1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
4 * (C) 2003 by Argonne National Laboratory.
5 * See COPYRIGHT in top-level directory.
14 static char MTEST_Descrip[] = "Test MPI_Probe() for an intercomm";
16 #define MAX_DATA_LEN 100
18 int main( int argc, char *argv[] )
20 int errs = 0, recvlen, isLeft;
24 char buf[MAX_DATA_LEN];
25 const char *test_str = "test";
27 MTest_Init( &argc, &argv );
29 MPI_Comm_rank( MPI_COMM_WORLD, &rank );
30 MPI_Comm_size( MPI_COMM_WORLD, &size );
33 fprintf( stderr, "This test requires at least two processes." );
34 MPI_Abort( MPI_COMM_WORLD, 1 );
37 while (MTestGetIntercomm( &intercomm, &isLeft, 2 )) {
38 if (intercomm == MPI_COMM_NULL) continue;
40 MPI_Comm_rank(intercomm, &rank);
42 /* 0 ranks on each side communicate, everyone else does nothing */
46 MPI_Probe(0, 0, intercomm, &status);
47 MPI_Get_count(&status, MPI_CHAR, &recvlen);
48 if (recvlen != (strlen(test_str) + 1)) {
49 printf(" Error: recvlen (%d) != strlen(\"%s\")+1 (%d)\n", recvlen, test_str, (int)strlen(test_str) + 1);
53 MPI_Recv(buf, recvlen, MPI_CHAR, 0, 0, intercomm, &status);
54 if (strcmp(test_str,buf)) {
55 printf(" Error: strcmp(test_str,buf)!=0\n");
60 strncpy(buf, test_str, 5);
61 MPI_Send(buf, strlen(buf)+1, MPI_CHAR, 0, 0, intercomm);
64 MTestFreeComm(&intercomm);
67 MTest_Finalize( errs );