[Rtk-cvs] rtk/src/core/platform/linux Mmap.cpp,NONE,1.1

[Dejan L. <de...@us...>]

Update of /cvsroot/rtk/rtk/src/core/platform/linux
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv28961/src/core/platform/linux

Added Files:
	Mmap.cpp 
Log Message:
Mmap.cpp added to /src/core/platform/linux

--- NEW FILE: Mmap.cpp ---
/**
  * 
  * RTK
  * Fast and easy cross-platform GUI ToolKit.
  * 
  * Copyright (C) 2001-200x RTK Development Team
  * 
  * This library is free software; you can redistribute it and/or modify it 
  * under the terms of the slightly modified (see the "EXCEPTION NOTICE" part 
  * of RTK Library License) GNU Lesser General Public License as published 
  * by the Free Software Foundation; either version 2.1 of the License, or 
  * (at your option) any later version.
  * 
  * This library 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 Lesser General Public 
  * License for more details.
  * 
  * You should have received a copy of the GNU Lesser General Public License
  * and along with this library; if not, write to the 
  * Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA .
  * 
  * Also you should have received a copy of RTK Library License, if not please
  * write an e-mail to some of RTK authors (listed in file AUTHORS).
  *
  * Bug reports: bu...@rt...
  * Suggestions: rf...@rt...
  ***************************************************************************/
  
/**
  * $Source: /cvsroot/rtk/rtk/src/core/platform/linux/Mmap.cpp,v $
  *****
  * Authors (chronological order):
  *   Dejan Lekic, de...@nu... (dejan§rtk.cx)
  * Contributors (chronological order):
  *   $fname $lname, $email
  *****
  * T0D0 List:
  * -
  ***************************************************************************/
  
#include <rtk/Mmap.h>

namespace Rtk
{

Mmap::Mmap()
{
	_file_opened = false;
    _filename = 0;
    _len = 0;
    _fd = -1;
    _prot = PROT_READ|PROT_WRITE;
    _shared = MAP_SHARED;
    _mmapAddress = (caddr_t) -1;
} // Mmap() constructor

Mmap::Mmap(const String& fname, bool bc)
{
    if (SetFilename(fname.c_str(), bc))
		_file_opened = true;
	else
		_file_opened = false;

    _len = 0;
    _fd = -1;
    _prot = PROT_READ|PROT_WRITE;
    _shared = MAP_SHARED;
    _mmapAddress = (caddr_t) -1;
} // Mmap() constructor

Mmap::~Mmap()
{
    // free filename
    if (_filename)
		delete _filename;
    
    // close file
    if (_fd >= 0)
		close(_fd);
    
    // unmap file
    if (_mmap_address)
		munmap(_mmap_address, _len);
} // ~Mmap() destructor

bool Mmap::SetFilename(const char *filename, bool create)
{
    int len = strlen(filename)+1;
    _filename = new RCHAR [len];
    strcpy(_filename, filename);
    struct stat statbuf;
    if (!create) {
		_fd = open(_filename, O_RDWR) ;
    } else {
		_fd = open(_filename, O_RDWR|O_CREAT, 00600);
    }
    // Return -1 as result if opening went wrong
    if (_fd < 0)
        return false;        
    int rc = stat(_filename, &statbuf);
    if (rc < 0) {
        return false;
    }
    _len = (size_t) statbuf.st_size;        
    return true;
} // SetFilename()

void Mmap::SetSize(uint size)
{
    if (_len != size)
    {
        lseek(_fd, (off_t) size, SEEK_SET);
        write(_fd, "", 1);
        ftruncate(_fd, size);
    }
    _len = size;
}

    
void* Mmap::Map()
{
    _mmap_address = (void*)mmap(0, _len, _prot, _shared, _fd, 0);
    
    return _mmap_address;
} // Map()

void Mmap::Bzero()
{
    if (_mmap_address != (void*)-1)
		memset(_mmap_address, 0, _len);
} // Bzero()

}; // Rtk

/**
  * $Id: Mmap.cpp,v 1.1 2004/04/20 18:54:00 dejan Exp $
  ***************************************************************************/