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/* $OpenLDAP: pkg/ldap/libraries/libldap_r/rq.c,v 1.6.2.8 2005/01/20 17:01:02 kurt Exp $ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2003-2005 The OpenLDAP Foundation.
* Portions Copyright 2003 IBM Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* This work was initially developed by Jong Hyuk Choi for inclusion
* in OpenLDAP Software.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/stdarg.h>
#include <ac/stdlib.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include "ldap-int.h"
#include "ldap_pvt_thread.h"
#include "ldap_queue.h"
#include "ldap_rq.h"
void
ldap_pvt_runqueue_insert(
struct runqueue_s* rq,
time_t interval,
ldap_pvt_thread_start_t *routine,
void *arg
)
{
struct re_s* entry;
entry = (struct re_s *) LDAP_CALLOC( 1, sizeof( struct re_s ));
entry->interval.tv_sec = interval;
entry->interval.tv_usec = 0;
entry->next_sched.tv_sec = time( NULL );
entry->next_sched.tv_usec = 0;
entry->routine = routine;
entry->arg = arg;
LDAP_STAILQ_INSERT_TAIL( &rq->task_list, entry, tnext );
}
void
ldap_pvt_runqueue_remove(
struct runqueue_s* rq,
struct re_s* entry
)
{
struct re_s* e;
LDAP_STAILQ_FOREACH( e, &rq->task_list, tnext ) {
if ( e == entry)
break;
}
assert( e == entry );
LDAP_STAILQ_REMOVE( &rq->task_list, entry, re_s, tnext );
LDAP_FREE( entry );
}
struct re_s*
ldap_pvt_runqueue_next_sched(
struct runqueue_s* rq,
struct timeval** next_run
)
{
struct re_s* entry;
entry = LDAP_STAILQ_FIRST( &rq->task_list );
if ( entry == NULL ) {
*next_run = NULL;
return NULL;
} else if ( entry->next_sched.tv_sec == 0 ) {
*next_run = NULL;
return NULL;
} else {
*next_run = &entry->next_sched;
return entry;
}
}
void
ldap_pvt_runqueue_runtask(
struct runqueue_s* rq,
struct re_s* entry
)
{
LDAP_STAILQ_INSERT_TAIL( &rq->run_list, entry, rnext );
}
void
ldap_pvt_runqueue_stoptask(
struct runqueue_s* rq,
struct re_s* entry
)
{
LDAP_STAILQ_REMOVE( &rq->run_list, entry, re_s, rnext );
}
int
ldap_pvt_runqueue_isrunning(
struct runqueue_s* rq,
struct re_s* entry
)
{
struct re_s* e;
LDAP_STAILQ_FOREACH( e, &rq->run_list, rnext ) {
if ( e == entry ) {
return 1;
}
}
return 0;
}
void
ldap_pvt_runqueue_resched(
struct runqueue_s* rq,
struct re_s* entry,
int defer
)
{
struct re_s* prev;
struct re_s* e;
LDAP_STAILQ_FOREACH( e, &rq->task_list, tnext ) {
if ( e == entry )
break;
}
assert ( e == entry );
LDAP_STAILQ_REMOVE( &rq->task_list, entry, re_s, tnext );
if ( !defer ) {
entry->next_sched.tv_sec = time( NULL ) + entry->interval.tv_sec;
} else {
entry->next_sched.tv_sec = 0;
}
if ( LDAP_STAILQ_EMPTY( &rq->task_list )) {
LDAP_STAILQ_INSERT_HEAD( &rq->task_list, entry, tnext );
} else if ( entry->next_sched.tv_sec == 0 ) {
LDAP_STAILQ_INSERT_TAIL( &rq->task_list, entry, tnext );
} else {
prev = NULL;
LDAP_STAILQ_FOREACH( e, &rq->task_list, tnext ) {
if ( e->next_sched.tv_sec == 0 ) {
if ( prev == NULL ) {
LDAP_STAILQ_INSERT_HEAD( &rq->task_list, entry, tnext );
} else {
LDAP_STAILQ_INSERT_AFTER( &rq->task_list, prev, entry, tnext );
}
return;
} else if ( e->next_sched.tv_sec > entry->next_sched.tv_sec ) {
if ( prev == NULL ) {
LDAP_STAILQ_INSERT_HEAD( &rq->task_list, entry, tnext );
} else {
LDAP_STAILQ_INSERT_AFTER( &rq->task_list, prev, entry, tnext );
}
return;
}
prev = e;
}
LDAP_STAILQ_INSERT_TAIL( &rq->task_list, entry, tnext );
}
}
int
ldap_pvt_runqueue_persistent_backload(
struct runqueue_s* rq
)
{
struct re_s* e;
int count = 0;
ldap_pvt_thread_mutex_lock( &rq->rq_mutex );
if ( !LDAP_STAILQ_EMPTY( &rq->task_list )) {
LDAP_STAILQ_FOREACH( e, &rq->task_list, tnext ) {
if ( e->next_sched.tv_sec == 0 )
count++;
}
}
ldap_pvt_thread_mutex_unlock( &rq->rq_mutex );
return count;
}
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