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PR_OpenAnonFileMap
==================
Creates or opens a named semaphore with the specified name
Syntax
------
.. code::
#include <prshma.h>
NSPR_API( PRFileMap *)
PR_OpenAnonFileMap(
const char *dirName,
PRSize size,
PRFileMapProtect prot
);
Parameters
~~~~~~~~~~
The function has the following parameters:
``dirName``
A pointer to a directory name that will contain the anonymous file.
``size``
The size of the shared memory.
``prot``
How the shared memory is mapped.
Returns
~~~~~~~
Pointer to :ref:`PRFileMap` or ``NULL`` on error.
Description
-----------
If the shared memory already exists, a handle is returned to that shared
memory object.
On Unix platforms, :ref:`PR_OpenAnonFileMap` uses ``dirName`` as a
directory name, without the trailing '/', to contain the anonymous file.
A filename is generated for the name.
On Windows platforms, ``dirName`` is ignored.
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