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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 "variety.h"
  34. #include <stddef.h>
  35. #include <stdlib.h>
  36. #include <errno.h>
  37. #include <dos.h>
  38. #include "kolibri.h"
  39.  
  40. void* user_alloc(unsigned size);
  41.  
  42. extern  unsigned                _curbrk;
  43. extern  unsigned                _STACKTOP;
  44.  
  45. _WCRTLINK void _WCNEAR *sbrk( int increment )
  46. {
  47.   if( increment > 0 )
  48.   {
  49.     void* p;
  50.  
  51.     increment = ( increment + 0x0fff ) & ~0x0fff;
  52.     //p = LocalAlloc( LMEM_FIXED, increment );
  53.     //p = VirtualAlloc(NULL, increment, MEM_COMMIT,PAGE_EXECUTE_READWRITE);
  54.     p = user_alloc(increment);
  55.     if( p != NULL ) return( p );
  56.      errno = ENOMEM;
  57.   }
  58.   else
  59.   {
  60.     errno = EINVAL;
  61.   }
  62.   return( (void *) -1 );
  63. }
  64.