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  1. /****************************************************************************
  2. *
  3. *                            Open Watcom Project
  4. *
  5. *    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
  6. *
  7. *  ========================================================================
  8. *
  9. *    This file contains Original Code and/or Modifications of Original
  10. *    Code as defined in and that are subject to the Sybase Open Watcom
  11. *    Public License version 1.0 (the 'License'). You may not use this file
  12. *    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
  13. *    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
  14. *    provided with the Original Code and Modifications, and is also
  15. *    available at www.sybase.com/developer/opensource.
  16. *
  17. *    The Original Code and all software distributed under the License are
  18. *    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  19. *    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
  20. *    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
  21. *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
  22. *    NON-INFRINGEMENT. Please see the License for the specific language
  23. *    governing rights and limitations under the License.
  24. *
  25. *  ========================================================================
  26. *
  27. * Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
  28. *               DESCRIBE IT HERE!
  29. *
  30. ****************************************************************************/
  31.  
  32.  
  33. //#include "dll.h"        // needs to be first
  34. #include "variety.h"
  35. #include <stddef.h>
  36. #include <malloc.h>
  37. #include "heap.h"
  38. #include "heapacc.h"
  39.  
  40. /* return the number of times that _nmalloc can be called to allocate
  41.    and item "size" bytes from the near heap. */
  42.  
  43. _WCRTLINK unsigned int _freect( size_t size )
  44.     {
  45.         unsigned int count;
  46.         size_t memsize;
  47.         size_t size_of_chunk;
  48.         frlptr pnext;
  49.         mheapptr mhp;
  50.  
  51.         count = 0;
  52.         size_of_chunk = (size + TAG_SIZE + ROUND_SIZE) & ~ROUND_SIZE;
  53.         if( size_of_chunk < size )  return( 0 );
  54.         if( size_of_chunk < FRL_SIZE ) {
  55.             size_of_chunk = FRL_SIZE;
  56.         }
  57.         _AccessNHeap();
  58.         for( mhp = __nheapbeg; mhp != NULL; mhp = mhp->next ) {
  59.             pnext = mhp->freehead.next;
  60.             while( pnext != (frlptr) &mhp->freehead ) {
  61.                 memsize = pnext->len;
  62.                 count += memsize / size_of_chunk;
  63.                 pnext = pnext->next;
  64.             }
  65.         }
  66.         _ReleaseNHeap();
  67.         return( count );
  68.     }
  69.