NAME
MPI_Unpublish_name - Unpublishes a service name
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Unpublish_name(char *service_name, MPI_Info info,
char *port_name)
Fortran Syntax
INCLUDE ’mpif.h’
MPI_UNPUBLISH_NAME(SERVICE_NAME, INFO, PORT_NAME, IERROR)
CHARACTER*(*) SERVICE_NAME, PORT_NAME
INTEGER INFO, IERROR
C++ Syntax
#include <mpi.h>
void MPI::Unpublish_name(const char* service_name, const MPI::Info& info,
char* port_name)
INPUT PARAMETERS
service_name A service name (string).
info Options to the name service functions (handle).
port_name A port name (string).
OUTPUT PARAMETER
IERROR Fortran only: Error status (integer).
DESCRIPTION
This routine removes the pair (service_name, port_name) so that
applications may no longer retrieve port_name by calling
MPI_Lookup_name. It is an error to unpublish a service_name that was
not published via MPI_Publish_name. Both the service_name and port_name
arguments to MPI_Unpublish_name must be identical to the arguments to
the previous call to MPI_Publish_name.
INFO ARGUMENTS
The following keys for info are recognized:
Key Type Description
--- ---- -----------
ompi_global_scope bool If set to true, unpublish the name from
the global scope. Unpublish from the local
scope otherwise. See the NAME SCOPE
section for more details.
bool info keys are actually strings but are evaluated as follows: if
the string value is a number, it is converted to an integer and cast to
a boolean (meaning that zero integers are false and non-zero values are
true). If the string value is (case-insensitive) "yes" or "true", the
boolean is true. If the string value is (case-insensitive) "no" or
"false", the boolean is false. All other string values are
unrecognized, and therefore false.
If no info key is provided, the function will first check to see if a
global server has been specified and is available. If so, then the
unpublish function will default to global scope first, followed by
local. Otherwise, the data will default to unpublish with local scope.
NAME SCOPE
Open MPI supports two name scopes: global and local. Local scope values
are placed in a data store located on the mpirun of the calling
process’ job, while global scope values reside on a central server.
Calls to MPI_Unpublish_name must correctly specify the scope to be used
in finding the value to be removed. The function will return an error
if the specified service name is not found on the indicated location.
For a more detailed description of scoping rules, please see the
MPI_Publish_name man page.
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++
functions 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.
See the MPI man page for a full list of MPI error codes.
SEE ALSO
MPI_Publish_name
MPI_Lookup_name
MPI_Open_port