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MPI_Info_get_valuelen - Retrieves the length of the key value associated
with an info object.
#include <mpi.h>
int MPI_Info_get_valuelen(MPI_Info info, const char *key,
int *valuelen, int *flag)
INCLUDE ’mpif.h’
MPI_INFO_GET_VALUELEN(INFO, KEY, VALUELEN, FLAG, IERROR)
INTEGER INFO, VALUELEN, IERROR
LOGICAL FLAG
CHARACTER*(*) KEY
#include <mpi.h>
bool MPI::Info::Get_valuelen(const char* key, int& valuelen)
const
- info
- Info object (handle).
- key
- Key (string).
- valuelen
- Length of value arg (integer).
- flag
- Returns true if key defined, false if
not (boolean).
- IERROR
- Fortran only: Error status (integer).
MPI_Info_get_valuelen
retrieves the length of the value associated with key. If key is defined,
valuelen is set to the length of its associated value and flag is set to
true. If key is not defined, valuelen is not touched and flag is set to
false. The length returned in C or C++ does not include the end-of-string
character.
If key is larger than MPI_MAX_INFO_KEY, the call is erroneous.
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.
MPI_Info_get
MPI_Info_get_nkeys
MPI_Info_get_nthkey
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