MPI_Type_free(3) Open MPI MPI_Type_free(3)NAMEMPI_Type_free - Frees a data type.
SYNTAXC Syntax
#include <mpi.h>
int MPI_Type_free(MPI_Datatype *datatype)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_TYPE_FREE(DATATYPE, IERROR)
INTEGER DATATYPE, IERROR
C++ Syntax
#include <mpi.h>
void Datatype::Free()INPUT/OUTPUT PARAMETER
datatype Datatype that is freed (handle).
OUTPUT PARAMETER
IERROR Fortran only: Error status (integer).
DESCRIPTION
Marks the datatype object associated with datatype for de-allocation
and sets datatype to MPI_DATATYPE_NULL. Any communication that is cur‐
rently using this datatype will complete normally. Derived datatypes
that were defined from the freed datatype are not affected.
Freeing a datatype does not affect any other datatype that was built
from the freed datatype. The system behaves as if input datatype argu‐
ments to derived datatype constructors are passed by value.
ERRORS
Almost all MPI routines return an error value; C routines as the value
of the function and Fortran routines in the last argument. C++ func‐
tions do not return errors. If the default error handler is set to
MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
will be used to throw an MPI::Exception object.
Before the error value is returned, the current MPI error handler is
called. By default, this error handler aborts the MPI job, except for
I/O function errors. The error handler may be changed with
MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN
may be used to cause error values to be returned. Note that MPI does
not guarantee that an MPI program can continue past an error.
1.7.4 Feb 04, 2014 MPI_Type_free(3)
