> MemPtrNew() allocates a non-moveable chunk. It's stuck in one place in > memory and can't be moved to make room for other allocations that may > occur. Not really a good thing if you're allocating memory to hang onto > for a while.
It's a good thing if you are going to have the memory locked the entire time you are hanging on to the chunk. Allocating a chunk via pointer allocates the chunk at the opposite end of the heap that allocating via a handle does. So if you use MemPtrNew you don't have a locked chunk in the way when the OS tries to clean up the heap. Matt Henry www.Iliumsoft.com "Brian Smith" <[EMAIL PROTECTED]> wrote in message news:92592@palm-dev-forum... > > On Wed, 31 Jul 2002, Syed Najeebullah Hussaini wrote: > > > May i know whats the difference in between Movable and Non Movable Chunk > > in a Dynamic heap. In what situations, can one use this Chunks > > MemPtrNew() allocates a non-moveable chunk. It's stuck in one place in > memory and can't be moved to make room for other allocations that may > occur. Not really a good thing if you're allocating memory to hang onto > for a while. > > MemHandlePtr() allocates a moveable chunk and returns a handle. When you > need to access it, you lock it and unlock it. Locking it temporarily > makes it non-moveable and returns a pointer that you can use the access > the memory. Otherwise, the OS is free to move the chunk around as needed > to satisfy other allocation requests. > > ----------------------------------------------------------------------- > Brian Smith // avalon73 at arthurian dot nu // http://www.arthurian.nu/ > Software Developer // Gamer // Webmaster // System Administrator > "Senate, n.: A body of elderly gentlemen charged with high duties and > misdemeanors." -- Ambrose Bierce > > > > -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
