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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include "mpitest.h"
/*
static char MTEST_Descrip[] = "Simple test of generalized requests";
*/
int query_fn(void *extra_state, MPI_Status * status);
int query_fn(void *extra_state, MPI_Status * status)
{
/* Set a default status */
status->MPI_SOURCE = MPI_UNDEFINED;
status->MPI_TAG = MPI_UNDEFINED;
MPI_Status_set_cancelled(status, 0);
MPI_Status_set_elements(status, MPI_BYTE, 0);
return 0;
}
int free_fn(void *extra_state);
int free_fn(void *extra_state)
{
int *b = (int *) extra_state;
if (b)
*b = *b - 1;
/* The value returned by the free function is the error code
* returned by the wait/test function */
return 0;
}
int cancel_fn(void *extra_state, int complete);
int cancel_fn(void *extra_state, int complete)
{
return 0;
}
/*
* This is a very simple test of generalized requests. Normally, the
* MPI_Grequest_complete function would be called from another routine,
* often running in a separate thread. This simple code allows us to
* check that requests can be created, tested, and waited on in the
* case where the request is complete before the wait is called.
*
* Note that MPI did *not* define a routine that can be called within
* test or wait to advance the state of a generalized request.
* Most uses of generalized requests will need to use a separate thread.
*/
int main(int argc, char *argv[])
{
int errs = 0;
int counter, flag;
MPI_Status status;
MPI_Request request;
MTest_Init(&argc, &argv);
MPI_Grequest_start(query_fn, free_fn, cancel_fn, NULL, &request);
MPI_Test(&request, &flag, &status);
if (flag) {
errs++;
fprintf(stderr, "Generalized request marked as complete\n");
}
MPI_Grequest_complete(request);
MPI_Wait(&request, &status);
counter = 1;
MPI_Grequest_start(query_fn, free_fn, cancel_fn, &counter, &request);
MPI_Grequest_complete(request);
MPI_Wait(&request, MPI_STATUS_IGNORE);
if (counter) {
errs++;
fprintf(stderr, "Free routine not called, or not called with extra_data");
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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