Re: memcpy with 64 bit
Re: memcpy with 64 bit
- Subject: Re: memcpy with 64 bit
- From: "gMail.com" <email@hidden>
- Date: Tue, 15 Dec 2009 15:33:47 +0100
- Thread-topic: memcpy with 64 bit
Thanks,
I have just read that doc
http://developer.apple.com/mac/library/documentation/Performance/Conceptual/
ManagingMemory/Articles/MemoryAlloc.html
So it seems I can really calloc e.g. 60MB with calloc. Can you confirm?
If not, I could use NSMutableData. If so, could I get the pointer with this?
imageBase = [data bytes];
If I use calloc, then when I call free(ptr) does the memory get release
immediately? Or does it behave as I call [data release]; ?
--
Leo
> Da: Ken Thomases <email@hidden>
> Data: Tue, 15 Dec 2009 04:50:07 -0600
> A: "gMail.com" <email@hidden>
> Cc: <email@hidden>
> Oggetto: Re: memcpy with 64 bit
>
> On Dec 15, 2009, at 2:50 AM, gMail.com wrote:
>
>>> Da: Andrew Farmer <email@hidden>
>>> Data: Mon, 14 Dec 2009 20:17:41 -0800
>>>
>>> On 14 Dec 2009, at 11:06, gMail.com wrote:
>>>> Handle imagesH = NewHandleClear(totImages * oneImageSize);
>>>
>>> Wait, Handle? NewHandleClear? Your use of these functions suggests
>>> that you
>>> may be working from a dangerously old textbook. There's really no
>>> reason to
>>> use them in new code.
>>
>> Ouch! That's my old code. But it works on
>> 64-bit Intel, Base SDK 10.6, x86_64, GCC 4.2, Target Mac OS X 10.6
>> I need an handle to store image bitmap data for later reuse by the
>> OpenGL
>> API "glTexImage2D". Do you know a better way?
>
> There's no good reason why it has to be a handle. Use an
> NSMutableData or even just malloc a chunk of the heap.
>
> Handles have an unnecessary level of indirection. Back in the day,
> that came with relocatability, but it doesn't anymore. It's just
> obscure and excessively complicated.
>
> Regards,
> Ken
>
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden