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/*
* shm_memory_tool.h: Define the alloc interface for shared memory
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
*
* Copyright (C) 2003 Sven Goethel, <sven@jausoft.com>
*/
#ifndef SHM_MEMORY_TOOL_H
#define SHM_MEMORY_TOOL_H
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <vdr/tools.h>
class PointerShmFdListObject : public cListObject {
private:
const int shmfd;
char * name;
void * ptr;
const size_t sz;
typedef const PointerShmFdListObject * const pShmObj;
public:
PointerShmFdListObject(const PointerShmFdListObject &v)
: cListObject(), shmfd(v.shmfd), name(NULL), ptr(v.ptr), sz(v.sz)
{ name = strdup(v.name); }
PointerShmFdListObject(int fd, const char * fname, void * memptr, const size_t size)
: cListObject(), shmfd(fd), name(NULL), ptr(memptr), sz(size)
{ name = strdup(fname); }
~PointerShmFdListObject() { if (name) free(name); }
void * getPtr () const { return ptr; }
const size_t getSize() const { return sz; }
const int getFd () const { return shmfd; }
const char * getFileName() const { return name; }
virtual bool operator == (const cListObject & ListObject ) const
{
pShmObj tmp = dynamic_cast<pShmObj>(&ListObject);
return tmp && (ptr == tmp->ptr) && (shmfd == tmp->shmfd);
}
virtual bool operator < (const cListObject & ListObject)
{
pShmObj tmp = dynamic_cast<pShmObj>(&ListObject);
return tmp && (shmfd < tmp->shmfd);
}
virtual bool operator > (const cListObject & ListObject) const
{
pShmObj tmp = dynamic_cast<pShmObj>(&ListObject);
return tmp && (shmfd > tmp->shmfd);
}
operator int () const { return name ? shmfd : -1; }
operator const void * () const { return name ? ptr : NULL; }
};
extern void * shm_malloc (size_t size);
extern void * shm_malloc (size_t size, int flags);
extern void shm_free (void * memptr);
extern PointerShmFdListObject * shm_find (void * memptr);
#endif
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