261. Data Access with Explicit Offsets


Up: Data Access Next: Data Access with Individual File Pointers Previous: Data Access Conventions

If MPI_MODE_SEQUENTIAL mode was specified when the file was opened, it is erroneous to call the routines in this section.

MPI_FILE_READ_AT(fh, offset, buf, count, datatype, status)
IN fhfile handle (handle)
IN offsetfile offset (integer)
OUT bufinitial address of buffer (choice)
IN countnumber of elements in buffer (integer)
IN datatypedatatype of each buffer element (handle)
OUT statusstatus object (Status)

int MPI_File_read_at(MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Status *status)
MPI_FILE_READ_AT(FH, OFFSET, BUF, COUNT, DATATYPE, STATUS, IERROR)
<type> BUF(*)
INTEGER FH, COUNT, DATATYPE, STATUS(MPI_STATUS_SIZE), IERROR
INTEGER(KIND=MPI_OFFSET_KIND) OFFSET
{ void MPI::File::Read_at(MPI::Offset offset, void* buf, int count, const MPI::Datatype& datatype, MPI::Status& status) (binding deprecated, see Section Deprecated since MPI-2.2 ) }
{ void MPI::File::Read_at(MPI::Offset offset, void* buf, int count, const MPI::Datatype& datatype) (binding deprecated, see Section Deprecated since MPI-2.2 ) }

MPI_FILE_READ_AT reads a file beginning at the position specified by offset.

MPI_FILE_READ_AT_ALL(fh, offset, buf, count, datatype, status)
IN fhfile handle (handle)
IN offsetfile offset (integer)
OUT bufinitial address of buffer (choice)
IN countnumber of elements in buffer (integer)
IN datatypedatatype of each buffer element (handle)
OUT statusstatus object (Status)

int MPI_File_read_at_all(MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Status *status)
MPI_FILE_READ_AT_ALL(FH, OFFSET, BUF, COUNT, DATATYPE, STATUS, IERROR)
<type> BUF(*)
INTEGER FH, COUNT, DATATYPE, STATUS(MPI_STATUS_SIZE), IERROR
INTEGER(KIND=MPI_OFFSET_KIND) OFFSET
{ void MPI::File::Read_at_all(MPI::Offset offset, void* buf, int count, const MPI::Datatype& datatype, MPI::Status& status) (binding deprecated, see Section Deprecated since MPI-2.2 ) }
{ void MPI::File::Read_at_all(MPI::Offset offset, void* buf, int count, const MPI::Datatype& datatype) (binding deprecated, see Section Deprecated since MPI-2.2 ) }

MPI_FILE_READ_AT_ALL is a collective version of the blocking MPI_FILE_READ_AT interface.

MPI_FILE_WRITE_AT(fh, offset, buf, count, datatype, status)
INOUT fhfile handle (handle)
IN offsetfile offset (integer)
IN bufinitial address of buffer (choice)
IN countnumber of elements in buffer (integer)
IN datatypedatatype of each buffer element (handle)
OUT statusstatus object (Status)

int MPI_File_write_at(MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Status *status)
MPI_FILE_WRITE_AT(FH, OFFSET, BUF, COUNT, DATATYPE, STATUS, IERROR)
<type> BUF(*)
INTEGER FH, COUNT, DATATYPE, STATUS(MPI_STATUS_SIZE), IERROR
INTEGER(KIND=MPI_OFFSET_KIND) OFFSET
{ void MPI::File::Write_at(MPI::Offset offset, const void* buf, int count, const MPI::Datatype& datatype, MPI::Status& status) (binding deprecated, see Section Deprecated since MPI-2.2 ) }
{ void MPI::File::Write_at(MPI::Offset offset, const void* buf, int count, const MPI::Datatype& datatype) (binding deprecated, see Section Deprecated since MPI-2.2 ) }

MPI_FILE_WRITE_AT writes a file beginning at the position specified by offset.

MPI_FILE_WRITE_AT_ALL(fh, offset, buf, count, datatype, status)
INOUT fhfile handle (handle)
IN offsetfile offset (integer)
IN bufinitial address of buffer (choice)
IN countnumber of elements in buffer (integer)
IN datatypedatatype of each buffer element (handle)
OUT statusstatus object (Status)

int MPI_File_write_at_all(MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Status *status)
MPI_FILE_WRITE_AT_ALL(FH, OFFSET, BUF, COUNT, DATATYPE, STATUS, IERROR)
<type> BUF(*)
INTEGER FH, COUNT, DATATYPE, STATUS(MPI_STATUS_SIZE), IERROR
INTEGER(KIND=MPI_OFFSET_KIND) OFFSET
{ void MPI::File::Write_at_all(MPI::Offset offset, const void* buf, int count, const MPI::Datatype& datatype, MPI::Status& status) (binding deprecated, see Section Deprecated since MPI-2.2 ) }
{ void MPI::File::Write_at_all(MPI::Offset offset, const void* buf, int count, const MPI::Datatype& datatype) (binding deprecated, see Section Deprecated since MPI-2.2 ) }

MPI_FILE_WRITE_AT_ALL is a collective version of the blocking MPI_FILE_WRITE_AT interface.

MPI_FILE_IREAD_AT(fh, offset, buf, count, datatype, request)
IN fhfile handle (handle)
IN offsetfile offset (integer)
OUT bufinitial address of buffer (choice)
IN countnumber of elements in buffer (integer)
IN datatypedatatype of each buffer element (handle)
OUT requestrequest object (handle)

int MPI_File_iread_at(MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Request *request)
MPI_FILE_IREAD_AT(FH, OFFSET, BUF, COUNT, DATATYPE, REQUEST, IERROR)
<type> BUF(*)
INTEGER FH, COUNT, DATATYPE, REQUEST, IERROR
INTEGER(KIND=MPI_OFFSET_KIND) OFFSET
{ MPI::Request MPI::File::Iread_at(MPI::Offset offset, void* buf, int count, const MPI::Datatype& datatype) (binding deprecated, see Section Deprecated since MPI-2.2 ) }

MPI_FILE_IREAD_AT is a nonblocking version of the MPI_FILE_READ_AT interface.

MPI_FILE_IWRITE_AT(fh, offset, buf, count, datatype, request)
INOUT fhfile handle (handle)
IN offsetfile offset (integer)
IN bufinitial address of buffer (choice)
IN countnumber of elements in buffer (integer)
IN datatypedatatype of each buffer element (handle)
OUT requestrequest object (handle)

int MPI_File_iwrite_at(MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Request *request)
MPI_FILE_IWRITE_AT(FH, OFFSET, BUF, COUNT, DATATYPE, REQUEST, IERROR)
<type> BUF(*)
INTEGER FH, COUNT, DATATYPE, REQUEST, IERROR
INTEGER(KIND=MPI_OFFSET_KIND) OFFSET
{ MPI::Request MPI::File::Iwrite_at(MPI::Offset offset, const void* buf, int count, const MPI::Datatype& datatype) (binding deprecated, see Section Deprecated since MPI-2.2 ) }

MPI_FILE_IWRITE_AT is a nonblocking version of the MPI_FILE_WRITE_AT interface.



Up: Data Access Next: Data Access with Individual File Pointers Previous: Data Access Conventions


Return to MPI-2.2 Standard Index
Return to MPI Forum Home Page

(Unofficial) MPI-2.2 of September 4, 2009
HTML Generated on September 10, 2009