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static char rcsid[] =
"$Id: inherit3.c,v 1.3 1997/07/09 13:24:50 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.
*/
/*
* Filename: inherit3.c
*
* support program for inherita.c - read docs in that file
*/
#ifndef WIN32
#include <unistd.h> /* for gethostname */
#else
#include "pvmwin.h"
#endif
#include "pvm3.h"
main()
{
char *me = "inherit3";
int cc, tid, ptid;
char buf[100], buf2[100];
char machine[25];
int mycontext, context_1;
ptid = pvm_parent();
gethostname( machine, 25 );
sprintf( buf, "%s t%x on machine <%s> with context %d.",
me, pvm_mytid(), machine, pvm_getcontext() );
/* Send message to parent */
pvm_initsend( PvmDataDefault );
pvm_pkstr( buf );
pvm_send( ptid, 1 );
context_1 = pvm_newcontext(); /* create new context */
mycontext = pvm_setcontext( context_1 ); /* activate new context */
sprintf( buf, "%s t%x on machine <%s> with context %d.",
me, pvm_mytid(), machine, pvm_getcontext() );
pvm_setcontext( mycontext );
/* Send message to parent */
pvm_initsend( PvmDataDefault );
pvm_pkstr( buf );
pvm_send( ptid, 1 );
pvm_setcontext( context_1 );
/*
* Spawn a child process to confirm that it will inherit the
* parent context.
*/
cc = pvm_spawn( "inherit2", (char **) 0, PvmTaskDefault, "", 1,
&tid );
if ( cc != 1 ) {
printf( "%s: can't start inherit2\n", me );
pvm_exit();
exit( 0 );
}
sprintf( buf,
"%s: I just spawned inherit2 as tid t%x with context %d.\n",
me, tid, pvm_getcontext() );
pvm_setcontext( mycontext );
/* Send message to parent */
pvm_initsend( PvmDataDefault );
pvm_pkstr( buf );
pvm_send( ptid, 1 );
pvm_setcontext( context_1 );
/*
* wait to receive message from child
*/
cc = pvm_recv( -1, -1 );
pvm_bufinfo( cc, (int *) 0, (int *) 0, &tid );
pvm_upkstr( buf2 );
sprintf( buf, "%s: t%x %s\n", me, tid, buf2 );
pvm_setcontext( mycontext );
/* Send message to parent */
pvm_initsend( PvmDataDefault );
pvm_pkstr( buf );
pvm_send( ptid, 1 );
sprintf( buf, "%s t%x on machine <%s> with context %d.",
me, pvm_mytid(), machine, pvm_getcontext() );
/* Send message to parent */
pvm_initsend( PvmDataDefault );
pvm_pkstr( buf );
pvm_send( ptid, 1 );
sprintf( buf,
"END - sent from %s t%x on machine <%s> with context %d.",
me, pvm_mytid(), machine, pvm_getcontext() );
/* Send message to parent */
pvm_initsend( PvmDataDefault );
pvm_pkstr( buf );
pvm_send( ptid, 1 );
pvm_exit();
exit( 0 );
}
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