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/*
* SCCS: @(#)xtab.c 1.8 (97/06/02)
*
* UniSoft Ltd., London, England
*
* (C) Copyright 1992 X/Open Company Limited
*
* All rights reserved. No part of this source code may be reproduced,
* stored in a retrieval system, or transmitted, in any form or by any
* means, electronic, mechanical, photocopying, recording or otherwise,
* except as stated in the end-user licence agreement, without the prior
* permission of the copyright owners.
*
* X/Open and the 'X' symbol are trademarks of X/Open Company Limited in
* the UK and other countries.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifndef lint
static char sccsid[] = "@(#)xtab.c 1.8 (97/06/02) TET3 release 3.3";
#endif
/************************************************************************
SCCS: @(#)xtab.c 1.8 97/06/02 TETware release 3.3
NAME: xtab.c
PRODUCT: TETware
AUTHOR: Andrew Dingwall, UniSoft Ltd.
DATE CREATED: April 1992
DESCRIPTION:
execution results table administration functions
MODIFICATIONS:
Andrew Dingwall, UniSoft Ltd., September 1996
changes to enable TCC to own an xres id (instead of MTCM)
Andrew Dingwall, UniSoft Ltd., June 1997
prevent XRID wrapping around through zero
************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <time.h>
#include <sys/types.h>
#include "dtmac.h"
#include "dtmsg.h"
#include "ptab.h"
#include "xtab.h"
#include "valmsg.h"
#include "error.h"
#include "ltoa.h"
#include "llist.h"
#include "bstring.h"
#include "dtetlib.h"
#include "xresd.h"
#ifdef NEEDsrcFile
static char srcFile[] = __FILE__; /* file name for error reporting */
#endif
static struct xtab *xtab; /* ptr to head of xres table */
/*
** xtalloc() - allocate an xres table element and return a pointer thereto
**
** return (struct xtab *) 0 on error
*/
struct xtab *xtalloc()
{
register struct xtab *xp;
static long xrid;
/* allocate a new XRES ID */
if (++xrid < 0L) {
error(0, "too many XRES IDs", (char *) 0);
return((struct xtab *) 0);
}
/* allocate memory for the xtab element and fill it in */
errno = 0;
if ((xp = (struct xtab *) malloc(sizeof *xp)) == (struct xtab *) 0) {
error(errno, "can't allocate xtab element", (char *) 0);
return((struct xtab *) 0);
}
TRACE2(tet_Tbuf, 6, "allocate xtab = %s", tet_i2x(xp));
bzero((char *) xp, sizeof *xp);
xp->xt_xrid = xrid;
return(xp);
}
/*
** xtfree() - close files and free an xres table element
*/
void xtfree(xp)
struct xtab *xp;
{
TRACE2(tet_Tbuf, 6, "free xtab = %s", tet_i2x(xp));
if (xp) {
if (xp->xt_xfp)
(void) fclose(xp->xt_xfp);
if (xp->xt_xfname) {
TRACE2(tet_Tbuf, 6, "free xtab xfname = %s",
tet_i2x(xp->xt_xfname));
free(xp->xt_xfname);
}
if (xp->xt_ud) {
TRACE2(tet_Tbuf, 6, "free uxtab = %s",
tet_i2x(xp->xt_ud));
free((char *) xp->xt_ud);
}
free((char *) xp);
}
}
/*
** uxtalloc() - allocate an xtab per-user details element or grow an
** existing one
**
** return 0 if successful or -1 on error
*/
int uxtalloc(xp, nud)
struct xtab *xp;
int nud;
{
register int needlen;
ASSERT(xp);
needlen = nud * sizeof *xp->xt_ud;
if (BUFCHK((char **) &xp->xt_ud, &xp->xt_udlen, needlen) < 0) {
if (xp->xt_udlen == 0)
xp->xt_nud = 0;
return(-1);
}
bzero((char *) xp->xt_ud, needlen);
xp->xt_nud = nud;
return(0);
}
/*
** xtadd() - insert an element in the xtab list
*/
void xtadd(xp)
struct xtab *xp;
{
tet_listinsert((struct llist **) &xtab, (struct llist *) xp);
}
/*
** xtrm() - remove an element from the xtab list
*/
void xtrm(xp)
struct xtab *xp;
{
if (xp->xt_flags & XF_TPINPROGRESS)
(void) tpend(xp);
if (xp->xt_flags & XF_ICINPROGRESS)
(void) icend(xp);
tet_listremove((struct llist **) &xtab, (struct llist *) xp);
}
/*
** xtfind() - find an xtab element matching xrid and return a pointer
** thereto
**
** return (struct xtab *) 0 if none can be found
*/
struct xtab *xtfind(xrid)
register long xrid;
{
register struct xtab *xp;
for (xp = xtab; xp; xp = xp->xt_next)
if (xp->xt_xrid == xrid)
break;
return(xp);
}
/*
** xtdead() - xtab processing when a connection closes
*/
void xtdead(pp)
register struct ptab *pp;
{
register struct xtab *xp;
register struct uxtab *up;
register int count, done;
/* find related xres table entries and update them
remove an entry that is no longer required */
do {
done = 1;
for (xp = xtab; xp; xp = xp->xt_next) {
count = 0;
if (xp->xt_ptab == pp)
xp->xt_ptab = (struct ptab *) 0;
for (up = xp->xt_ud; up < xp->xt_ud + xp->xt_nud; up++)
if (up->ux_ptab == pp) {
up->ux_state = XS_DEAD;
up->ux_ptab = (struct ptab *) 0;
count++;
}
else if (up->ux_state == XS_DEAD)
count++;
if (count == xp->xt_nud) {
if (xp->xt_flags & XF_TPINPROGRESS)
(void) tpend(xp);
if (xp->xt_flags & XF_ICINPROGRESS)
(void) icend(xp);
if (!xp->xt_ptab) {
xtrm(xp);
xtfree(xp);
done = 0;
break;
}
}
}
} while (!done);
}
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