MPI_Comm_free(3OpenMPI) MPI_Comm_free(3OpenMPI)
NAME
MPI_Comm_free - Mark a communicator object for deallocation.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Comm_free(MPI_Comm *comm)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_COMM_FREE(COMM, IERROR)
INTEGER COMM, IERROR
C++ Syntax
#include <mpi.h>
void Comm::Free()
INPUT PARAMETER
comm Communicator to be destroyed (handle).
OUTPUT PARAMETER
IERROR Fortran only: Error status (integer).
DESCRIPTION
This operation marks the communicator object for deallocation. The handle is set to MPI_COMM_NULL. Any pending operations that use this
communicator will complete normally; the object is actually deallocated only if there are no other active references to it. This call
applies to intracommunicators and intercommunicators. Upon actual deallocation, the delete callback functions for all cached attributes
(see Section 5.7 in the MPI-1 Standard, "Caching") are called in arbitrary order.
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.
Open MPI 1.2 September 2006 MPI_Comm_free(3OpenMPI)
