bump On Mon, 18 Oct 2021 at 23:58, zack leung <zakthertems...@gmail.com> wrote:
> bump > > > On Sat, 25 Sept 2021 at 00:26, zack leung <zakthertems...@gmail.com> > wrote: > >> bump >> >> On Thu, 9 Sept 2021 at 02:17, zack leung <zakthertems...@gmail.com> >> wrote: >> >>> >Thanks! I guess i'm really unsure about how the pointer relates to the >>> amount of memory that you can use. I assume the Malloc keeps track of the >>> sections being used in the heap. Does this function Allocate 2 blocks since >>> the pointer is set to >>> >>> (uintptr_t) next_block + HEAP_ALLOC_BONUS - alloc_begin; >>> >>> >(I know it's a bit naive to assume this given my first question) >>> >>> think the method is _Heap_Size_of_alloc_area. It may need a wrapper >>> added to the protected heap wrapper for safety. I don't know if it has one. >>> It should be the equivalent functionality. >>> > How would i implement a wrapper and what safety measures need to be >>> implemented. So far it's checking if : the block is not in the heap and if >>> it's been previously used. Is the usable memory in the heap calculated by: >>> the size of the block * # of blocks? >>> >>> Thanks, Zack >>> >>> ---------- Forwarded message --------- >>> From: Joel Sherrill <j...@rtems.org> >>> Date: Wed, 8 Sept 2021 at 20:30 >>> Subject: Re: Ticket 4503 >>> To: Gedare Bloom <ged...@rtems.org> >>> Cc: zack leung <zakthertems...@gmail.com>, rtems-de...@rtems.org < >>> devel@rtems.org> >>> >>> >>> >>> >>> On Wed, Sep 8, 2021 at 11:02 AM Gedare Bloom <ged...@rtems.org> wrote: >>> >>>> Hi Zack, >>>> >>>> https://devel.rtems.org/ticket/4503 >>>> >>>> The malloc implementation exists in the score as the Heap Manager. >>>> search for "Heap_" within cpukit to get some ideas where to look. >>>> >>> >>> I think the method is _Heap_Size_of_alloc_area. It may need a wrapper >>> added to the protected heap wrapper for safety. I don't know if it has one. >>> It should be the equivalent functionality. >>> >>> newlib's malloc.h will need looking at to make sure we provide the right >>> methods. >>> >>> >>> >>>> >>>> @Joel are these two tickets duplicates? >>>> https://devel.rtems.org/ticket/4503 >>>> https://devel.rtems.org/ticket/4271 >>>> >>> >>> Yes. Closed #4271 and merged comments. >>> >>> --joel >>> >>> >>>> >>>> >>>> -Gedare >>>> >>>> On Tue, Sep 7, 2021 at 7:14 PM zack leung <zakthertems...@gmail.com> >>>> wrote: >>>> >>>>> I was wondering about ticket 4503. I was wondering where The required >>>>> functionality should be in the underlying score/ capability used can be >>>>> found to write this function. Also how does this relate to >>>>> >>>>> Add common malloc family extension method malloc_usable_size() >>>>> <https://devel.rtems.org/ticket/4271>? >>>>> Thanks >>>>> Zack >>>>> _______________________________________________ >>>>> devel mailing list >>>>> devel@rtems.org >>>>> http://lists.rtems.org/mailman/listinfo/devel >>>> >>>> _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel