root / gnuradio-core / src / lib / runtime / gr_vmcircbuf_mmap_shm_open.h @ cda71d95
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| 1 | /* -*- c++ -*- */
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|---|---|
| 2 | /*
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| 3 | * Copyright 2003 Free Software Foundation, Inc. |
| 4 | * |
| 5 | * This file is part of GNU Radio |
| 6 | * |
| 7 | * GNU Radio is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 3, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | * GNU Radio is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with GNU Radio; see the file COPYING. If not, write to |
| 19 | * the Free Software Foundation, Inc., 51 Franklin Street, |
| 20 | * Boston, MA 02110-1301, USA. |
| 21 | */ |
| 22 | |
| 23 | #ifndef _GR_VMCIRCBUF_MMAP_SHM_OPEN_H_
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| 24 | #define _GR_VMCIRCBUF_MMAP_SHM_OPEN_H_
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| 25 | |
| 26 | #include <gr_vmcircbuf.h> |
| 27 | |
| 28 | /*!
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| 29 | * \brief concrete class to implement circular buffers with mmap and shm_open |
| 30 | * \ingroup base |
| 31 | */ |
| 32 | class gr_vmcircbuf_mmap_shm_open : public gr_vmcircbuf {
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| 33 | public:
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| 34 | |
| 35 | // CREATORS
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| 36 | |
| 37 | gr_vmcircbuf_mmap_shm_open (int size);
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| 38 | virtual ~gr_vmcircbuf_mmap_shm_open (); |
| 39 | }; |
| 40 | |
| 41 | /*!
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| 42 | * \brief concrete factory for circular buffers built using mmap and shm_open |
| 43 | */ |
| 44 | class gr_vmcircbuf_mmap_shm_open_factory : public gr_vmcircbuf_factory {
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| 45 | private:
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| 46 | static gr_vmcircbuf_factory *s_the_factory;
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| 47 | |
| 48 | public:
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| 49 | static gr_vmcircbuf_factory *singleton ();
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| 50 | |
| 51 | virtual const char *name () const { return "gr_vmcircbuf_mmap_shm_open_factory"; } |
| 52 | |
| 53 | /*!
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| 54 | * \brief return granularity of mapping, typically equal to page size |
| 55 | */ |
| 56 | virtual int granularity ();
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| 57 | |
| 58 | /*!
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| 59 | * \brief return a gr_vmcircbuf, or 0 if unable. |
| 60 | * |
| 61 | * Call this to create a doubly mapped circular buffer. |
| 62 | */ |
| 63 | virtual gr_vmcircbuf *make (int size);
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| 64 | }; |
| 65 | |
| 66 | #endif /* _GR_VMCIRCBUF_MMAP_SHM_OPEN_H_ */ |