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+PRFileMap
+=========
+
+Type returned by :ref:`PR_CreateFileMap` and passed to :ref:`PR_MemMap` and
+:ref:`PR_CloseFileMap`.
+
+
+Syntax
+------
+
+.. code::
+
+ #include <prio.h>
+
+ typedef struct PRFileMap PRFileMap;
+
+
+Description
+-----------
+
+The opaque structure :ref:`PRFileMap` represents a memory-mapped file
+object. Before actually mapping a file to memory, you must create a
+memory-mapped file object by calling :ref:`PR_CreateFileMap`, which returns
+a pointer to :ref:`PRFileMap`. Then sections of the file can be mapped into
+memory by passing the :ref:`PRFileMap` pointer to :ref:`PR_MemMap`. The
+memory-mapped file object is closed by passing the :ref:`PRFileMap` pointer
+to :ref:`PR_CloseFileMap`.