Re: Blocks in render callbacks
Re: Blocks in render callbacks
- Subject: Re: Blocks in render callbacks
- From: Mark Pauley <email@hidden>
- Date: Tue, 01 May 2012 14:09:44 -0700
I believe you only have to worry about the obj-c layout of the object when you call Block_copy and Block_release or when you send obj-c messages to the block.
Novocaine (3rd party framework) uses blocks from the audio callback with no problems as far as I know.
On May 1, 2012, at 1:38 PM, "Stephen F. Booth" <email@hidden> wrote:
>>> I know that it is not safe to use the dispatch_* family of functions inside a render callback because they can allocate memory (http://lists.apple.com/archives/coreaudio-api/2011/Jun/msg00141.html). However, is it acceptable to call a copied block from within a render callback? Assuming the code within the block doesn't block the thread, allocate memory, call objective-c code or do any of the other "bad" things, is there anything inherent in the block calling mechanism itself that would preclude its use?
>>
>> I don't believe so. A block invocation is just an indirect function call.
>
> That is my hope, but since in Objective-C a block is an actual object
> with an isa pointer I was concerned that there could be some
> behind-the-scenes magic going on.
>
> Stephen
>
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