If you use convenience methods (as in the else branch) it is autoreleased.
See here for details:
http://developer.apple.com/documentation/Cocoa/Conceptual/MemoryMgmt/Concepts/ObjectOwnership.html#//apple_ref/doc/uid/20000043
On Thu, Mar 13, 2008 at 8:19 AM, Daniel Luis dos Santos <
[EMAIL PROTECTED]> wrote:
> Hello,
>
> I have the following code :
>
> if (![fileMgr fileExistsAtPath: indexFilePath]) {
> NSMutableDictionary *index = [[NSMutableDictionary alloc]
> init];
> [index setObject: [NSNumber numberWithLong:
> DEFAULTS_BLOCKSIZE]
> forKey: INDEXKEY_BLOCKSIZE];
> [index setObject: [NSNumber numberWithLong:
> DEFAULTS_BLOCKSPERPAGE]
> forKey: INDEXKEY_BLOCKSPERPAGE];
> _blockSize = DEFAULTS_BLOCKSIZE;
> _blocksPerPage = DEFAULTS_BLOCKSPERPAGE;
> if (![index writeToFile: indexFilePath atomically: YES]) {
> _dirPath = nil;
> NSLog(LOGMSG_INDEXFILENOTWRITABLE);
> }
> [index release];
> } else {
> NSDictionary *index = [NSDictionary
> dictionaryWithContentsOfFile:
> indexFilePath];
> if (nil == [index objectForKey: INDEXKEY_BLOCKSIZE]) {
> NSLog(LOGMSG_INDEXFILEOUTOFFORMAT);
> _dirPath = nil;
> } else
> _blockSize = [(NSNumber*)[index objectForKey:
> INDEXKEY_BLOCKSIZE]
> longValue];
> if (nil == [index objectForKey: INDEXKEY_BLOCKSPERPAGE]) {
> NSLog(LOGMSG_INDEXFILEOUTOFFORMAT);
> _dirPath = nil;
> } else
> _blocksPerPage = [(NSNumber*)[index objectForKey:
> INDEXKEY_BLOCKSPERPAGE] longValue];
> [index release];
> }
>
> the [index release] on the second branch gives me the following output
> on the debugger window :
>
> TestRunnrer(1661) malloc: *** error for object 0x112a50: double free
> *** set a breakpoint in malloc_error_break to debug
>
> in the enclosing scope I have set up an autorelease pool. What I am
> suspecting is that when I init the dictionary with a file it is
> autoreleased, and then the error when I do the release. I this the
> case ? If so where do I know when some object is created autoreleased
> or not ? In the NSDictionary's reference page there is nothing
> mentioned.
>
> Many thanks
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--
Ben Hatfield
[EMAIL PROTECTED]
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