.. _descriptor-precision-domain-get_value:

descriptor<precision, domain>::get_value
============================================

Gets the configuration value of one configuration parameter. This routine belongs to the ``oneapi::mkl::dft`` namespace.

.. contents::
    :local:
    :depth: 1

Description
***********

This function gets the configuration value of one particular configuration parameter and will throw an ``std::runtime_exception()`` in the case that it fails or an invalid configuration is provided.

Each configuration parameter is a named constant, and the configuration value must have the corresponding type, which can be a named constant or a native type. For available configuration parameters and the corresponding configuration values, see `DftiGetValue`_.


API
***

Syntax
------

.. code-block:: cpp

   namespace oneapi::mkl::dft{
     void descriptor<prec,dom>::get_value (config_param param , ...)
   }

Include Files
-------------
-  ``oneapi/mkl/dfti.hpp``


Input Parameters
----------------
.. list-table::
   :header-rows: 1

   * - Name
     - Type
     - Description
   * - param
     - enum CONFIG_PARAM
     - Configuration parameter.
   * - value_ptr
     - Depends on the configuration parameter
     - Pointer to configuration value.



.. _DftiGetValue: https://software.intel.com/content/www/us/en/develop/ documentation/onemkl-developer-reference-c/top/fourier-transform-functions/fft-functions/fft-descriptor-configuration-functions/dftigetvalue.html