generic_communication.hpp File Reference

#include "./datatypes.hpp"
#include "./lazy.hpp"
#include "./utils.hpp"
#include <mpi.h>
#include <type_traits>
#include <utility>
#include <vector>

Detailed Description

Provides generic implementations for a subset of collective MPI communications (broadcast, reduce, gather, scatter).

The generic functions (mpi::broadcast, mpi::reduce, mpi::scatter, ...) call their more specialized counterparts (e.g. mpi::mpi_broadcast, mpi::mpi_reduce, mpi::mpi_scatter, ...). They depend on ADL.

Definition in file generic_communication.hpp.

Go to the source code of this file.

Functions
template<typename T >
bool	mpi::all_equal (T const &x, communicator c={})
	Checks if a given object is equal across all ranks in the given communicator.
template<typename T >
decltype(auto)	mpi::all_gather (T &&x, communicator c={})
	Generic MPI all-gather.
template<typename T >
decltype(auto)	mpi::all_reduce (T &&x, communicator c={}, MPI_Op op=MPI_SUM)
	Generic MPI all-reduce.
template<typename T >
void	mpi::all_reduce_in_place (T &&x, communicator c={}, MPI_Op op=MPI_SUM)
	Generic MPI all-reduce in-place.
template<typename T >
void	mpi::broadcast (T &&x, communicator c={}, int root=0)
	Generic MPI broadcast.
template<typename T >
decltype(auto)	mpi::gather (T &&x, mpi::communicator c={}, int root=0, bool all=false)
	Generic MPI gather.
template<typename T > requires (has_mpi_type<T>)
void	mpi::mpi_broadcast (T &x, communicator c={}, int root=0)
	Implementation of an MPI broadcast for types that have a corresponding MPI datatype, i.e. for which a specialization of mpi::mpi_type has been defined.
template<typename T > requires (has_mpi_type<T>)
T	mpi::mpi_reduce (T const &x, communicator c={}, int root=0, bool all=false, MPI_Op op=MPI_SUM)
	Implementation of an MPI reduce for types that have a corresponding MPI datatype, i.e. for which a specialization of mpi::mpi_type has been defined.
template<typename T > requires (has_mpi_type<T>)
void	mpi::mpi_reduce_in_place (T &x, communicator c={}, int root=0, bool all=false, MPI_Op op=MPI_SUM)
	Implementation of an in-place MPI reduce for types that have a corresponding MPI datatype, i.e. for which a specialization of mpi::mpi_type has been defined.
template<typename T >
decltype(auto)	mpi::reduce (T &&x, communicator c={}, int root=0, bool all=false, MPI_Op op=MPI_SUM)
	Generic MPI reduce.
template<typename T >
void	mpi::reduce_in_place (T &&x, communicator c={}, int root=0, bool all=false, MPI_Op op=MPI_SUM)
	Generic in-place MPI reduce.
template<typename T >
decltype(auto)	mpi::scatter (T &&x, mpi::communicator c={}, int root=0)
	Generic MPI scatter.