MPI Datatype Functions

In this section

• MPI_Get_address
  Gets the address of a location in memory.

• MPI_Get_elements
  Returns the number of basic elements in a datatype.

• MPI_Pack
  Packs a datatype into contiguous memory.

• MPI_Pack_external
  Packs a datatype into contiguous memory, using the external32 format.

• MPI_Pack_external_size
  Returns the upper bound on the amount of space needed to pack a message using MPI_Pack_external.

• MPI_Pack_size
  Returns the upper bound on the amount of space needed to pack a message.

• MPI_Type_commit
  Commits the datatype.

• MPI_Type_contiguous
  Defines a new data type that is a concatenation of a number of elements of an existing data type.

• MPI_Type_create_darray
  Creates a datatype representing a distributed array.

• MPI_Type_create_hindexed
  Defines a new data type that consists of a specified number of blocks of arbitrary size.

• MPI_Type_create_hindexed_block
  Allows replication of an old datatype into a sequence of blocks (each block is a concatenation of the old datatype), where all blocks have the same block length but can have different block displacements in bytes.

• MPI_Type_create_hvector
  Defines a new data type that consists of a specified number of blocks. Each block is a concatenation of the same number of elements of an existing data type.

• MPI_Type_create_indexed_block
  Defines a new data type that consists of a specified number of blocks. Each block is the same block length, but each block can have a different block displacement.

• MPI_Type_create_resized
  Creates a datatype with a new lower bound and extent from an existing datatype.

• MPI_Type_create_struct
  Defines a new data type with a specified data type, displacement, and size for each block of data.

• MPI_Type_create_subarray
  Defines a new data type that consists of an n-dimensional subarray of an n-dimensional array.

• MPI_Type_dup
  Duplicates a datatype.

• MPI_Type_free
  Frees the datatype.

• MPI_Type_get_contents
  Gets the type contents.

• MPI_Type_get_envelope
  Gets the type envelope.

• MPI_Type_get_extent
  Gets the lower bound and extent for a datatype.

• MPI_Type_get_true_extent
  Gets the true lower bound and extent for a datatype.

• MPI_Type_indexed
  Defines a new data type that consists of a specified number of blocks of arbitrary size.

• MPI_Type_size
  Returns the number of bytes occupied by entries in the datatype.

• MPI_Type_vector
  Defines a new data type that consists of a specified number of blocks of a specified size.

• MPI_Unpack
  Unpacks a buffer according to a datatype into contiguous memory.

• MPI_Unpack_external
  Unpacks a buffer (packed with MPI_Pack_external) according to a datatype into contiguous memory.