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static char rcsid[] =
"$Id: task_end.c,v 1.5 2009/01/23 01:12:57 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: task_end.c
*
* This program will tell a task0 instance to terminate.
* This is done by seeking the "known" service from a mailbox,
* initiating communication telling the task to terminate itself.
* The message mailbox provides the communication information
* to the specified task0 instance.
*
* usage: task_end [service_name] [index_nbr]
*
* files used: task_end.c taskf.c
*/
#include <stdio.h>
#ifdef HASSTDLIB
#include <stdlib.h>
#endif
#ifndef WIN32
#include <unistd.h> /* for gethostname */
#else
#include "pvmwin.h"
#endif
#include "pvm3.h"
main( argc, argv )
int argc;
char *argv[];
{
char *me = "task_end";
char machine[25]; /* local machine that task1 is running on */
int mytid; /* tid of task1 */
int my_context; /* context of task1 - itself */
int index; /* index of the service seeking */
char *service_name; /* name of the service seeking */
int their_context; /* context of the service's owner */
/* - comm on this context */
int msg_buf; /* buffer to store mailbox's message */
int their_tid; /* tid "offering" the desired service */
char server[25]; /* name of the machine "offering" service */
char msg_txt[100]; /* message to send to service */
/* display_incomming_parameters( me, argc, argv ); */
printf( "\n" );
if ( argc != 3 ) {
printf( "\nusage: task_end [service_name] [index_nbr]\n" );
exit( -1 );
}
index = atoi( argv[2] );
service_name = argv[1];
printf( "Looking for service name <%s> with index number [%d].\n",
service_name, index );
if ( (mytid = pvm_mytid()) == PvmSysErr ) {
printf( "\nPVM not up!\n" );
exit( -1 );
}
gethostname( machine, 25 );
printf( "%s: t%x on machine <%s> with context %d.\n",
me, mytid, machine, pvm_getcontext() );
/*
* look for the user specified service name/index pair
*/
msg_buf = pvm_recvinfo( service_name, index, PvmMboxDefault );
if ( msg_buf >= 0 ) {
pvm_setrbuf( msg_buf );
pvm_upkint( &their_tid, 1, 1 );
pvm_upkint( &their_context, 1, 1 );
pvm_upkstr( server );
printf( "service name <%s> of index %d on <%s> id: %x ",
service_name, index, server, their_tid );
printf( "with their context: %d\n", their_context );
}
else {
switch ( msg_buf )
{
case PvmNotFound:
printf( "\n%s: no service running\n", me );
break;
case PvmBadParam:
printf( "\n%s: Invalid argument to pvm_recvinfo().\n",
me );
break;
case PvmNoSuchBuf:
printf( "\n%s: Message buffer id does not exist.\n",
me );
break;
case PvmDenied:
printf(
"\n%s: Key locked by another task, can't delete.\n",
me );
break;
default:
lpvmerr( "\n%s: task_end.c: error %d", me, msg_buf );
break;
} /* end_switch */
exit( -1 );
}
/*
* send END message to the service with their context set
*/
/* activate the server's context */
my_context = pvm_setcontext( their_context );
printf( "%s: t%x on machine <%s> with context %d.\n",
me, mytid, machine, pvm_getcontext() );
sprintf( msg_txt, "END" );
pvm_initsend( PvmDataDefault );
pvm_pkstr( msg_txt );
pvm_send( their_tid, 1 );
/*
* reset back to my original context
*/
pvm_setcontext( my_context );
printf( "%s: t%x on machine <%s> with context %d.\n",
me, mytid, machine, pvm_getcontext() );
pvm_exit();
exit( 0 );
}
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