GNU Radio 3.5.3.2 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2003,2005 Free Software Foundation, Inc. 00004 * 00005 * This file is part of GNU Radio 00006 * 00007 * GNU Radio is free software; you can redistribute it and/or modify 00008 * it under the terms of the GNU General Public License as published by 00009 * the Free Software Foundation; either version 3, or (at your option) 00010 * any later version. 00011 * 00012 * GNU Radio is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with GNU Radio; see the file COPYING. If not, write to 00019 * the Free Software Foundation, Inc., 51 Franklin Street, 00020 * Boston, MA 02110-1301, USA. 00021 */ 00022 00023 #ifndef _GR_VMCIRCBUF_CREATEFILEMAPPING_H_ 00024 #define _GR_VMCIRCBUF_CREATEFILEMAPPING_H_ 00025 00026 #include <gr_core_api.h> 00027 #include <gr_vmcircbuf.h> 00028 00029 #ifdef HAVE_CREATEFILEMAPPING 00030 #include <windows.h> 00031 #endif 00032 /*! 00033 * \brief concrete class to implement circular buffers with mmap and shm_open 00034 * \ingroup internal 00035 */ 00036 class GR_CORE_API gr_vmcircbuf_createfilemapping : public gr_vmcircbuf 00037 { 00038 public: 00039 // CREATORS 00040 gr_vmcircbuf_createfilemapping (int size); 00041 virtual ~gr_vmcircbuf_createfilemapping (); 00042 #ifdef HAVE_CREATEFILEMAPPING 00043 private: 00044 HANDLE d_handle; 00045 LPVOID d_first_copy; 00046 LPVOID d_second_copy; 00047 #endif 00048 }; 00049 00050 /*! 00051 * \brief concrete factory for circular buffers built using mmap and shm_open 00052 */ 00053 class GR_CORE_API gr_vmcircbuf_createfilemapping_factory : public gr_vmcircbuf_factory 00054 { 00055 private: 00056 static gr_vmcircbuf_factory *s_the_factory; 00057 00058 public: 00059 static gr_vmcircbuf_factory *singleton (); 00060 00061 virtual const char *name () const { return "gr_vmcircbuf_createfilemapping_factory"; } 00062 00063 /*! 00064 * \brief return granularity of mapping, typically equal to page size 00065 */ 00066 virtual int granularity (); 00067 00068 /*! 00069 * \brief return a gr_vmcircbuf, or 0 if unable. 00070 * 00071 * Call this to create a doubly mapped circular buffer. 00072 */ 00073 virtual gr_vmcircbuf *make (int size); 00074 }; 00075 00076 #endif /* _GR_VMCIRCBUF_CREATEFILEMAPPING_H_ */