#define BAD_ANSWER 100000
-int assoc ( int *, int *, int *, MPI_Datatype * );
+int assoc(int *, int *, int *, MPI_Datatype *);
/*
- The operation is inoutvec[i] = invec[i] op inoutvec[i]
+ The operation is inoutvec[i] = invec[i] op inoutvec[i]
(see 4.9.4). The order is important.
Note that the computation is in process rank (in the communicator)
order, independant of the root.
*/
-int assoc(int *invec, int *inoutvec, int *len, MPI_Datatype *dtype)
+int assoc(int *invec, int *inoutvec, int *len, MPI_Datatype * dtype)
{
- int i;
- for ( i=0; i<*len; i++ ) {
- if (inoutvec[i] <= invec[i] ) {
- int rank;
- MPI_Comm_rank( MPI_COMM_WORLD, &rank );
- fprintf( stderr, "[%d] inout[0] = %d, in[0] = %d\n",
- rank, inoutvec[0], invec[0] );
- inoutvec[i] = BAD_ANSWER;
- }
- else
- inoutvec[i] = invec[i];
- }
- return (1);
+ int i;
+ for (i = 0; i < *len; i++) {
+ if (inoutvec[i] <= invec[i]) {
+ int rank;
+ MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+ fprintf(stderr, "[%d] inout[0] = %d, in[0] = %d\n", rank, inoutvec[0], invec[0]);
+ inoutvec[i] = BAD_ANSWER;
+ }
+ else
+ inoutvec[i] = invec[i];
+ }
+ return (1);
}
-int main( int argc, char **argv )
+int main(int argc, char **argv)
{
- int rank, size;
- int data;
- int errors=0;
- int result = -100;
- MPI_Op op;
+ int rank, size;
+ int data;
+ int errors = 0;
+ int result = -100;
+ MPI_Op op;
- MTest_Init( &argc, &argv );
- MPI_Comm_rank( MPI_COMM_WORLD, &rank );
- MPI_Comm_size( MPI_COMM_WORLD, &size );
+ MTest_Init(&argc, &argv);
+ MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+ MPI_Comm_size(MPI_COMM_WORLD, &size);
data = rank;
- MPI_Op_create( (MPI_User_function*)assoc, 0, &op );
- MPI_Reduce ( &data, &result, 1, MPI_INT, op, size-1, MPI_COMM_WORLD );
- MPI_Bcast ( &result, 1, MPI_INT, size-1, MPI_COMM_WORLD );
- MPI_Op_free( &op );
- if (result == BAD_ANSWER) errors++;
+ MPI_Op_create((MPI_User_function *) assoc, 0, &op);
+ MPI_Reduce(&data, &result, 1, MPI_INT, op, size - 1, MPI_COMM_WORLD);
+ MPI_Bcast(&result, 1, MPI_INT, size - 1, MPI_COMM_WORLD);
+ MPI_Op_free(&op);
+ if (result == BAD_ANSWER)
+ errors++;
- MTest_Finalize( errors );
+ MTest_Finalize(errors);
MPI_Finalize();
- return MTestReturnValue( errors );
+ return MTestReturnValue(errors);
}