NAME

       MPI_Info_get - Retrieves the value associated with a key in an info object.

SYNTAX

C Syntax

       #include <mpi.h>
       int MPI_Info_get(MPI_Info info, const char *key, int valuelen, char *value, int *flag)

Fortran Syntax

       USE MPI
       ! or the older form: INCLUDE 'mpif.h'
       MPI_INFO_GET(INFO, KEY, VALUELEN, VALUE, FLAG, IERROR)
            INTEGER   INFO, VALUELEN, IERROR
            CHARACTER*(*) KEY, VALUE
            LOGICAL FLAG

Fortran 2008 Syntax

       USE mpi_f08
       MPI_Info_get(info, key, valuelen, value, flag, ierror)
            TYPE(MPI_Info), INTENT(IN) :: info
            CHARACTER(LEN=*), INTENT(IN) :: key
            INTEGER, INTENT(IN) :: valuelen
            CHARACTER(LEN=valuelen), INTENT(OUT) :: value
            LOGICAL, INTENT(OUT) :: flag
            INTEGER, OPTIONAL, INTENT(OUT) :: ierror

C++ Syntax

       #include <mpi.h>
       bool MPI::Info::Get(const char* key, int valuelen,
            char* value) const

INPUT PARAMETERS

       info      Info object (handle).

       key       Key (string).

       valuelen  Length of value arg (integer).

OUTPUT PARAMETER

       value     Value (string).

       flag      Returns true if key defined, false if not (boolean).

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       MPI_Info_get  retrieves  the value associated with key in a previous call to MPI_Info_set.
       If such a key exists, it sets flag to true and returns the value in  value;  otherwise  it
       sets  flag  to  false  and  leaves  value  unchanged. valuelen is the number of characters
       available in value. If it is less than the actual size of the value, the returned value is
       truncated.  In  C, valuelen should be one less than the amount of allocated space to allow
       for the null terminator.

       If key is larger than MPI_MAX_INFO_KEY, the call is erroneous.

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 ALSO

       MPI_Info_create
       MPI_Info_delete
       MPI_Info_dup
       MPI_Info_free
       MPI_Info_get_valuelen
       MPI_Info_get_nkeys
       MPI_Info_get_nthkey
       MPI_Info_set