[Mpi-forum] Giving up on C11 _Generic

[Jim Dinan]

Even simpler than this, we could just forward all calls to the MPI_Count
interface (see below).  The int count argument should type convert to
MPI_Count without issue.  Note that it still needs to be a function-like
macro so that function pointers work.

Don't give up yet!  :D

 ~Jim.

#include <stdio.h>



typedef int MPI_Datatype;

typedef int MPI_Comm;


int MPI_Send(const void* buf, int count, MPI_Datatype datatype, int dest,

             int tag, MPI_Comm comm)

{

    printf("MPI_Send(count = %d)\n", count);

    return 0;

}


int MPI_Send_x(const void* buf, long long count, MPI_Datatype datatype, int
dest,

               int tag, MPI_Comm comm)

{

    printf("MPI_Send_x(count = %lld)\n", count);

    return 0;

}


#define MPI_Send(buf, count, datatype, dest, tag, comm) MPI_Send_x(buf,
count, datatype, dest, tag, comm)


int main(int argc, char *argv[]) {

    /* 8589934592LL == 2^33 */

    long long i = 8589934592LL + 11;

    int ret;

    int (*snd_ptr)(const void*, int, MPI_Datatype, int, int, MPI_Comm) =
&MPI_Send;

    ret = MPI_Send(NULL, i, 0, 0, 0, 0);

    ret = MPI_Send(NULL, 5, 0, 0, 0, 0);

    ret = (*snd_ptr)(NULL, i, 0, 0, 0, 0);

    ret = (*snd_ptr)(NULL, 5, 0, 0, 0, 0);

    return 0;

}


MPI_Send_x(count = 8589934603)

MPI_Send_x(count = 5)

MPI_Send(count = 11)

MPI_Send(count = 5)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mpi-forum.org/pipermail/mpi-forum/attachments/20190807/fb8b236e/attachment-0001.html>