rfl@oddjob.uchicago.edu (Bob Loewenstein) (12/28/89)
memTop in machines other than mac+ and xl gives the amount of memory available to the application. I need to find out how much memory is available in the particular machine my application is running on. I must be missing something...Can anyone clue me in on what to do? Thanks
rfl@oddjob.uchicago.edu (Bob Loewenstein) (12/28/89)
My last question may have been confusing..I need to know how much Ram is installed in the machine. Occasionally my application interprets a variable as pointer and before accessing memory perhaps pointed to, I want to be sure that the "pointer" is pointing to a valid address.
beard@ux1.lbl.gov (Patrick C Beard) (12/28/89)
In article <6886@tank.uchicago.edu> rfl@oddjob.uchicago.edu (Bob Loewenstein) writes: > >My last question may have been confusing..I need to know how much >Ram is installed in the machine. Occasionally my application interprets >a variable as pointer and before accessing memory perhaps pointed to, I >want to be sure that the "pointer" is pointing to a valid address. Well, the safest thing to do would probably check that the pointer points to a valid address in your OWN heap, or the System heap, and all other addresses aren't safe because they point to some other application's heap. However; you might for some reason wish to find out (if your were writing a utility that does diagnostics or whatever) the extent of physical RAM. I believe that the call MFTopMem gives you the address of the highest useable byte in memory. From the MPW interfaces: pascal Ptr MFTopMem(void) = {0x3F3C,0x0016,0xA88F}; This is available on all systems beyond 6.0. ------------------------------------------------------------------------------- - Patrick Beard, Macintosh Programmer (beard@lbl.gov) - - Berkeley Systems, Inc. ".......<dead air>.......Good day!" - Paul Harvey - -------------------------------------------------------------------------------