Re: How to know, which NSThread has terminated?

[Shaun Wexler]

On May 28, 2004, at 4:57 PM, Philip Mötteli wrote:

> When I fork a thread using
>
> 	+(void)detachNewThreadSelector:(SEL)aSelector toTarget:aTarget 
> withObject:anArgument
>
> I have no idea how to recognize this just created thread later, when 
> it terminates. What I need is something like a handle. I mean 
> objc_thread_detach() gives back an objc_thread_t too.
> I could put some flag into the tread dictionary, but it would be so 
> much nicer to be able to just ask the thread for its handle or to keep 
> the address of the NSThread instance. But because there's void as the 
> return value, all this is not possible.
> How do people keep track of a specific thread, using NSThread?

Written in Mail.app:

- (void)detachManagedThreadSelector:(SEL)selector toTarget:(id)target 
withObject:(id)identifier
{
	NSMethodSignature *signature = [target 
methodSignatureForSelector:selector];
	NSInvocation *invocation = [NSInvocation 
invocationWithMethodSignature:signature];
        [invocation setTarget:target];
        [invocation setSelector:selector];
        [invocation setArgument:[identifier retain] atIndex:2];

	[NSThread detachNewThreadSelector:@selector(managedThread:) 
toTarget:self withObject:invocation];
}

- (void)managedThread:(id)invocation
{
	NSAutoreleasePool *pool = [[NSAutoreleasePool allocWithZone:NULL] 
init];

        id identifier;
        [invocation getArgument:&identifier atIndex:2];

        if (identifier) {
                @synchronized(managedThreads) {
			[managedThreads setObject:[NSThread currentThread] 
forKey:identifier];
                }
        }
        @try {
                // set up any connections, ports, pipes, etc.
                [invocation invoke];
        }
        @catch (NSException *exception) {
                [NSApp reportException:exception];      
        }
        @finally {
                // clean up connections, etc.
        }
        if (identifier) {
                @synchronized(managedThreads) {
                        [managedThreads removeObjectForKey:identifier];
                        [identifier release];
                }
        }
        [pool release];
}
--
Shaun Wexler
MacFOH
http://www.macfoh.com

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