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#include <cctk.h>
#ifndef CCTK_MPI
#include <assert.h>
#include <stdlib.h>
#include <string.h>
// IRIX wants this before <time.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# elif HAVE_TIME_H
# include <time.h>
# endif
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "nompi.h"
int MPI_Abort (MPI_Comm const comm, int const errorcode)
{
exit(errorcode);
}
int
MPI_Allgather (void* const sendbuf, int const sendcnt,
MPI_Datatype const sendtype,
void* const recvbuf, int const recvcnt,
MPI_Datatype const recvtype,
MPI_Comm const comm)
{
assert (sendbuf);
assert (sendcnt >= 0);
assert (recvbuf);
assert (recvcnt >= 0);
assert (recvcnt == sendcnt);
assert (recvtype == sendtype);
MPI_Aint const recvsize = recvtype;
assert (recvsize > 0);
memcpy (recvbuf, sendbuf, recvcnt * recvsize);
return 0;
}
int
MPI_Allgatherv (void* const sendbuf, int const sendcnt,
MPI_Datatype const sendtype,
void* const recvbuf, int* const recvcnts, int* const recvoffs,
MPI_Datatype const recvtype,
MPI_Comm const comm)
{
assert (sendbuf);
assert (sendcnt >= 0);
assert (recvbuf);
assert (recvcnts);
assert (recvcnts[0] == sendcnt);
assert (recvoffs[0] == 0);
assert (recvtype == sendtype);
MPI_Aint const recvsize = recvtype;
assert (recvsize > 0);
memcpy (recvbuf, sendbuf, recvcnts[0] * recvsize);
return 0;
}
int
MPI_Allreduce (void* const sendbuf, void* const recvbuf, int const cnt,
MPI_Datatype const datatype, MPI_Op const op,
MPI_Comm const comm)
{
assert (sendbuf);
assert (recvbuf);
assert (cnt >= 0);
MPI_Aint const recvsize = datatype;
assert (recvsize > 0);
memcpy (recvbuf, sendbuf, cnt * recvsize);
return 0;
}
int
MPI_Alltoall (void* const sendbuf, int const sendcnt,
MPI_Datatype const sendtype,
void* const recvbuf, int const recvcnt,
MPI_Datatype const recvtype,
MPI_Comm const comm)
{
assert (sendbuf);
assert (sendcnt >= 0);
assert (recvbuf);
assert (recvcnt >= 0);
assert (recvcnt == sendcnt);
assert (recvtype == sendtype);
MPI_Aint const recvsize = recvtype;
assert (recvsize > 0);
memcpy (recvbuf, sendbuf, recvcnt * recvsize);
return 0;
}
int
MPI_Alltoallv (void* const sendbuf, int* const sendcnts, int* const sendoffs,
MPI_Datatype const sendtype,
void* const recvbuf, int* const recvcnts, int* const recvoffs,
MPI_Datatype const recvtype,
MPI_Comm const comm)
{
assert (sendbuf);
assert (sendcnts);
assert (sendoffs);
assert (sendoffs[0] == 0);
assert (recvbuf);
assert (recvcnts);
assert (recvcnts[0] == sendcnts[0]);
assert (recvoffs);
assert (recvoffs[0] == 0);
assert (recvtype == sendtype);
MPI_Aint const recvsize = recvtype;
assert (recvsize > 0);
memcpy (recvbuf, sendbuf, recvcnts[0] * recvsize);
return 0;
}
int
MPI_Barrier (MPI_Comm const comm)
{
return 0;
}
int
MPI_Bcast (void* const buf, int const cnt,
MPI_Datatype const datatype,
int const root, MPI_Comm const comm)
{
assert (buf);
assert (cnt >= 0);
assert (root == 0);
return 0;
}
int
MPI_Comm_rank (MPI_Comm const comm, int* const rank)
{
assert (rank);
*rank = 0;
return 0;
}
int
MPI_Comm_size (MPI_Comm const comm, int* const size)
{
assert (size);
*size = 1;
return 0;
}
int
MPI_Comm_split (MPI_Comm const comm, int const color, int const key,
MPI_Comm *const newcomm)
{
assert (newcomm);
return 0;
}
int
MPI_Dims_create (int const nnodes, int const ndims, int* const dims)
{
assert (dims);
int npoints = 1;
for (int d=0; d<ndims; ++d) {
assert (dims[d] >= 0);
if (dims[d] > 0) npoints *= dims[d];
}
assert (npoints % nnodes == 0);
assert (nnodes == 1); /* Assume there is one node per MPI process */
for (int d=0; d<ndims; ++d) {
if (dims[d] == 0) dims[d] = 1;
}
return 0;
}
int
MPI_Finalize (void)
{
return 0;
}
int
MPI_Gather (void* const sendbuf, int const sendcnt,
MPI_Datatype const sendtype,
void* const recvbuf, int const recvcnt,
MPI_Datatype const recvtype,
int const root, MPI_Comm const comm)
{
assert (sendbuf);
assert (sendcnt >= 0);
assert (recvbuf);
assert (recvcnt >= 0);
assert (recvtype == sendtype);
assert (root == 0);
MPI_Aint const recvsize = recvtype;
assert (recvsize > 0);
