Hi Daniel,
See comments inline.
On Dec 21, 2007 3:37 AM, dakl <[EMAIL PROTECTED]> wrote:
>
> Hi all,
>
> I am building using macfuse to create a filesystem that displays bt-
> devices as folder. Here's my header:
>
> @interface HelloFuseFileSystem : FUSEFileSystem{
> BlueLister * lister;
> BOOL hasFoundDevices;
> NSDictionary * myDevices;
> }
>
> - (HelloFuseFileSystem *) init;
> - (void) foundDeviceDictionary;
> - (void) printDeviceDictionary;
> - (NSArray *) rootContents;
>
> - (IBAction) findDevices:(id) sender;
>
> @end
>
> As you can tell, I am building it on top of the HelloFuse example from
> Google.
>
> However, I am having some trouble with the myDevices-variable. I am
> setting it to a default value in my init (for testing purposes) like
> so:
>
> - (HelloFuseFileSystem *) init {
> self = [super init];
> // set defaults
> hasFoundDevices = NO;
>
> NSArray * addresses = [NSArray
> arrayWithObjects:@"00-00-00-11-00",
> @"aa-ee-aa-ff-aa", nil];
> NSArray * names = [NSArray
> arrayWithObjects:@"Device 1", @"Device
> 2", nil];
> myDevices = [NSDictionary dictionaryWithObjects:addresses
> forKeys:names];
>
I think these calls are creating objects that are autoreleased. In init you
should be retaining anything you'd like to keep for the lifetime of the
object. You should probably also release them in dealloc as well.
The arrays might be fine to keep as-is since the dictionary should retain
whatever you put in it. The dictionary might go away when the autorelease
pool is cleaned up. Try changing to:
myDevices = [[NSDictionary alloc] initWithObjects:addressess forKeys:names];
instead. Also add a:
- (void)dealloc {
[myDevices release];
[super dealloc];
}
and let me know if that fixes your problem.
ted
>
> [self printDeviceDictionary];
> return self;
> }
>
> As you can see, I'm also printing its contents using my
> printDeviceDictionary. So far everthing works exellent. In my
> implementation of contentsOfDirectoryAtPath, I start out by printing
> the device dictionary again. This time, the debugger comes up, saying
>
> 0x90a59380 <+0016> mov 0x20(%eax),%eax
>
> I have been able to pinpoint the issue to the exact row in
> printDeviceDictionary where I'm trying to access myDevices, but I
> don't understand the error. I'm on Mac OS X 10.4.11 using XCode 2.5
>
> - (void) printDeviceDictionary {
> NSLog(@"Printing device dictionary\n");
> id key;
> NSEnumerator * enumerator = [myDevices keyEnumerator];
>
> NSLog(@"Printing device dictionary 2\n");
> while ((key = [enumerator nextObject])) {
> NSLog(@"%@ : %@", key, [myDevices objectForKey:key]);
> }
> NSLog(@"Done.\n");
> }
>
> Does anyone have any ideas on why my supposedly global variable
> myDevices "disappears"?
>
> Best
> Daniel
> >
>
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