mpi_pack(3) [debian man page]

MPI_Pack(3)								MPI							       MPI_Pack(3)

NAME

       MPI_Pack -  Packs a datatype into contiguous memory

SYNOPSIS

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

INPUT PARAMETERS

       inbuf  - input buffer start (choice)
       incount
	      - number of input data items (non-negative integer)
       datatype
	      - datatype of each input data item (handle)
       outcount
	      - output buffer size, in bytes (non-negative integer)
       comm   - communicator for packed message (handle)

OUTPUT PARAMETER

       outbuf - output buffer start (choice)

INPUT
/OUTPUT PARAMETER
       position
	      - current position in buffer, in bytes (integer)

NOTES (FROM THE SPECIFICATIONS)
       The  input value of position is the first location in the output buffer to be used for packing.	position is incremented by the size of the
       packed message, and the output value of position is the first location in the output buffer following the locations occupied by the  packed
       message.  The comm argument is the communicator that will be subsequently used for sending the packed message.

NOTES FOR FORTRAN

       All  MPI  routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the end of the argument list.  ierr
       is an integer and has the same meaning as the return value of the routine in C.	In Fortran, MPI routines are subroutines, and are  invoked
       with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

ERRORS

       All  MPI  routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of the function and Fortran routines in
       the last argument.  Before the value is returned, the current MPI error handler is called.  By default, this error handler aborts  the  MPI
       job.   The  error  handler  may	be  changed  with  MPI_Comm_set_errhandler  (for  communicators), MPI_File_set_errhandler (for files), and
       MPI_Win_set_errhandler (for RMA windows).  The MPI-1 routine MPI_Errhandler_set may be used but its  use  is  deprecated.   The	predefined
       error handler MPI_ERRORS_RETURN may be used to cause error values to be returned.  Note that MPI does not guarentee that an MPI program can
       continue past an error; however, MPI implementations will attempt to continue whenever possible.

       MPI_SUCCESS
	      - No error; MPI routine completed successfully.
       MPI_ERR_ARG
	      - Invalid argument.  Some argument is invalid and is not identified by a specific error class (e.g., MPI_ERR_RANK ).
       MPI_ERR_OTHER
	      - Other error; use MPI_Error_string to get more information about this error code.

LOCATION

       pack.c

								     2/26/2011							       MPI_Pack(3)

MPI_Pack_external(3)							MPI						      MPI_Pack_external(3)

NAME

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

SYNOPSIS

       int MPI_Pack_external(char *datarep,
			    void *inbuf,
			    int incount,
			    MPI_Datatype datatype,
			    void *outbuf,
			    MPI_Aint outcount,
			    MPI_Aint *position)

INPUT PARAMETERS

       datarep
	      - data representation (string)
       inbuf  - input buffer start (choice)
       incount
	      - number of input data items (integer)
       datatype
	      - datatype of each input data item (handle)
       outcount
	      - output buffer size, in bytes (address integer)

OUTPUT PARAMETER

       outbuf - output buffer start (choice)

INPUT
/OUTPUT PARAMETER
       position
	      - current position in buffer, in bytes (address integer)

THREAD AND INTERRUPT SAFETY

       This  routine  is  thread-safe.	This means that this routine may be safely used by multiple threads without the need for any user-provided
       thread locks.  However, the routine is not interrupt safe.  Typically, this is due to the use of memory allocation routines such as  malloc
       or other non-MPICH runtime routines that are themselves not interrupt-safe.

NOTES FOR FORTRAN

       All  MPI  routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the end of the argument list.  ierr
       is an integer and has the same meaning as the return value of the routine in C.	In Fortran, MPI routines are subroutines, and are  invoked
       with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

ERRORS

       All  MPI  routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of the function and Fortran routines in
       the last argument.  Before the value is returned, the current MPI error handler is called.  By default, this error handler aborts  the  MPI
       job.   The  error  handler  may	be  changed  with  MPI_Comm_set_errhandler  (for  communicators), MPI_File_set_errhandler (for files), and
       MPI_Win_set_errhandler (for RMA windows).  The MPI-1 routine MPI_Errhandler_set may be used but its  use  is  deprecated.   The	predefined
       error handler MPI_ERRORS_RETURN may be used to cause error values to be returned.  Note that MPI does not guarentee that an MPI program can
       continue past an error; however, MPI implementations will attempt to continue whenever possible.

       MPI_SUCCESS
	      - No error; MPI routine completed successfully.
       MPI_ERR_TYPE
	      - Invalid datatype argument.  May be an uncommitted MPI_Datatype (see MPI_Type_commit ).
       MPI_ERR_ARG
	      - Invalid argument.  Some argument is invalid and is not identified by a specific error class (e.g., MPI_ERR_RANK ).
       MPI_ERR_COUNT
	      - Invalid count argument.  Count arguments must be non-negative; a count of zero is often valid.

LOCATION

       pack_external.c

								     8/2/2008						      MPI_Pack_external(3)