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#ifndef DIST_HH
#define DIST_HH
#include <cassert>
#include <cstdio>
#include <cstdlib>
#if 0
#include <complex>
#endif
#include <mpi.h>
#include "cctk.h"
#include "defs.hh"
using namespace std;
namespace dist {
extern MPI_Comm comm_;
#if 0
extern MPI_Datatype mpi_complex_float;
extern MPI_Datatype mpi_complex_double;
extern MPI_Datatype mpi_complex_long_double;
#else
extern MPI_Datatype mpi_complex8;
extern MPI_Datatype mpi_complex16;
extern MPI_Datatype mpi_complex32;
#endif
void init (int& argc, char**& argv);
void pseudoinit (MPI_Comm const c);
void finalize ();
// Debugging output
#define CHECKPOINT dist::checkpoint(__FILE__, __LINE__)
void checkpoint (const char* file, int line);
// Information about the communicator
// Return the communicator
inline MPI_Comm comm ()
{
return comm_;
}
// Always return a good communicator
inline MPI_Comm goodcomm ()
{
return comm_ != MPI_COMM_NULL ? comm_ : MPI_COMM_WORLD;
}
// Rank in the communicator (this processor's number, 0 .. size-1)
inline int rank ()
{
static int rank_ = -1;
if (rank_ == -1) MPI_Comm_rank (comm(), &rank_);
return rank_;
}
// Size of the communicator
inline int size ()
{
static int size_ = -1;
if (size_ == -1) MPI_Comm_size (comm(), &size_);
return size_;
}
/////////////////////////////////////////////////////////////////////////
// C Datatype helpers
// Map a C datatype to a 0-based index running up to c_ndatatypes().
/////////////////////////////////////////////////////////////////////////
inline unsigned int c_datatype (const char&)
{ return 0; }
inline unsigned int c_datatype (const signed char&)
{ return 1; }
inline unsigned int c_datatype (const unsigned char&)
{ return 2; }
inline unsigned int c_datatype (const short&)
{ return 3; }
inline unsigned int c_datatype (const unsigned short&)
{ return 4; }
inline unsigned int c_datatype (const int&)
{ return 5; }
inline unsigned int c_datatype (const unsigned int&)
{ return 6; }
inline unsigned int c_datatype (const long&)
{ return 7; }
inline unsigned int c_datatype (const unsigned long&)
{ return 8; }
inline unsigned int c_datatype (const long long&)
{ return 9; }
inline unsigned int c_datatype (const float&)
{ return 10; }
inline unsigned int c_datatype (const double&)
{ return 11; }
inline unsigned int c_datatype (const long double&)
{ return 12; }
#if 0
inline unsigned int c_datatype (const complex<float>&)
{ return 13; }
inline unsigned int c_datatype (const complex<double>&)
{ return 14; }
inline unsigned int c_datatype (const complex<long double>&)
{ return 15; }
#else
# ifdef HAVE_CCTK_COMPLEX8
inline unsigned int c_datatype (const CCTK_COMPLEX8&)
{ return 13; }
# endif
# ifdef HAVE_CCTK_COMPLEX16
inline unsigned int c_datatype (const CCTK_COMPLEX16&)
{ return 14; }
# endif
# ifdef HAVE_CCTK_COMPLEX32
inline unsigned int c_datatype (const CCTK_COMPLEX32&)
{ return 15; }
# endif
#endif
// keep this function's return code consistent with functions above
inline unsigned int c_ndatatypes ()
{ return 16; }
/////////////////////////////////////////////////////////////////
// MPI Datatype helpers
// Map a C datatype to its corresponding MPI datatype.
/////////////////////////////////////////////////////////////////
inline MPI_Datatype datatype (const char&)
{ return MPI_CHAR; }
inline MPI_Datatype datatype (const signed char&)
{ return MPI_UNSIGNED_CHAR; }
inline MPI_Datatype datatype (const unsigned char&)
{ return MPI_BYTE; }
inline MPI_Datatype datatype (const short&)
{ return MPI_SHORT; }
inline MPI_Datatype datatype (const unsigned short&)
{ return MPI_UNSIGNED_SHORT; }
inline MPI_Datatype datatype (const int&)
{ return MPI_INT; }
inline MPI_Datatype datatype (const unsigned int&)
{ return MPI_UNSIGNED; }
inline MPI_Datatype datatype (const long&)
{ return MPI_LONG; }
inline MPI_Datatype datatype (const unsigned long&)
{ return MPI_UNSIGNED_LONG; }
inline MPI_Datatype datatype (const long long&)
{ return MPI_LONG_LONG_INT; }
inline MPI_Datatype datatype (const float&)
{ return MPI_FLOAT; }
inline MPI_Datatype datatype (const double&)
{ return MPI_DOUBLE; }
inline MPI_Datatype datatype (const long double&)
{ return MPI_LONG_DOUBLE; }
#if 0
inline MPI_Datatype datatype (const complex<float>&)
{ return mpi_complex_float; }
inline MPI_Datatype datatype (const complex<double>&)
{ return mpi_complex_double; }
inline MPI_Datatype datatype (const complex<long double>&)
{ return mpi_complex_long_double; }
#else
# ifdef HAVE_CCTK_COMPLEX8
inline MPI_Datatype datatype (const CCTK_COMPLEX8&)
{ return mpi_complex8; }
# endif
# ifdef HAVE_CCTK_COMPLEX16
inline MPI_Datatype datatype (const CCTK_COMPLEX16&)
{ return mpi_complex16; }
# endif
# ifdef HAVE_CCTK_COMPLEX32
inline MPI_Datatype datatype (const CCTK_COMPLEX32&)
{ return mpi_complex32; }
# endif
#endif
} // namespace dist
#endif // DIST_HH
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