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/* -*- c++ -*- */
/*
* Copyright 2003,2005 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef _GR_VMCIRCBUF_CREATEFILEMAPPING_H_
#define _GR_VMCIRCBUF_CREATEFILEMAPPING_H_
#include <gr_runtime_api.h>
#include <gr_vmcircbuf.h>
#ifdef HAVE_CREATEFILEMAPPING
#include <windows.h>
#endif
/*!
* \brief concrete class to implement circular buffers with mmap and shm_open
* \ingroup internal
*/
class GR_RUNTIME_API gr_vmcircbuf_createfilemapping : public gr_vmcircbuf
{
public:
// CREATORS
gr_vmcircbuf_createfilemapping (int size);
virtual ~gr_vmcircbuf_createfilemapping ();
#ifdef HAVE_CREATEFILEMAPPING
private:
HANDLE d_handle;
LPVOID d_first_copy;
LPVOID d_second_copy;
#endif
};
/*!
* \brief concrete factory for circular buffers built using mmap and shm_open
*/
class GR_RUNTIME_API gr_vmcircbuf_createfilemapping_factory : public gr_vmcircbuf_factory
{
private:
static gr_vmcircbuf_factory *s_the_factory;
public:
static gr_vmcircbuf_factory *singleton ();
virtual const char *name () const { return "gr_vmcircbuf_createfilemapping_factory"; }
/*!
* \brief return granularity of mapping, typically equal to page size
*/
virtual int granularity ();
/*!
* \brief return a gr_vmcircbuf, or 0 if unable.
*
* Call this to create a doubly mapped circular buffer.
*/
virtual gr_vmcircbuf *make (int size);
};
#endif /* _GR_VMCIRCBUF_CREATEFILEMAPPING_H_ */
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