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static char rcsid[] =
"$Id: lmsg.c,v 1.3 1997/06/25 22:08:50 pvmsrc 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.
*/
/*
* lmsg.c
*
* low level message functions.
*
*/
#include <pvm3.h>
#include "pvmalloc.h"
#include "listmac.h"
#include "pvmdabuf.h"
#include "pvmmagic.h"
#include "lmsg.h"
extern void pvmbailout();
/***************
** Private **
** **
***************/
#ifdef IMA_CSPP
/* NOTE: If we were doing flushes on node, we'd have to set dcache_stride
to 32 for single node systems and 64 for multinode systems.
But since we only do this for cross node systems, we already know
it needs to be 64
*/
int dcache_stride = 64;
#endif
#ifdef CLUMP_ALLOC
#ifndef MSGID_CLUMP
#define MSGID_CLUMP 50
#endif
static struct msgid freemsgids; /* free msgid header cache */
static int nummsgids = 0;
#endif
static struct msgid *
msgid_get_header()
{
struct msgid *mp;
int n;
#ifdef CLUMP_ALLOC
if (nummsgids == 0) {
freemsgids.ms_link = freemsgids.ms_rlink = &freemsgids;
if (!(mp = TALLOC(MSGID_CLUMP, struct msgid, "mids")))
return (struct msgid *)0;
for (n = MSGID_CLUMP; n-- > 0; ) {
LISTPUTBEFORE(&freemsgids, mp, ms_link, ms_rlink);
mp++;
}
nummsgids = MSGID_CLUMP;
}
nummsgids--;
mp = freemsgids.ms_link;
LISTDELETE(mp, ms_link, ms_rlink);
#else
mp = TALLOC(1, struct msgid, "mid");
#endif
mp->magic = LMSG_MSGID; /* set the magic number */
return mp;
}
static
msgid_put_header(mp)
struct msgid *mp;
{
if (BADMAGIC(LMSG_MSGID, mp->magic))
{
pvmlogerror("msgid_put_header(): bad magic number \n");
pvmbailout(0);
return PvmSysErr;
}
#ifdef CLUMP_ALLOC
if (nummsgids == 0)
freemsgids.ms_link = freemsgids.ms_rlink = &freemsgids;
LISTPUTBEFORE(&freemsgids, mp, ms_link, ms_rlink);
nummsgids++;
#else
PVM_FREE(mp);
#endif
return 0;
}
/**********************
** Lmsg Functions **
** **
**********************/
/* msgid_new()
*
* Create a new message id
*/
struct msgid *
msgid_new()
{
struct msgid *mp;
if (!(mp = msgid_get_header()))
goto oops;
mp->id = -1;
mp->otid = -1;
mp->ctxt = -1;
mp->complete = 0;
mp->ubuf = (char *) 0;
return mp;
oops:
pvmlogerror("msgid_new() can't get memory\n");
pvmbailout(0);
return (struct msgid *) 0;
}
/* msgid_free()
*
* free the msgid structure
*/
void
msgid_free(mp)
struct msgid *mp;
{
if (mp)
msgid_put_header(mp);
}
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