nm_mpi_datatype.h File Reference

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Functions
Functions: User-defined datatypes and packing
int	MPI_Type_size (MPI_Datatype datatype, int *size)
	Returns the total size, in bytes, of the entries in the type signature associated with datatype.
int	MPI_Type_size_c (MPI_Datatype datatype, MPI_Count *size)
int	MPI_Type_size_x (MPI_Datatype datatype, MPI_Count *size)
int	MPI_Type_get_extent (MPI_Datatype datatype, MPI_Aint *lb, MPI_Aint *extent)
	Returns the lower bound and the extent of datatype.
int	MPI_Type_get_extent_c (MPI_Datatype datatype, MPI_Count *lb, MPI_Count *extent)
int	MPI_Type_get_extent_x (MPI_Datatype datatype, MPI_Count *lb, MPI_Count *extent)
int	MPI_Type_extent (MPI_Datatype datatype, MPI_Aint *extent) __attribute__((deprecated))
	Returns the extent of the datatype.
int	MPI_Type_get_true_extent (MPI_Datatype datatype, MPI_Aint *true_lb, MPI_Aint *true_extent)
int	MPI_Type_get_true_extent_c (MPI_Datatype datatype, MPI_Count *true_lb, MPI_Count *true_extent)
int	MPI_Type_get_true_extent_x (MPI_Datatype datatype, MPI_Count *true_lb, MPI_Count *true_extent)
int	MPI_Type_lb (MPI_Datatype datatype, MPI_Aint *lb) __attribute__((deprecated))
	Returns the lower bound of the datatype.
int	MPI_Type_ub (MPI_Datatype datatype, MPI_Aint *displacement) __attribute__((deprecated))
	Returns the upper bound of a datatype.
int	MPI_Type_create_resized (MPI_Datatype oldtype, MPI_Aint lb, MPI_Aint extent, MPI_Datatype *newtype)
	Returns in newtype a new datatype that is identical to oldtype, except that the lower bound of this new datatype is set to be lb, and its upper bound is set to lb + extent.
int	MPI_Type_create_resized_c (MPI_Datatype oldtype, MPI_Count lb, MPI_Count extent, MPI_Datatype *newtype)
int	MPI_Type_dup (MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_commit (MPI_Datatype *datatype)
	Commits the datatype.
int	MPI_Type_free (MPI_Datatype *datatype)
	Marks the datatype object associated with datatype for deallocation.
int	MPI_Type_contiguous (int count, MPI_Datatype oldtype, MPI_Datatype *newtype)
	Constructs a typemap consisting of the replication of a datatype into contiguous locations.
int	MPI_Type_contiguous_c (MPI_Count count, MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_vector (int count, int blocklength, int stride, MPI_Datatype oldtype, MPI_Datatype *newtype)
	Constructs a typemap consisting of the replication of a datatype into location that consist of equally spaced blocks.
int	MPI_Type_vector_c (MPI_Count count, MPI_Count blocklength, MPI_Count stride, MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_hvector (int count, int blocklength, MPI_Aint stride, MPI_Datatype oldtype, MPI_Datatype *newtype) __attribute__((deprecated))
	Constructs a typemap consisting of the replication of a datatype into location that consist of equally spaced blocks, assumes that the stride between successive blocks is a multiple of the oldtype extent.
int	MPI_Type_indexed (int count, const int array_of_blocklengths[], const int array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype)
	Constructs a typemap consisting of the replication of a datatype into a sequence of blocks, each block is a concatenation of the old datatype.
int	MPI_Type_indexed_c (MPI_Count count, const MPI_Count array_of_blocklengths[], const MPI_Count array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_hindexed (int count, int array_of_blocklengths[], MPI_Aint array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype) __attribute__((deprecated))
	Constructs a typemap consisting of the replication of a datatype into a sequence of blocks, each block is a concatenation of the old datatype; block displacements are specified in bytes, rather than in multiples of the old datatype extent.
int	MPI_Type_struct (int count, int *array_of_blocklengths, MPI_Aint *array_of_displacements, MPI_Datatype *array_of_types, MPI_Datatype *newtype) __attribute__((deprecated))
	Constructs a typemap consisting of the replication of different datatypes, with different block sizes.
