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#ifndef DIST_HH
#define DIST_HH
#include <cassert>
#include <cstdio>
#include <cstdlib>
#include <mpi.h>
#ifdef _OPENMP
# include <omp.h>
#endif
#include "cctk.h"
#include "defs.hh"
using namespace std;
namespace dist {
extern MPI_Comm comm_;
extern MPI_Datatype mpi_complex8;
extern MPI_Datatype mpi_complex16;
extern MPI_Datatype mpi_complex32;
void init (int& argc, char**& argv);
void pseudoinit (MPI_Comm const c);
void finalize ();
// Create MPI datatypes from C structures
struct mpi_struct_descr_t {
int blocklength;
MPI_Aint displacement;
MPI_Datatype type;
};
void create_mpi_datatype (size_t const count,
mpi_struct_descr_t const descr[],
MPI_Datatype & newtype);
// 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_;
}
// Set number of threads
void set_num_threads (int num_threads);
// Local number of threads
inline int num_threads ()
{
static int num_threads_ = -1;
if (num_threads_ == -1) {
#ifdef _OPENMP
num_threads_ = omp_get_max_threads();
#else
num_threads_ = 1;
#endif
assert (num_threads_ >= 1);
}
return num_threads_;
}
// Global number of threads
int total_num_threads_worker ();
inline int total_num_threads ()
{
static int total_num_threads_ = -1;
if (total_num_threads_ == -1) {
total_num_threads_ = total_num_threads_worker();
}
return total_num_threads_;
}
/////////////////////////////////////////////////////////////////////////
// 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; }
#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
// keep this function's return code consistent with functions above
inline unsigned int c_ndatatypes ()
{ return 16; }
template <typename T> unsigned int c_datatype () { abort(); }
template<> inline unsigned int c_datatype <char> () { return 0; }
template<> inline unsigned int c_datatype <signed char> () { return 1; }
template<> inline unsigned int c_datatype <unsigned char> () { return 2; }
template<> inline unsigned int c_datatype <short> () { return 3; }
template<> inline unsigned int c_datatype <unsigned short> () { return 4; }
template<> inline unsigned int c_datatype <int> () { return 5; }
template<> inline unsigned int c_datatype <unsigned int> () { return 6; }
template<> inline unsigned int c_datatype <long> () { return 7; }
template<> inline unsigned int c_datatype <unsigned long> () { return 8; }
template<> inline unsigned int c_datatype <long long> () { return 9; }
template<> inline unsigned int c_datatype <float> () { return 10; }
template<> inline unsigned int c_datatype <double> () { return 11; }
template<> inline unsigned int c_datatype <long double> () { return 12; }
#ifdef HAVE_CCTK_COMPLEX8
template<> inline unsigned int c_datatype <CCTK_COMPLEX8> () { return 13; }
#endif
#ifdef HAVE_CCTK_COMPLEX16
template<> inline unsigned int c_datatype <CCTK_COMPLEX16> () { return 14; }
#endif
#ifdef HAVE_CCTK_COMPLEX32
template<> inline unsigned int c_datatype <CCTK_COMPLEX32> () { return 15; }
#endif
/////////////////////////////////////////////////////////////////
// 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_CHAR; }
inline MPI_Datatype datatype (const unsigned char&)
{ return MPI_UNSIGNED_CHAR; }
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; }
#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
template <typename T> MPI_Datatype datatype () { abort(); }
template<> inline MPI_Datatype datatype <char> () { return MPI_CHAR; }
template<> inline MPI_Datatype datatype <signed char> () { return MPI_CHAR; }
template<> inline MPI_Datatype datatype <unsigned char> () { return MPI_UNSIGNED_CHAR; }
template<> inline MPI_Datatype datatype <short> () { return MPI_SHORT; }
template<> inline MPI_Datatype datatype <unsigned short> () { return MPI_UNSIGNED_SHORT; }
template<> inline MPI_Datatype datatype <int> () { return MPI_INT; }
template<> inline MPI_Datatype datatype <unsigned int> () { return MPI_UNSIGNED; }
template<> inline MPI_Datatype datatype <long> () { return MPI_LONG; }
template<> inline MPI_Datatype datatype <unsigned long> () { return MPI_UNSIGNED_LONG; }
template<> inline MPI_Datatype datatype <long long> () { return MPI_LONG_LONG_INT; }
template<> inline MPI_Datatype datatype <float> () { return MPI_FLOAT; }
template<> inline MPI_Datatype datatype <double> () { return MPI_DOUBLE; }
template<> inline MPI_Datatype datatype <long double> () { return MPI_LONG_DOUBLE; }
#ifdef HAVE_CCTK_COMPLEX8
template<> inline MPI_Datatype datatype <CCTK_COMPLEX8> () { return mpi_complex8; }
#endif
#ifdef HAVE_CCTK_COMPLEX16
template<> inline MPI_Datatype datatype <CCTK_COMPLEX16> () { return mpi_complex16; }
#endif
#ifdef HAVE_CCTK_COMPLEX32
template<> inline MPI_Datatype datatype <CCTK_COMPLEX32> () { return mpi_complex32; }
#endif
} // namespace dist
#endif // DIST_HH
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