objective c - Invoking thread with a single parameter

Question

-(BOOL)KickTimer:(unsigned short) wTimerIds
    {
        operation1 = [[NSInvocationOperation alloc]initWithTarget:self selector:
                                         @selector(insertEvent:) object:pEvent];
    }

-(void)insertEvent:(stRs232Timer*)pEvent
{
 //stmts;
}

I could not invoke this function.Is this way of invoking a thread with single parameter is correct.

EDITED

pEvent = (stRs232Timer*)[[m_cAppIdMap objectForKey:[NSNumber   
                          numberWithUnsignedShort:wTimerIds]]bytes];

Warning:

Warning: passing argument 3 of 'initWithTarget:selector:object:' 
from incompatible pointer type

Answer 1

From NSOperation class reference:

Operation objects are non-concurrent by default. In a non-concurrent operation, the operation’s task is performed synchronously—that is, the operation object does not create a separate thread on which to run the task. Thus, when you call the start method of a non-concurrent operation directly from your code, the operation executes immediately in the current thread. By the time the start method of such an object returns control to the caller, the task itself is complete.

Consider using:

[NSThread detachNewThreadSelector:@selector(insertEvent:) toTarget:self withObject:pEvent];