3 * Copyright 2003 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
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)
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.
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.
23 #ifndef _GR_VMCIRCBUF_SYSV_SHM_H_
24 #define _GR_VMCIRCBUF_SYSV_SHM_H_
26 #include <gr_vmcircbuf.h>
29 * \brief concrete class to implement circular buffers with mmap and shm_open
32 class gr_vmcircbuf_sysv_shm : public gr_vmcircbuf {
37 gr_vmcircbuf_sysv_shm (int size);
38 virtual ~gr_vmcircbuf_sysv_shm ();
42 * \brief concrete factory for circular buffers built using mmap and shm_open
44 class gr_vmcircbuf_sysv_shm_factory : public gr_vmcircbuf_factory {
46 static gr_vmcircbuf_factory *s_the_factory;
49 static gr_vmcircbuf_factory *singleton ();
51 virtual const char *name () const { return "gr_vmcircbuf_sysv_shm_factory"; }
54 * \brief return granularity of mapping, typically equal to page size
56 virtual int granularity ();
59 * \brief return a gr_vmcircbuf, or 0 if unable.
61 * Call this to create a doubly mapped circular buffer.
63 virtual gr_vmcircbuf *make (int size);
66 #endif /* _GR_VMCIRCBUF_SYSV_SHM_H_ */