int	MPI_Type_create_hindexed (int count, const int array_of_blocklengths[], const MPI_Aint array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_hindexed_c (MPI_Count count, const MPI_Count array_of_blocklengths[], const MPI_Count array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_hvector (int count, int blocklength, MPI_Aint hstride, MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_hvector_c (MPI_Count count, MPI_Count blocklength, MPI_Count hstride, MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_indexed_block (int count, int blocklength, const int array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_indexed_block_c (MPI_Count count, MPI_Count blocklength, const MPI_Count array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_hindexed_block (int count, int blocklength, const MPI_Aint array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_hindexed_block_c (MPI_Count count, MPI_Count blocklength, const MPI_Count array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_subarray (int ndims, const int array_of_sizes[], const int array_of_subsizes[], const int array_of_starts[], int order, MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_subarray_c (int ndims, const MPI_Count array_of_sizes[], const MPI_Count array_of_subsizes[], const MPI_Count array_of_starts[], int order, MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_darray (int size, int rank, int ndims, const int array_of_gsizes[], const int array_of_distribs[], const int array_of_dargs[], const int array_of_psizes[], int order, MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_darray_c (int size, int rank, int ndims, const MPI_Count array_of_gsizes[], const MPI_Count array_of_distribs[], const MPI_Count array_of_dargs[], const MPI_Count array_of_psizes[], int order, MPI_Datatype oldtype, MPI_Datatype *newtype)
int	MPI_Type_create_struct (int count, int array_of_blocklengths[], MPI_Aint array_of_displacements[], MPI_Datatype array_of_types[], MPI_Datatype *newtype)
int	MPI_Type_create_struct_c (MPI_Count count, MPI_Count array_of_blocklengths[], MPI_Count array_of_displacements[], MPI_Datatype array_of_types[], MPI_Datatype *newtype)
int	MPI_Type_get_envelope (MPI_Datatype datatype, int *num_integers, int *num_addresses, int *num_datatypes, int *combiner)
int	MPI_Type_get_envelope_c (MPI_Datatype datatype, MPI_Count *num_integers, MPI_Count *num_addresses, MPI_Count *num_large_counts, MPI_Count *num_datatypes, int *combiner)
int	MPI_Type_get_contents (MPI_Datatype datatype, int max_integers, int max_addresses, int max_datatypes, int array_of_integers[], MPI_Aint array_of_addresses[], MPI_Datatype array_of_datatypes[])
int	MPI_Type_get_contents_c (MPI_Datatype datatype, MPI_Count max_integers, MPI_Count max_addresses, MPI_Count max_large_counts, MPI_Count max_datatypes, int array_of_integers[], MPI_Aint array_of_addresses[], MPI_Count array_of_large_counts[], MPI_Datatype array_of_datatypes[])
int	MPI_Type_set_name (MPI_Datatype datatype, char *type_name)
int	MPI_Type_get_name (MPI_Datatype datatype, char *type_name, int *resultlen)
int	MPI_Type_create_keyval (MPI_Type_copy_attr_function *copy_fn, MPI_Type_delete_attr_function *delete_fn, int *keyval, void *extra_state)
int	MPI_Type_free_keyval (int *keyval)
int	MPI_Type_delete_attr (MPI_Datatype datatype, int keyval)
int	MPI_Type_set_attr (MPI_Datatype datatype, int datatype_keyval, void *attribute_val)
int	MPI_Type_get_attr (MPI_Datatype datatype, int datatype_keyval, void *attribute_val, int *flag)
int	MPI_Pack (const void *inbuf, int incount, MPI_Datatype datatype, void *outbuf, int outsize, int *position, MPI_Comm comm)
	Packs a message specified by inbuf, incount, datatype, comm into the buffer space specified by outbuf and outsize.
int	MPI_Pack_c (const void *inbuf, MPI_Count incount, MPI_Datatype datatype, void *outbuf, MPI_Count outsize, MPI_Count *position, MPI_Comm comm)
int	MPI_Unpack (const void *inbuf, int insize, int *position, void *outbuf, int outcount, MPI_Datatype datatype, MPI_Comm comm)
	Unpacks a message into the receive buffer specified by outbuf, outcount, datatype from the buffer space specified by inbuf and insize.
int	MPI_Unpack_c (const void *inbuf, MPI_Count insize, MPI_Count *position, void *outbuf, MPI_Count outcount, MPI_Datatype datatype, MPI_Comm comm)
int	MPI_Pack_size (int incount, MPI_Datatype datatype, MPI_Comm comm, int *size)
	Returns the upper bound on the amount of space needed to pack a message.
int	MPI_Pack_size_c (MPI_Count incount, MPI_Datatype datatype, MPI_Comm comm, MPI_Count *size)
int	MPI_Pack_external (const char datarep[], const void *inbuf, int incount, MPI_Datatype datatype, void *outbuf, MPI_Aint outsize, MPI_Aint *position)
int	MPI_Pack_external_c (const char datarep[], const void *inbuf, MPI_Count incount, MPI_Datatype datatype, void *outbuf, MPI_Count outsize, MPI_Count *position)
int	MPI_Unpack_external (const char datarep[], const void *inbuf, MPI_Aint insize, MPI_Aint *position, void *outbuf, int outcount, MPI_Datatype datatype)
int	MPI_Unpack_external_c (const char datarep[], const void *inbuf, MPI_Count insize, MPI_Count *position, void *outbuf, MPI_Count outcount, MPI_Datatype datatype)
int	MPI_Pack_external_size (const char datarep[], int incount, MPI_Datatype datatype, MPI_Aint *size)
int	MPI_Pack_external_size_c (const char datarep[], MPI_Count incount, MPI_Datatype datatype, MPI_Count *size)

