt->ep##prev) \
{ \
if (elt == elt->ep##prev->ep##next) \
GPF_T1("L2_DEBUG: elt is next of prev of elt before insert, about to destroy other list"); \
} \
if (NULL != elt->ep##next) \
{ \
if (elt == elt->ep##next->ep##prev) \
GPF_T1("L2_DEBUG: elt is prev of next of elt before insert, about to destroy other list"); \
} \
}
#define L2_ASSERT_PROPER_ENDS(first, last, ep) { \
if (NULL != first) \
{ \
if (NULL == last) GPF_T1("L2_DEBUG: last is NULL but first is not"); \
if (NULL != first->ep##prev) GPF_T1("L2_DEBUG: _prev of first is not NULL"); \
if (NULL != last->ep##next) GPF_T1("L2_DEBUG: _next of last is not NULL"); \
} \
else \
if (NULL != last) GPF_T1("L2_DEBUG: first is NULL but last is not"); \
}
#define L2_ASSERT_CONNECTION(first, last, ep) { \
int __prev_ofs = ((char *)(&(first->ep##prev))) - ((char *)(first)); \
int __next_ofs = ((char *)(&(first->ep##next))) - ((char *)(first)); \
char *__iprev = NULL; \
char *__iter = (void *)first; \
while (__iter != last) { \
if (NULL == __iter) GPF_T1("L2_DEBUG: last not found to the right of first"); \
__iter = ((char **)(__iter + __next_ofs))[0]; \
} \
}
#define L2_ASSERT_DISCONNECTION(first, outer, ep) { \
int __prev_ofs = ((char *)(&(first->ep##prev))) - ((char *)(first)); \
int __next_ofs = ((char *)(&(first->ep##next))) - ((char *)(first)); \
char *__iprev = NULL; \
char *__iter = (void *)first; \
while (NULL != __iter) { \
if (outer == __iter) GPF_T1("L2_DEBUG: unexpected occurrence of outer to the right of first"); \
__iter = ((char **)(__iter + __next_ofs))[0]; \
} \
}
#else
#define L2_ASSERT_SOLO(elt, ep)
#define L2_ASSERT_PROPER_ENDS(first, last, ep)
#define L2_ASSERT_CONNECTION(first, last, ep)
#define L2_ASSERT_DISCONNECTION(first, outer, ep)
#endif
#define L2_PUSH(first, last, elt, ep) \
{ \
L2_ASSERT_SOLO(elt, ep) \
L2_ASSERT_PROPER_ENDS(first, last, ep) \
L2_ASSERT_CONNECTION(first, last, ep) \
L2_ASSERT_DISCONNECTION(first, elt, ep) \
elt->ep##next = first; \
if (first) \
first->ep##prev = elt; \
elt->ep##prev = NULL; \
if (!last) last = elt; \
first = elt; \
}
#define L2_PUSH_LAST(first, last, elt, ep) \
{ \
L2_ASSERT_SOLO(elt, ep) \
L2_ASSERT_PROPER_ENDS(first, last, ep) \
L2_ASSERT_CONNECTION(first, last, ep) \
L2_ASSERT_DISCONNECTION(first, elt, ep) \
elt->ep##prev = last; \
if (last) \
last->ep##next = elt; \
elt->ep##next = NULL; \
if (!first) first = elt; \
last = elt; \
}
#define L2_DELETE(first, last, elt, ep) \
{ \
L2_ASSERT_PROPER_ENDS(first, last, ep) \
L2_ASSERT_CONNECTION(first, elt, ep) \
L2_ASSERT_CONNECTION(elt, last, ep) \
if (elt->ep##prev) \
elt->ep##prev->ep##next = elt->ep##next; \
if (elt->ep##next) \
elt->ep##next->ep##prev = elt->ep##prev; \
if (elt == first) \
first = elt->ep##next; \
if (elt == last) \
last = elt->ep##prev; \
elt->ep##prev = elt->ep##next = NULL; \
}
#define L2_INSERT(first, last, before, it, ep) \
{ \
L2_ASSERT_PROPER_ENDS(first, last, ep) \
L2_ASSERT_CONNECTION(first, before, ep) \
L2_ASSERT_CONNECTION(before, last, ep) \
if (before != it->ep##next) \
{ \
L2_ASSERT_SOLO(it, ep) \
L2_ASSERT_DISCONNECTION(first, it, ep) \
} \
L2_ASSERT_DISCONNECTION(first, it, ep) \
if (before == first) \
{ \
L2_PUSH (first, last, it, ep); \
} \
else \
{ \
it->ep##prev = before->ep##prev; \
it->ep##next = before; \
before->ep##prev->ep##next = it; \
before->ep##prev = it; \
} \
}
#define L2_INSERT_AFTER(first, last, after, it, ep) \
{ \
L2_ASSERT_PROPER_ENDS(first, last, ep) \
if (!after) \
{ \
L2_ASSERT_SOLO(it, ep) \
L2_ASSERT_DISCONNECTION(first, it, ep) \
L2_ASSERT_CONNECTION(first, last, ep) \
L2_PUSH (first, last, it, ep); \
} \
else \
{ \
if (after != it->ep##prev) \
{ \
L2_ASSERT_SOLO(it, ep) \
L2_ASSERT_DISCONNECTION(first, it, ep) \
} \
L2_ASSERT_CONNECTION(first, after, ep) \
L2_ASSERT_CONNECTION(after, last, ep) \
it->ep##next = after->ep##next; \
it->ep##prev = after; \
after->ep##next = it; \
if (it->ep##next) \
it->ep##next->ep##prev = it; \
else \
last = it; \
} \
}
#endif
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