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https://github.com/SCST-project/scst.git
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20a2e4ae8d
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@408 d57e44dd-8a1f-0410-8b47-8ef2f437770f
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/*
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* Copyright (C) 2007 - 2008 Vladislav Bolkhovitin
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* Copyright (C) 2007 - 2008 CMS Distribution Limited
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2
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* of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef MISC_H
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#define MISC_H
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struct qelem {
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struct qelem *q_forw;
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struct qelem *q_back;
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};
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/* stolen list stuff from Linux kernel */
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#undef offsetof
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#ifdef __compiler_offsetof
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#define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
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#else
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#endif
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#define LIST_HEAD_INIT(name) { &(name), &(name) }
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#define LIST_HEAD(name) \
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struct qelem name = LIST_HEAD_INIT(name)
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#define INIT_LIST_HEAD(ptr) do { \
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(ptr)->q_forw = (ptr); (ptr)->q_back = (ptr); \
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} while (0)
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static inline int list_empty(const struct qelem *head)
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{
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return head->q_forw == head;
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}
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static inline int list_length_is_one(const struct qelem *head)
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{
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return head->q_forw == head->q_back;
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}
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#define container_of(ptr, type, member) ({ \
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const typeof( ((type *)0)->member ) *__mptr = (ptr); \
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(type *)( (char *)__mptr - offsetof(type,member) );})
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#define list_entry(ptr, type, member) \
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container_of(ptr, type, member)
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#define list_for_each_entry(pos, head, member) \
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for (pos = list_entry((head)->q_forw, typeof(*pos), member); \
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&pos->member != (head); \
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pos = list_entry(pos->member.q_forw, typeof(*pos), member))
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#define list_for_each_entry_safe(pos, n, head, member) \
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for (pos = list_entry((head)->q_forw, typeof(*pos), member), \
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n = list_entry(pos->member.q_forw, typeof(*pos), member); \
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&pos->member != (head); \
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pos = n, n = list_entry(n->member.q_forw, typeof(*n), member))
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#ifndef IPV6_V6ONLY
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#define IPV6_V6ONLY 26
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#endif
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#endif
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