Function Documentation

MPI_Pack()

int MPI_Pack	(	const void *	inbuf,
		int	incount,
		MPI_Datatype	datatype,
		void *	outbuf,
		int	outsize,
		int *	position,
		MPI_Comm	comm
	)

Packs a message specified by inbuf, incount, datatype, comm into the buffer space specified by outbuf and outsize.

The input buffer can be any communication buffer allowed in MPI_SEND. The output buffer is a contiguous storage area containing outsize bytes, starting at the address outbuf.

Parameters

inbuf	initial address of send buffer
incount	number of elements in send buffer
datatype	datatype of each send buffer element
outbuf
outsize
position
comm	communicator

Returns

MPI status

MPI_Pack_c()

int MPI_Pack_c	(	const void *	inbuf,
		MPI_Count	incount,
		MPI_Datatype	datatype,
		void *	outbuf,
		MPI_Count	outsize,
		MPI_Count *	position,
		MPI_Comm	comm
	)

MPI_Pack_external()

int MPI_Pack_external	(	const char	datarep[],
		const void *	inbuf,
		int	incount,
		MPI_Datatype	datatype,
		void *	outbuf,
		MPI_Aint	outsize,
		MPI_Aint *	position
	)

MPI_Pack_external_c()

int MPI_Pack_external_c	(	const char	datarep[],
		const void *	inbuf,
		MPI_Count	incount,
		MPI_Datatype	datatype,
		void *	outbuf,
		MPI_Count	outsize,
		MPI_Count *	position
	)

MPI_Pack_external_size()

int MPI_Pack_external_size	(	const char	datarep[],
		int	incount,
		MPI_Datatype	datatype,
		MPI_Aint *	size
	)

MPI_Pack_external_size_c()

int MPI_Pack_external_size_c	(	const char	datarep[],
		MPI_Count	incount,
		MPI_Datatype	datatype,
		MPI_Count *	size
	)

MPI_Pack_size()

int MPI_Pack_size	(	int	incount,
		MPI_Datatype	datatype,
		MPI_Comm	comm,
		int *	size
	)

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

Parameters

incount	count argument to packing call
datatype	datatype argument to packing call
comm	communicator argument to packing call
size	upper bound on size of packed message, in bytes

Returns

MPI status

MPI_Pack_size_c()

int MPI_Pack_size_c	(	MPI_Count	incount,
		MPI_Datatype	datatype,
		MPI_Comm	comm,
		MPI_Count *	size
	)

MPI_Type_commit()

int MPI_Type_commit

(

MPI_Datatype *

datatype

)

Commits the datatype.

Parameters

datatype

datatype that is committed

Returns

MPI status

MPI_Type_contiguous()

int MPI_Type_contiguous	(	int	count,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

Constructs a typemap consisting of the replication of a datatype into contiguous locations.

