cleanup.c

openPBS的开放源代码

/*
*         OpenPBS (Portable Batch System) v2.3 Software License
* 
* Copyright (c) 1999-2000 Veridian Information Solutions, Inc.
* All rights reserved.
* 
* ---------------------------------------------------------------------------
* For a license to use or redistribute the OpenPBS software under conditions
* other than those described below, or to purchase support for this software,
* please contact Veridian Systems, PBS Products Department ("Licensor") at:
* 
*    www.OpenPBS.org  [phone]                  [e-mail]
*                        877 902-4PBS (US toll-free)
* ---------------------------------------------------------------------------
* 
* This license covers use of the OpenPBS v2.3 software (the "Software") at
* your site or location, and, for certain users, redistribution of the
* Software to other sites and locations.  Use and redistribution of
* OpenPBS v2.3 in source and binary forms, with or without modification,
* are permitted provided that all of the following conditions are met.
* After December 31, 2001, only conditions 3-6 must be met:
* 
* 1. Commercial and/or non-commercial use of the Software is permitted
*    provided a current software registration is on file at www.OpenPBS.org.
*    If use of this software contributes to a publication, product, or
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*    expectation of revenue generated as a consequence of redistributing
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*/
/* $Id: cleanup.c,v 1.2.4.4 2000/09/13 23:09:05 jjones Exp $ */

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/param.h>
#if defined(sgi)
#include <sys/sysmacros.h>
#endif
#include <string.h>

/* Scheduler header files */
#include "toolkit.h"
#include "gblxvars.h"

/* PBS header files */
#include "pbs_error.h"
#include "log.h"

static int cleanup_queue(Queue *queue);
int cleanup_rsrcs(Resources *rlist);

  
/*
**	Remove information from the queues in schd_SubmitQueue and
**	schd_BatchQueues.  Leave the lists in place.
**
**	Completely remove schd_AllJobs and schd_RsrcsList.
*/

int 
schd_cleanup(void)
{
    QueueList *qptr;

    for (qptr = schd_SubmitQueue; qptr != NULL; qptr = qptr->next)
	cleanup_queue(qptr->queue);

    for (qptr = schd_BatchQueues; qptr != NULL; qptr = qptr->next)
	cleanup_queue(qptr->queue);

    if (schd_AllJobs) {
	schd_free_jobs(schd_AllJobs);
	schd_AllJobs = NULL;
    }

    if (schd_RsrcsList) {
	cleanup_rsrcs(schd_RsrcsList);
	schd_RsrcsList = NULL;
    }

    return (0);
}

/*
**	Remove information from a Queue.  It will still exist, just
**	in a "clean" state.
*/

static int
cleanup_queue(Queue *queue)
{
    char *qname, *exechost;
    time_t idle_since;
    int   pt_obsvd;

    if (queue->jobs)
	schd_free_jobs(queue->jobs);

    if (queue->useracl)
	schd_free_useracl(queue->useracl);

    /* 
     * Rather than explicitly zeroing out all the fields in the queue, save
     * a reference to the queue name and host, which is all that is needed 
     * to identify the queue next time it is used.  Note that this sets the
     * jobs list to NULL, so it will not be accidentally traversed.
     *
     * Be sure to save and restore any other necessary information here!
     */

    qname      = queue->qname;
    exechost   = queue->exechost;
    idle_since = queue->idle_since;
    pt_obsvd   = queue->observe_pt;

    memset (queue, 0, sizeof (Queue));

    queue->qname      = qname;
    queue->exechost   = exechost;
    queue->idle_since = idle_since;
    queue->observe_pt = pt_obsvd;

    return (0);
}

/*
**	Remove a Resources list.
**	After doing this, rlist will point to garbage.
*/

int 
cleanup_rsrcs(Resources *rlist)
{
    Resources *rptr, *next;
    int    num = 0;

    for (rptr = rlist; rptr != NULL; rptr = next) {
	next = rptr->next;

	if (rptr->exechost)
	    (void)free(rptr->exechost);

	if (rptr->arch)
	    (void)free(rptr->arch);

	(void)memset (rptr, 0, sizeof (Resources));
	(void)free(rptr);

	num ++;
    }

    return (num);
}