minix/nbsd_include/ufs/chfs/ebh_misc.h
2011-12-22 23:07:23 +01:00

88 lines
3.4 KiB
C

/* $NetBSD: ebh_misc.h,v 1.1 2011/11/24 15:51:32 ahoka Exp $ */
/*-
* Copyright (c) 2010 Department of Software Engineering,
* University of Szeged, Hungary
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by the Department of Software Engineering, University of Szeged, Hungary
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef EBH_MISC_H_
#define EBH_MISC_H_
/******************************************************************************/
/* EBH specific functions */
/******************************************************************************/
#define CHFS_GET_MEMBER_POS(type, member) \
((unsigned long)(&((type *)0)->member))
#define CHFS_GET_LID(lid) (le32toh(lid) & CHFS_LID_DIRTY_BIT_MASK)
/**
* EBH_TREE_DESTROY - destroys an RB-tree and frees the memory of its elements.
* @name - the RB-tree structure's name
* @head - pointer to the RB-tree's head
* @type - type of the elements
*/
#define EBH_TREE_DESTROY(name, head, type) \
{ \
type *var, *nxt; \
for (var = RB_MIN(name, head); var != NULL; var = nxt) { \
nxt = RB_NEXT(name, head, var); \
RB_REMOVE(name, head, var); \
kmem_free(var, sizeof(type)); \
} \
}
/* XXX HACK! we need a clean solution for destroying mutexes in trees */
#define EBH_TREE_DESTROY_MUTEX(name, head, type) \
{ \
type *var, *nxt; \
for (var = RB_MIN(name, head); var != NULL; var = nxt) { \
nxt = RB_NEXT(name, head, var); \
RB_REMOVE(name, head, var); \
rw_destroy(&var->mutex); \
kmem_free(var, sizeof(type)); \
} \
}
/**
* EBH_QUEUE_DESTROY - destroys a TAILQ and frees the memory of its elements.
* @head: pointer to the head of the queue
* @type: type of the elements
* @entry: name of TAILQ_ENTRY
*/
#define EBH_QUEUE_DESTROY(head, type, entry) \
{ \
type *var; \
while ((var = TAILQ_FIRST(head))) { \
TAILQ_REMOVE(head, var, entry); \
kmem_free(var, sizeof(type)); \
} \
}
#endif /* EBH_MISC_H_ */