Parameters

count	replication count
oldtype	old datatype
newtype	new datatype

Returns

MPI status

MPI_Type_contiguous_c()

int MPI_Type_contiguous_c	(	MPI_Count	count,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_darray()

int MPI_Type_create_darray	(	int	size,
		int	rank,
		int	ndims,
		const int	array_of_gsizes[],
		const int	array_of_distribs[],
		const int	array_of_dargs[],
		const int	array_of_psizes[],
		int	order,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_darray_c()

int MPI_Type_create_darray_c	(	int	size,
		int	rank,
		int	ndims,
		const MPI_Count	array_of_gsizes[],
		const MPI_Count	array_of_distribs[],
		const MPI_Count	array_of_dargs[],
		const MPI_Count	array_of_psizes[],
		int	order,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_hindexed()

int MPI_Type_create_hindexed	(	int	count,
		const int	array_of_blocklengths[],
		const MPI_Aint	array_of_displacements[],
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_hindexed_block()

int MPI_Type_create_hindexed_block	(	int	count,
		int	blocklength,
		const MPI_Aint	array_of_displacements[],
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_hindexed_block_c()

int MPI_Type_create_hindexed_block_c	(	MPI_Count	count,
		MPI_Count	blocklength,
		const MPI_Count	array_of_displacements[],
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_hindexed_c()

int MPI_Type_create_hindexed_c	(	MPI_Count	count,
		const MPI_Count	array_of_blocklengths[],
		const MPI_Count	array_of_displacements[],
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_hvector()

int MPI_Type_create_hvector	(	int	count,
		int	blocklength,
		MPI_Aint	hstride,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_hvector_c()

int MPI_Type_create_hvector_c	(	MPI_Count	count,
		MPI_Count	blocklength,
		MPI_Count	hstride,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_indexed_block()

int MPI_Type_create_indexed_block	(	int	count,
		int	blocklength,
		const int	array_of_displacements[],
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_indexed_block_c()

int MPI_Type_create_indexed_block_c	(	MPI_Count	count,
		MPI_Count	blocklength,
		const MPI_Count	array_of_displacements[],
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_keyval()

int MPI_Type_create_keyval	(	MPI_Type_copy_attr_function *	copy_fn,
		MPI_Type_delete_attr_function *	delete_fn,
		int *	keyval,
		void *	extra_state
	)

MPI_Type_create_resized()

int MPI_Type_create_resized	(	MPI_Datatype	oldtype,
		MPI_Aint	lb,
		MPI_Aint	extent,
		MPI_Datatype *	newtype
	)

Returns in newtype a new datatype that is identical to oldtype, except that the lower bound of this new datatype is set to be lb, and its upper bound is set to lb + extent.

Parameters

oldtype	input datatype
lb	new lower bound of datatype
extent	new extent of datatype
newtype	output datatype

Returns

MPI status

MPI_Type_create_resized_c()

int MPI_Type_create_resized_c	(	MPI_Datatype	oldtype,
		MPI_Count	lb,
		MPI_Count	extent,
		MPI_Datatype *	newtype
	)

MPI_Type_create_struct()

int MPI_Type_create_struct	(	int	count,
		int	array_of_blocklengths[],
		MPI_Aint	array_of_displacements[],
		MPI_Datatype	array_of_types[],
		MPI_Datatype *	newtype
	)

MPI_Type_create_struct_c()

int MPI_Type_create_struct_c	(	MPI_Count	count,
		MPI_Count	array_of_blocklengths[],
		MPI_Count	array_of_displacements[],
		MPI_Datatype	array_of_types[],
		MPI_Datatype *	newtype
	)

MPI_Type_create_subarray()

int MPI_Type_create_subarray	(	int	ndims,
		const int	array_of_sizes[],
		const int	array_of_subsizes[],
		const int	array_of_starts[],
		int	order,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_create_subarray_c()

int MPI_Type_create_subarray_c	(	int	ndims,
		const MPI_Count	array_of_sizes[],
		const MPI_Count	array_of_subsizes[],
		const MPI_Count	array_of_starts[],
		int	order,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_delete_attr()

int MPI_Type_delete_attr	(	MPI_Datatype	datatype,
		int	keyval
	)

MPI_Type_dup()

int MPI_Type_dup	(	MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_extent()

int MPI_Type_extent	(	MPI_Datatype	datatype,
		MPI_Aint *	extent
	)

Returns the extent of the datatype.

Parameters

datatype	datatype
extent	extent of datatype

Returns

MPI status

MPI_Type_free()

int MPI_Type_free

(

MPI_Datatype *

datatype

)

Marks the datatype object associated with datatype for deallocation.

Parameters

datatype

datatype that is freed

Returns

MPI status

MPI_Type_free_keyval()

int MPI_Type_free_keyval

(

int *

keyval

)

MPI_Type_get_attr()

int MPI_Type_get_attr	(	MPI_Datatype	datatype,
		int	datatype_keyval,
		void *	attribute_val,
		int *	flag
	)

MPI_Type_get_contents()

int MPI_Type_get_contents	(	MPI_Datatype	datatype,
		int	max_integers,
		int	max_addresses,
		int	max_datatypes,
		int	array_of_integers[],
		MPI_Aint	array_of_addresses[],
		MPI_Datatype	array_of_datatypes[]
	)

MPI_Type_get_contents_c()

int MPI_Type_get_contents_c	(	MPI_Datatype	datatype,
		MPI_Count	max_integers,
		MPI_Count	max_addresses,
		MPI_Count	max_large_counts,
		MPI_Count	max_datatypes,
		int	array_of_integers[],
		MPI_Aint	array_of_addresses[],
		MPI_Count	array_of_large_counts[],
		MPI_Datatype	array_of_datatypes[]
	)

MPI_Type_get_envelope()

int MPI_Type_get_envelope	(	MPI_Datatype	datatype,
		int *	num_integers,
		int *	num_addresses,
		int *	num_datatypes,
		int *	combiner
	)

MPI_Type_get_envelope_c()

int MPI_Type_get_envelope_c	(	MPI_Datatype	datatype,
		MPI_Count *	num_integers,
		MPI_Count *	num_addresses,
		MPI_Count *	num_large_counts,
		MPI_Count *	num_datatypes,
		int *	combiner
	)

MPI_Type_get_extent()

int MPI_Type_get_extent	(	MPI_Datatype	datatype,
		MPI_Aint *	lb,
		MPI_Aint *	extent
	)

Returns the lower bound and the extent of datatype.

Parameters

datatype	datatype
lb	lower bound of datatype
extent	extent of datatype

Returns

MPI status

MPI_Type_get_extent_c()

int MPI_Type_get_extent_c	(	MPI_Datatype	datatype,
		MPI_Count *	lb,
		MPI_Count *	extent
	)

MPI_Type_get_extent_x()

int MPI_Type_get_extent_x	(	MPI_Datatype	datatype,
		MPI_Count *	lb,
		MPI_Count *	extent
	)

MPI_Type_get_name()

int MPI_Type_get_name	(	MPI_Datatype	datatype,
		char *	type_name,
		int *	resultlen
	)

MPI_Type_get_true_extent()

int MPI_Type_get_true_extent	(	MPI_Datatype	datatype,
		MPI_Aint *	true_lb,
		MPI_Aint *	true_extent
	)

MPI_Type_get_true_extent_c()

int MPI_Type_get_true_extent_c	(	MPI_Datatype	datatype,
		MPI_Count *	true_lb,
		MPI_Count *	true_extent
	)

MPI_Type_get_true_extent_x()

int MPI_Type_get_true_extent_x	(	MPI_Datatype	datatype,
		MPI_Count *	true_lb,
		MPI_Count *	true_extent
	)

MPI_Type_hindexed()

int MPI_Type_hindexed	(	int	count,
		int	array_of_blocklengths[],
		MPI_Aint	array_of_displacements[],
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

Constructs a typemap consisting of the replication of a datatype into a sequence of blocks, each block is a concatenation of the old datatype; block displacements are specified in bytes, rather than in multiples of the old datatype extent.

Parameters

count	number of blocks – also number of entries in array_of_displacements and array_of_blocklengths
array_of_blocklengths	number of elements per block
array_of_displacements	byte displacement of each block
oldtype	old datatype
newtype	new datatype

Returns

MPI status

MPI_Type_hvector()

int MPI_Type_hvector	(	int	count,
		int	blocklength,
		MPI_Aint	stride,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

Constructs a typemap consisting of the replication of a datatype into location that consist of equally spaced blocks, assumes that the stride between successive blocks is a multiple of the oldtype extent.

Parameters

count	number of blocks
blocklength	number of elements in each block
stride	number of bytes between start of each block
oldtype	old datatype
newtype	new datatype

Returns

MPI status

MPI_Type_indexed()

int MPI_Type_indexed	(	int	count,
		const int	array_of_blocklengths[],
		const int	array_of_displacements[],
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

Constructs a typemap consisting of the replication of a datatype into a sequence of blocks, each block is a concatenation of the old datatype.

