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Re: Garbage collector vs variable lifetime
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Re: Garbage collector vs variable lifetime


  • Subject: Re: Garbage collector vs variable lifetime
  • From: "Hamish Allan" <email@hidden>
  • Date: Sat, 7 Jun 2008 13:35:40 +0100

On Sat, Jun 7, 2008 at 12:42 AM, Bill Bumgarner <email@hidden> wrote:

> The easiest way to do this is to simply to use data once after the for()
> loop:
>
>        NSData* data = <get it from somewhere>;
>        const unsigned char* bytes = [data bytes];
>        NSUInteger count = [data length];
>        for (NSUInteger i = 0; i < count; i++)
>                something = bytes [i];
>        [data self];

What about using the __strong modifier? The compiler surely won't
consider "bytes" to be collectable until after the loop.

        NSData* data = <get it from somewhere>;
        __strong const unsigned char* bytes = [data bytes];
        NSUInteger count = [data length];
        for (NSUInteger i = 0; i < count; i++)
                something = bytes [i];

Hamish
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References: 
 >Garbage collector vs variable lifetime (From: Quincey Morris <email@hidden>)
 >Re: Garbage collector vs variable lifetime (From: Bill Bumgarner <email@hidden>)
 >Re: Garbage collector vs variable lifetime (From: Ricky Sharp <email@hidden>)
 >Re: Garbage collector vs variable lifetime (From: Bill Bumgarner <email@hidden>)

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