PRODUCT  :  Borland C++                            NUMBER  :  735
  VERSION  :  2.0
       OS  :  DOS
     DATE  :  October 19, 1993                         PAGE  :  1/2

    TITLE  :  Determining Program Size




  /**********************************************************************

  The size of a program cannot be determined statically because the
  the  stack and near heap are sized dynamically at run time.  The
  load size  specified in the EXE header is incorrect for this
  reason.  The only way  to accurately determine the program image
  size is to check it at run time.

  This program will get the current size of the program image in
  memory. This size will change dynamically as the program acquires
  memory from and releases memory to DOS.  This in formation is
  stored in the Memory Control Block (MCB).  The MCB begins one
  paragraph (16 bytes) before the Program Segment Prefix (PSP).
  The current program size is stored at offset 0x3 from the
  beginning of the MCB.  Offset 0x3 represents the size in
  paragraphs therefore it must be multiplied by 16 to obtain the
  size in bytes.


  WRITTEN BY
       Jerry Shockley      9/19/91

  **********************************************************************/
  #include <dos.h>

  unsigned _stklen = 63000u;  //This size can be changed to see the
  size
                              // size change.

  void main()
  {
     unsigned far *size;

     size = MK_FP( _psp - 1, 0x03 );
     printf("\nSize of program in memory = %l0u", (unsigned long)
  (*size) * 16 );
  }



















  PRODUCT  :  Borland C++                            NUMBER  :  735
  VERSION  :  2.0
       OS  :  DOS
     DATE  :  October 19, 1993                         PAGE  :  2/2

    TITLE  :  Determining Program Size




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