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static char rcsid[] =
"$Id: inheritb.c,v 1.3 1997/07/09 13:24:52 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.
*/
/*
* Filename: inheritb.c
*
* This example shows how a generic receive any message from any task
* may "select" the message to receive based on the context.
*
* inheritb starts two children (2 x inherit2), each under their own
* context so that the parent (inheritb) may receive communication
* based on the child's context.
*
* files used: inheritb.c inherit2.c
*
* usage: inheritb
*
*/
#include <stdio.h>
#ifndef WIN32
#include <unistd.h> /* for gethostname */
#else
#include "pvmwin.h"
#endif
#include "pvm3.h"
main()
{
char *me = "inheritb";
int context_original, context_1, context_2;
int ptid, tid, gptid, cc;
char buf[100];
char machine[25];
int i=0;
gethostname( machine, 25 );
printf( "%d:%s: t%x on machine <%s> with context %d.\n",
i++, me, pvm_mytid(), machine, pvm_getcontext() );
context_original = pvm_getcontext(); /* retrieve initial context */
context_1 = pvm_newcontext(); /* get new context 1 */
pvm_setcontext( context_1 ); /* activate new context 1 */
printf( "%d:%s: t%x on machine <%s> with new #1 context %d ",
i++, me, pvm_mytid(), machine, pvm_getcontext() );
printf( "--> spawn 1st inherit2.\n" );
/* start 1st inherit2 worker @ context 1 */
pvm_spawn( "inherit2", (char **) 0, PvmTaskDefault, "", 1, &tid );
context_2 = pvm_newcontext(); /* get new context 2 */
pvm_setcontext(context_2); /* activate new context 2 */
printf( "%d:%s: t%x on machine <%s> with new #2 context %d ",
i++, me, pvm_mytid(), machine, pvm_getcontext() );
printf( "--> spawn 2nd inherit2.\n" );
/* start 2nd inherit2 worker @ context 2 */
pvm_spawn( "inherit2", (char **) 0, PvmTaskDefault, "", 1, &tid );
/* receive from inherit2 worker 2 @ context 2 */
cc = pvm_recv( -1, -1 );
pvm_bufinfo( cc, (int *) 0, (int *) 0, &tid );
pvm_upkstr( buf );
printf( "%d:%s: t%x %s <-- received from 2nd inherit2.\n",
i++, me, tid, buf);
/* reactivate initial context 1*/
pvm_setcontext(context_1);
printf( "%d:%s: t%x on machine <%s> with new #1 context %d.\n",
i++, me, pvm_mytid(), machine, pvm_getcontext() );
/* receive from inherit2 worker 1 @ context 1 */
cc = pvm_recv( -1, -1 );
pvm_bufinfo( cc, (int *) 0, (int *) 0, &tid );
pvm_upkstr( buf );
printf( "%d:%s: t%x %s <-- received from 1st inherit2.\n",
i++, me, tid, buf );
pvm_exit();
exit( 0 );
}
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