.. highlight:: c

.. _pragma_interface_memory_variable:

Configure Global Variable as Memory Interface
------------------------------------

**Syntax**


``#pragma LEGUP interface variable(<var_name>) type(memory) num_elements(<int>)``

**Description**


This pragma specifies the memory interface type for a shared array/struct global variable.
The array size can be specified or overridden (over the declared size in C++) by specifying the ``num_elements`` option.
More details in :ref:`rtl_interface` section.

**Parameters**


+---------------------+------------+----------+---------+------------------------------------------------------------------------------------------------------+
|  Parameter          |    Type    | Optional | Default |       Description                                                                                    |
+=====================+============+==========+=========+======================================================================================================+
| ``varaible``        | String     | No       |         | Variable name                                                                                        |
+---------------------+------------+----------+---------+------------------------------------------------------------------------------------------------------+
| ``type``            | ``memory`` | No       |         | Interface type                                                                                       |
+---------------------+------------+----------+---------+------------------------------------------------------------------------------------------------------+
| ``num_elements``    | Integer    | Yes      |         | Specifies the number of elements of the variable array. Can override the array size of the variable. |
+---------------------+------------+----------+---------+------------------------------------------------------------------------------------------------------+

**Position**

Before the global variable declaration.

**Examples**


.. code-block:: c

  #pragma LEGUP interface variable(b) type(memory) num_elements(100)
  int b[100];

  int fun() {
    ...
  }

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