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static char rcsid[] =
"$Id: pkt.c,v 1.4 1999/07/08 19:00:05 kohl Exp $";
/*
* PVM version 3.4: Parallel Virtual Machine System
* University of Tennessee, Knoxville TN.
* Oak Ridge National Laboratory, Oak Ridge TN.
* Emory University, Atlanta GA.
* Authors: J. J. Dongarra, G. E. Fagg, M. Fischer
* G. A. Geist, J. A. Kohl, R. J. Manchek, P. Mucci,
* P. M. Papadopoulos, S. L. Scott, and V. S. Sunderam
* (C) 1997 All Rights Reserved
*
* NOTICE
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted
* provided that the above copyright notice appear in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation.
*
* Neither the Institutions (Emory University, Oak Ridge National
* Laboratory, and University of Tennessee) nor the Authors make any
* representations about the suitability of this software for any
* purpose. This software is provided ``as is'' without express or
* implied warranty.
*
* PVM version 3 was funded in part by the U.S. Department of Energy,
* the National Science Foundation and the State of Tennessee.
*/
/*
* pkt.c
*
* Packet buffers.
*
* $Log: pkt.c,v $
* Revision 1.4 1999/07/08 19:00:05 kohl
* Fixed "Log" keyword placement.
* - indent with " * " for new CVS.
*
* Revision 1.3 1997/06/27 17:32:32 pvmsrc
* Updated for WIN32 header files & Authors.
*
* Revision 1.2 1997/01/28 19:26:56 pvmsrc
* New Copyright Notice & Authors.
*
* Revision 1.1 1996/09/23 23:44:23 pvmsrc
* Initial revision
*
* Revision 1.3 1995/07/24 18:27:24 manchek
* zero pk_cpos on create
*
* Revision 1.2 1994/06/03 20:38:20 manchek
* version 3.3.0
*
* Revision 1.1 1993/08/30 23:26:49 manchek
* Initial revision
*
*/
#include <stdio.h>
#ifndef WIN32
#include <sys/time.h>
#else
#include "pvmwin.h"
#endif
#include <pvm3.h>
#include "pvmalloc.h"
#include "pkt.h"
#include "pvmdabuf.h"
#include "listmac.h"
#include "bfunc.h"
extern void pvmbailout();
/***************
** Private **
** **
***************/
/*********************
** Pkt Functions **
** **
*********************/
/* pk_new()
*
* Create a new pkt, not in a list.
* If len is nonzero, len bytes are allocated as data space.
* Else, the pkt has no data (is a master or will get data later).
*
* The following fields are uninitialized:
* pk_src, pk_dst, pk_flag, pk_tag, pk_ctx, pk_enc, pk_wid, pk_crc, pk_hostd,
* pk_seq, pk_ack, pk_rtv, pk_rta, pk_rto, pk_at, pk_nrt
*/
struct pkt *
pk_new(len)
int len; /* (max) buffer size or 0 */
{
struct pkt *pp;
if (!(pp = TALLOC(1, struct pkt, "pkt")))
goto oops;
/*
BZERO((char*)pp, sizeof(struct pkt));
*/
if (len) { /* slave pkt */
if (!(pp->pk_dat = pp->pk_buf = da_new(len))) {
PVM_FREE(pp);
goto oops;
}
pp->pk_max = len;
pp->pk_len = 0;
pp->pk_link = pp->pk_rlink = 0;
} else { /* master */
pp->pk_dat = pp->pk_buf = 0;
pp->pk_link = pp->pk_rlink = pp;
}
pp->pk_cpos = 0;
pp->pk_tlink = pp->pk_trlink = 0;
return pp;
oops:
pvmlogerror("pk_new() can't get memory\n");
pvmbailout(0);
return (struct pkt*)0;
}
void
pk_free(pp)
struct pkt *pp;
{
struct pkt *pp2, *pp3;
if (pp->pk_buf) { /* slave pkt */
if (pp->pk_tlink) {
LISTDELETE(pp, pk_tlink, pk_trlink);
}
da_unref(pp->pk_buf);
} else { /* master pkt */
/* free all pkts in chain */
for (pp2 = pp->pk_link; pp2 != pp; pp2 = pp3) {
pp3 = pp2->pk_link;
LISTDELETE(pp2, pk_link, pk_rlink);
pk_free(pp2);
}
}
PVM_FREE(pp);
}
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