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* Copyright (C) 2011 Paulo Alcantara <>
* This program 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; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* 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.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#ifndef _RUNLIST_H_
#define _RUNLIST_H_
struct runlist_element {
uint64_t vcn;
int64_t lcn;
uint64_t len;
struct runlist {
struct runlist_element run;
struct runlist *next;
static struct runlist *tail;
static inline bool runlist_is_empty(struct runlist *rlist)
return !rlist;
static inline struct runlist *runlist_alloc(void)
struct runlist *rlist;
rlist = malloc(sizeof *rlist);
if (!rlist)
malloc_error("runlist structure");
rlist->next = NULL;
return rlist;
static inline void runlist_append(struct runlist **rlist,
struct runlist_element *elem)
struct runlist *n = runlist_alloc();
n->run = *elem;
if (runlist_is_empty(*rlist)) {
*rlist = n;
tail = n;
} else {
tail->next = n;
tail = n;
static inline struct runlist *runlist_remove(struct runlist **rlist)
struct runlist *ret;
if (runlist_is_empty(*rlist))
return NULL;
ret = *rlist;
*rlist = ret->next;
return ret;
#endif /* _RUNLIST_H_ */