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From: "Artur Pendzich" <apendzich AT wytnijplusnet DOT pl>
Newsgroups: comp.os.msdos.djgpp
Subject: unload_datafile()
Date: Wed, 22 Sep 2004 11:02:26 +0200
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

HI!

I have problem with freeing memory in my program.

This is a piece of my programm.

void unload_all(void)
{
   unload_datafile(datafile)
   if (game1)
   {
      free(cards);
      free(table);
      unload_datafile(wondata);
      destroy_bitmap(bmp1);
      destroy_bitmap(bmp2);
   }
   else
   {
      unload_datafile(supdata);
      destroy_bitmap(belt1);
      destroy_bitmap(belt2);
   }
   destroy_bitmap(bmp_auto);
}
(...)

int client_reaction(void)
{
  ...
  switch(a)
{
     ...
     case KEY_Z:
      {
             physmem1 = _go32_dpmi_remaining_physical_memory();
             virtmem1 = _go32_dpmi_remaining_virtual_memory();
             unload_all();
             physmem2 = _go32_dpmi_remaining_physical_memory();
             virtmem2 = _go32_dpmi_remaining_virtual_memory();
      }
...
}

After calling function unload_all() variables physmemx and virtmemx shows  
that there is the same amount of reamining memory. Why?
I load several datafiles, create some bitmaps and then unload them from  
memory using unload_all. After it I load next set of datafiles and   
bitmaps and once again unload them.
After several loops I have not enought memory to load datafile and in  
finction  load_datafile() program freezes.
Where is the problem? What am I doing wrong?
PLaease, help me.

Artur Pendzich