56 строки
1.3 KiB
C
56 строки
1.3 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "mpi.h"
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#define MAX_DATA 100
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int main( int argc, char **argv )
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{
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MPI_Comm client;
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MPI_Status status;
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char port_name[MPI_MAX_PORT_NAME];
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double buf[MAX_DATA];
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int size, again;
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MPI_Init( &argc, &argv );
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MPI_Comm_size(MPI_COMM_WORLD, &size);
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if (size != 1) {
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fprintf(stderr, "Server too big - need only 1 rank\n");
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exit(1);
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}
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MPI_Open_port(MPI_INFO_NULL, port_name);
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printf("server available at %s\n",port_name);
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while (1)
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{
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MPI_Comm_accept( port_name, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &client );
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again = 1;
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while (again)
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{
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fprintf(stderr, "Server loop %d\n", again);
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MPI_Recv( buf, MAX_DATA, MPI_DOUBLE, MPI_ANY_SOURCE,
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MPI_ANY_TAG, client, &status );
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switch (status.MPI_TAG)
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{
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case 0:
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fprintf(stderr, "Server recvd terminate cmd\n");
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MPI_Comm_disconnect( &client );
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MPI_Close_port(port_name);
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MPI_Finalize();
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return 0;
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case 2: /* do something */
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fprintf( stderr, "Do something ...\n" );
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break;
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default:
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/* Unexpected message type */
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MPI_Abort( MPI_COMM_WORLD, 1 );
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}
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++again;
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}
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}
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}
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