memcpy (recvbuf, sendbuf, recvcnt * recvsize);
return 0;
}
int
MPI_Gatherv (void* const sendbuf, int const sendcnt,
MPI_Datatype const sendtype,
void* const recvbuf, int* const recvcnts, int* const recvoffs,
MPI_Datatype const recvtype,
int const root, MPI_Comm const comm)
{
assert (sendbuf);
assert (sendcnt >= 0);
assert (recvbuf);
assert (recvcnts);
assert (recvcnts[0] >= 0);
assert (recvcnts[0] == sendcnt);
assert (recvoffs);
assert (recvoffs[0] == 0);
assert (recvtype == sendtype);
assert (root == 0);
MPI_Aint const recvsize = recvtype;
assert (recvsize > 0);
memcpy (recvbuf, sendbuf, recvcnts[0] * recvsize);
return 0;
}
int
MPI_Init (int* const argc, char*** const argv)
{
return 0;
}
int
MPI_Irecv (void* const buf, int const cnt, MPI_Datatype const datatype,
int const source, int const tag, MPI_Comm const comm,
MPI_Request* const request)
{
/* this should not be called */
assert(0);
return -1;
}
int
MPI_Isend (void* const buf, int const count, MPI_Datatype const datatype,
int const dest, int const tag, MPI_Comm const comm,
MPI_Request* const request)
{
/* this should not be called */
assert(0);
return -1;
}
int
MPI_Pcontrol (int const level, ... )
{
/* do nothing */
return 0;
}
int
MPI_Reduce (void* const sendbuf, void* const recvbuf, int const cnt,
MPI_Datatype const datatype, MPI_Op const op, int const root,
MPI_Comm const comm)
{
assert (sendbuf);
assert (recvbuf);
assert (cnt >= 0);
assert (root == 0);
int const datasize = datatype;
assert (datasize > 0);
memcpy (recvbuf, sendbuf, cnt * datasize);
return 0;
}
int
MPI_Send (void* const buf, int const count, MPI_Datatype const datatype,
int const dest, int const tag, MPI_Comm const comm)
{
/* this should not be called */
assert(0);
return -1;
}
int
MPI_Ssend (void* const buf, int const count, MPI_Datatype const datatype,
int const dest, int const tag, MPI_Comm const comm)
{
/* this should not be called */
assert(0);
return -1;
}
int
MPI_Type_commit (MPI_Datatype* const datatype)
{
/* do nothing */
return 0;
}
int
MPI_Type_contiguous (int const cnt, MPI_Datatype const oldtype,
MPI_Datatype* const newtype)
{
assert (oldtype > 0);
*newtype = cnt * oldtype;
return 0;
}
int
MPI_Type_free (MPI_Datatype* const datatype)
{
/* do nothing */
return 0;
}
int
MPI_Type_lb (MPI_Datatype const datatype, MPI_Aint* const displacement)
{
assert (displacement);
*displacement = 0;
return 0;
}
int
MPI_Type_size (MPI_Datatype const datatype, int* const size)
{
assert (datatype > 0);
assert (size);
*size = datatype;
return 0;
}
int
MPI_Type_struct (int const cnt,
int* const array_of_blocklengths,
MPI_Aint* const array_of_displacements,
MPI_Datatype* const array_of_types,
MPI_Datatype* const newtype)
{
assert (cnt >= 0);
assert (array_of_blocklengths);
assert (array_of_displacements);
assert (array_of_types);
assert (newtype);
MPI_Aint newsize = 0;
for (int n=0; n<cnt; ++n) {
assert (array_of_displacements[n] >= 0);
assert (array_of_blocklengths[n] >= 0);
MPI_Aint size;
if (array_of_types[n] == MPI_UB) {
size = array_of_displacements[n];
} else {
assert (array_of_types[n] > 0);
size =
array_of_displacements[n] +
array_of_blocklengths[n] * array_of_types[n];
}
if (size > newsize) newsize = size;
}
*newtype = newsize;
return 0;
}
int
MPI_Type_ub (MPI_Datatype const datatype, MPI_Aint* const displacement)
{
assert (datatype > 0);
assert (displacement);
*displacement = datatype;
return 0;
}
int
MPI_Type_vector (int const cnt, int const blocklength, int const stride,
MPI_Datatype const oldtype, MPI_Datatype* const newtype)
{
assert (cnt >= 0);
assert (blocklength >= 0);
assert (stride > 0);
assert (oldtype > 0);
if (cnt == 0) {
*newtype = 0;
} else {
*newtype = (cnt * blocklength + (cnt-1) * stride) * oldtype;
}
return 0;
}
int
MPI_Waitall (int const cnt, MPI_Request* const array_of_requests,
MPI_Status* const array_of_statuses)
{
assert (cnt >= 0);
assert (array_of_requests);
return 0;
}
double
MPI_Wtime (void)
{
struct timeval tp;
gettimeofday (&tp, NULL);
return tp.tv_sec + tp.tv_usec / 1.0e+6;
}
#endif /* #ifndef CCTK_MPI */
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