Parameters

count	number of blocks – also number of entries in array_of_displacements and array_of_blocklengths
array_of_blocklengths	number of elements per block
array_of_displacements	displacement for each block, in multiples of oldtype extent
oldtype	old datatype
newtype	new datatype

Returns

MPI status

MPI_Type_indexed_c()

int MPI_Type_indexed_c	(	MPI_Count	count,
		const MPI_Count	array_of_blocklengths[],
		const MPI_Count	array_of_displacements[],
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Type_lb()

int MPI_Type_lb	(	MPI_Datatype	datatype,
		MPI_Aint *	lb
	)

Returns the lower bound of the datatype.

Parameters

datatype	datatype
lb	lower bound of datatype

Returns

MPI status

MPI_Type_set_attr()

int MPI_Type_set_attr	(	MPI_Datatype	datatype,
		int	datatype_keyval,
		void *	attribute_val
	)

MPI_Type_set_name()

int MPI_Type_set_name	(	MPI_Datatype	datatype,
		char *	type_name
	)

MPI_Type_size()

int MPI_Type_size	(	MPI_Datatype	datatype,
		int *	size
	)

Returns the total size, in bytes, of the entries in the type signature associated with datatype.

Parameters

datatype	datatype
size	datatype size

Returns

MPI status

MPI_Type_size_c()

int MPI_Type_size_c	(	MPI_Datatype	datatype,
		MPI_Count *	size
	)

MPI_Type_size_x()

int MPI_Type_size_x	(	MPI_Datatype	datatype,
		MPI_Count *	size
	)

MPI_Type_struct()

int MPI_Type_struct	(	int	count,
		int *	array_of_blocklengths,
		MPI_Aint *	array_of_displacements,
		MPI_Datatype *	array_of_types,
		MPI_Datatype *	newtype
	)

Constructs a typemap consisting of the replication of different datatypes, with different block sizes.

Parameters

count	number of blocks – also number of entries in arrays array_of_types, array_of_displacements and array_of_blocklengths
array_of_blocklengths	number of elements in each block
array_of_displacements	byte displacement of each block
array_of_types	type of elements in each block
newtype	new datatype

Returns

MPI status

MPI_Type_ub()

int MPI_Type_ub	(	MPI_Datatype	datatype,
		MPI_Aint *	displacement
	)

Returns the upper bound of a datatype.

MPI_Type_vector()

int MPI_Type_vector	(	int	count,
		int	blocklength,
		int	stride,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

Constructs a typemap consisting of the replication of a datatype into location that consist of equally spaced blocks.

Parameters

count	number of blocks
blocklength	number of elements in each block
stride	number of elements between start of each block
oldtype	old datatype
newtype	new datatype

Returns

MPI status

MPI_Type_vector_c()

int MPI_Type_vector_c	(	MPI_Count	count,
		MPI_Count	blocklength,
		MPI_Count	stride,
		MPI_Datatype	oldtype,
		MPI_Datatype *	newtype
	)

MPI_Unpack()

int MPI_Unpack	(	const void *	inbuf,
		int	insize,
		int *	position,
		void *	outbuf,
		int	outcount,
		MPI_Datatype	datatype,
		MPI_Comm	comm
	)

Unpacks a message into the receive buffer specified by outbuf, outcount, datatype from the buffer space specified by inbuf and insize.

The output buffer can be any communication buffer allowed in MPI_RECV. The input buffer is a contiguous storage area containing insize bytes, starting at address inbuf. The input value of position is the position in the input buffer where one wishes the unpacking to begin. The output value of position is incremented by the size of the packed message, so that it can be used as input to a subsequent call to MPI_UNPACK.

Parameters

inbuf	initial address of receive buffer
insize	number of elements in receive buffer
position
outbuf
outcount
datatype	datatype of each receive buffer element
comm	communicator

Returns

MPI status

MPI_Unpack_c()

int MPI_Unpack_c	(	const void *	inbuf,
		MPI_Count	insize,
		MPI_Count *	position,
		void *	outbuf,
		MPI_Count	outcount,
		MPI_Datatype	datatype,
		MPI_Comm	comm
	)

MPI_Unpack_external()

int MPI_Unpack_external	(	const char	datarep[],
		const void *	inbuf,
		MPI_Aint	insize,
		MPI_Aint *	position,
		void *	outbuf,
		int	outcount,
		MPI_Datatype	datatype
	)

MPI_Unpack_external_c()

int MPI_Unpack_external_c	(	const char	datarep[],
		const void *	inbuf,
		MPI_Count	insize,
		MPI_Count *	position,
		void *	outbuf,
		MPI_Count	outcount,
		MPI_Datatype	datatype
	)