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/* -*- c++ -*- */
/*
* Copyright 2003,2005,2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef GR_VMCIRCBUF_CREATEFILEMAPPING_H
#define GR_VMCIRCBUF_CREATEFILEMAPPING_H
#include "vmcircbuf.h"
#include <gnuradio/api.h>
#ifdef HAVE_CREATEFILEMAPPING
#include <windows.h>
#endif
namespace gr {
/*!
* \brief concrete class to implement circular buffers with mmap and shm_open
* \ingroup internal
*/
class GR_RUNTIME_API vmcircbuf_createfilemapping : public gr::vmcircbuf
{
public:
// CREATORS
vmcircbuf_createfilemapping(int size);
~vmcircbuf_createfilemapping() override;
#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 vmcircbuf_createfilemapping_factory : public gr::vmcircbuf_factory
{
private:
static gr::vmcircbuf_factory* s_the_factory;
public:
static gr::vmcircbuf_factory* singleton();
const char* name() const override
{
return "gr::vmcircbuf_createfilemapping_factory";
}
/*!
* \brief return granularity of mapping, typically equal to page size
*/
int granularity() override;
/*!
* \brief return a gr::vmcircbuf, or 0 if unable.
*
* Call this to create a doubly mapped circular buffer.
*/
gr::vmcircbuf* make(int size) override;
};
} /* namespace gr */
#endif /* GR_VMCIRCBUF_CREATEFILEMAPPING_H */
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