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+PR_GetDescType
+==============
+
+Describes what type of file is referenced by a specified file
+descriptor.
+
+
+Syntax
+------
+
+.. code::
+
+   #include <prio.h>
+
+   PRDescType PR_GetDescType(PRFileDesc *file);
+
+
+Parameter
+~~~~~~~~~
+
+The function has the following parameter:
+
+``file``
+   A pointer to a :ref:`PRFileDesc` object whose descriptor type is to be
+   returned.
+
+
+Returns
+~~~~~~~
+
+The function returns a ``PRDescType`` enumeration constant that
+describes the type of file.
+
+
+Description
+-----------
+
+The ``PRDescType`` enumeration is defined as follows:
+
+.. code::
+
+   typedef enum PRDescType {
+     PR_DESC_FILE       = 1,
+     PR_DESC_SOCKET_TCP = 2,
+     PR_DESC_SOCKET_UDP = 3,
+     PR_DESC_LAYERED    = 4
+   } PRDescType;
+
+The enumeration has the following enumerators:
+
+``PR_DESC_FILE``
+   The :ref:`PRFileDesc` object represents a normal file.
+``PR_DESC_SOCKET_TCP``
+   The :ref:`PRFileDesc` object represents a TCP socket.
+``PR_DESC_SOCKET_UDP``
+   The :ref:`PRFileDesc` object represents a UDP socket.
+``PR_DESC_LAYERED``
+   The :ref:`PRFileDesc` object is a layered file descriptor.