newlib/libc/sys/sysvi386/sbrk.c

   1 extern end;
   2
   3 static void *curbrk = (char*)&end;
   4
   5 void *
   6 sbrk(incr)
   7 int incr; {
   8         extern int errno;
   9         extern int _brk(void *);
  10         void *ptr = curbrk;
  11         int t;
  12
  13         if (incr == 0)
  14                 return curbrk;
  15         t = _brk (curbrk + incr);
  16         if (t == -1 && errno)
  17                 return (void *)-1;
  18         curbrk = ((char *)curbrk) + incr;
  19         return ptr;
  20 }
  21