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/*
* $Id: timer.c,v 1.1.1.1 2005/06/13 16:47:43 bogdan_iancu Exp $
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of openser, a free SIP server.
*
* openser 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
*
* openser 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* History:
* --------
* 2005-05-02 flags field added to node stucture -better sync between timer
* and worker processes; some races eliminated (bogdan)
*/
#include <assert.h>
#include "../../dprint.h"
#include "timer.h"
#include "ip_tree.h"
inline void append_to_timer(struct list_link *head, struct list_link *new_ll )
{
DBG("DEBUG:pike:append_to_timer: %p in %p(%p,%p)\n",
new_ll, head,head->prev,head->next);
assert( !has_timer_set(new_ll) );
new_ll->prev = head->prev;
head->prev->next = new_ll;
head->prev = new_ll;
new_ll->next = head;
}
inline void remove_from_timer(struct list_link *head, struct list_link *ll)
{
DBG("DEBUG:pike:remove_from_timer: %p from %p(%p,%p)\n",
ll, head,head->prev,head->next);
assert( has_timer_set(ll) );
ll->next->prev = ll->prev;
ll->prev->next = ll->next;
ll->next = ll->prev = 0;
}
void update_in_timer(struct list_link *head, struct list_link *ll)
{
remove_from_timer( head, ll);
append_to_timer( head, ll);
}
/* "head" list MUST not be empty */
void check_and_split_timer(struct list_link *head, int time,
struct list_link *split, unsigned char *mask)
{
struct list_link *ll;
struct ip_node *node;
unsigned char b;
int i;
/* reset the mask */
for(i=0;i<32;mask[i++]=0);
ll = head->next;
while( ll!=head && (node=ll2ipnode(ll))->expires<=time) {
DBG("DEBUG:pike:check_and_split_timer: splitting %p(%p,%p)node=%p\n",
ll,ll->prev,ll->next, node);
/* mark the node as expired and un-mark it as being in timer list */
node->flags |= NODE_EXPIRED_FLAG;
node->flags &= ~NODE_INTIMER_FLAG;
b = node->branch;
ll=ll->next;
/*DBG("DEBUG:pike:check_and_split_timer: b=%d; [%d,%d]\n",
b,b>>3,1<<(b&0x07));*/
mask[b>>3] |= (1<<(b&0x07));
}
if (ll==head->next) {
/* nothing to return */
split->next = split->prev = split;
} else {
/* the detached list begins with current beginning */
split->next = head->next;
split->next->prev = split;
/* and we mark the end of the split list */
split->prev = ll->prev;
split->prev->next = split;
/* the shortened list starts from where we suspended */
head->next = ll;
ll->prev = head;
}
DBG("DEBUG:pike:check_and_split_timer: succ. to split (h=%p)(p=%p,n=%p)\n",
head,head->prev,head->next);
return;
}
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