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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mpitest.h"
#ifdef MTEST_LARGE_PORT_NAME
#define PORT_SIZE 4096
#define INIT_PORT_INFO(info) \
do { \
MPI_Info_create(&(info)); \
MPI_Info_set(info, "port_name_size", "4096"); \
} while (0)
#define FREE_PORT_INFO(info) MPI_Info_free(&(info))
#else
#define PORT_SIZE MPI_MAX_PORT_NAME
#define INIT_PORT_INFO(info) do {info = MPI_INFO_NULL;} while (0)
#define FREE_PORT_INFO(info) do { } while (0)
#endif /* MTEST_LARGE_PORT_NAME */
void check_error(int, const char *);
void check_error(int error, const char *fcname)
{
char err_string[MPI_MAX_ERROR_STRING] = "";
int length;
if (error != MPI_SUCCESS) {
MPI_Error_string(error, err_string, &length);
printf("%s failed: %s\n", fcname, err_string);
fflush(stdout);
MPI_Abort(MPI_COMM_WORLD, error);
}
}
int main(int argc, char *argv[])
{
int error;
int rank, size;
char port[PORT_SIZE];
MPI_Info port_info;
MPI_Status status;
MPI_Comm comm;
int verbose = 0;
if (getenv("MPITEST_VERBOSE")) {
verbose = 1;
}
if (verbose) {
printf("init.\n");
fflush(stdout);
}
MTest_Init(&argc, &argv);
/* To improve reporting of problems about operations, we
* change the error handler to errors return */
MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
MPI_Comm_set_errhandler(MPI_COMM_SELF, MPI_ERRORS_RETURN);
if (verbose) {
printf("size.\n");
fflush(stdout);
}
error = MPI_Comm_size(MPI_COMM_WORLD, &size);
check_error(error, "MPI_Comm_size");
if (verbose) {
printf("rank.\n");
fflush(stdout);
}
error = MPI_Comm_rank(MPI_COMM_WORLD, &rank);
check_error(error, "MPI_Comm_rank");
if (size < 2) {
printf("Two processes needed.\n");
MPI_Finalize();
return 1;
}
if (rank == 0) {
if (verbose) {
printf("open_port.\n");
fflush(stdout);
}
INIT_PORT_INFO(port_info);
error = MPI_Open_port(port_info, port);
check_error(error, "MPI_Open_port");
FREE_PORT_INFO(port_info);
if (verbose) {
printf("0: opened port: <%s>\n", port);
fflush(stdout);
}
if (verbose) {
printf("send.\n");
fflush(stdout);
}
error = MPI_Send(port, PORT_SIZE, MPI_CHAR, 1, 0, MPI_COMM_WORLD);
check_error(error, "MPI_Send");
if (verbose) {
printf("accept.\n");
fflush(stdout);
}
error = MPI_Comm_accept(port, MPI_INFO_NULL, 0, MPI_COMM_SELF, &comm);
check_error(error, "MPI_Comm_accept");
if (verbose) {
printf("close_port.\n");
fflush(stdout);
}
error = MPI_Close_port(port);
check_error(error, "MPI_Close_port");
if (verbose) {
printf("disconnect.\n");
fflush(stdout);
}
error = MPI_Comm_disconnect(&comm);
check_error(error, "MPI_Comm_disconnect");
} else if (rank == 1) {
if (verbose) {
printf("recv.\n");
fflush(stdout);
}
error = MPI_Recv(port, PORT_SIZE, MPI_CHAR, 0, 0, MPI_COMM_WORLD, &status);
check_error(error, "MPI_Recv");
if (verbose) {
printf("1: received port: <%s>\n", port);
fflush(stdout);
}
if (verbose) {
printf("connect.\n");
fflush(stdout);
}
error = MPI_Comm_connect(port, MPI_INFO_NULL, 0, MPI_COMM_SELF, &comm);
check_error(error, "MPI_Comm_connect");
MPI_Comm_set_errhandler(comm, MPI_ERRORS_RETURN);
if (verbose) {
printf("disconnect.\n");
fflush(stdout);
}
error = MPI_Comm_disconnect(&comm);
check_error(error, "MPI_Comm_disconnect");
}
error = MPI_Barrier(MPI_COMM_WORLD);
check_error(error, "MPI_Barrier");
MTest_Finalize(0);
return MTestReturnValue(0);
}
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