objective-c - NSCondition を使用したスレッドのロック解除 (Objective-C)

Question

私は Objective-C を使用しており、互いに通信する必要があるスレッドを操作しようとしていました。

コードは次のとおりです。

-(id) init
{
    self = [super init];
    if (self) {
        _event = [[MyTestClass alloc]init]; //MyTestClass has a property of type NSCondition
    }
    return self;
}


-(void) func1
{
NSLog(@"The Function 1 is being called");
NSLog(@"Locking The First function");
[self.event.myCondition lock];
[self.event.myCondition wait];
NSLog(@"Resuming Function 1");
    NSLog(@"This is a test 1 ");
    NSLog(@"This is a test 2");
    NSLog(@"Terminating func 1");
}
-(void) func2
{
    NSLog(@"2");
    NSLog(@"Hey Hey Hey How are you 0 ");
    NSLog(@"Hey Hey Hey How are you 1 ");
    NSLog(@"Hey Hey Hey How are you 2");
    NSLog(@"Signaling function 1");
    [self.event.myCondition signal];
    NSLog(@"Hey Hey Hey How are you 3");
    NSLog(@"Terminating func 2");
}

以下のように、2 つの別々のスレッドで func1 と func2 を実行します。

- (void)viewDidLoad {
    [super viewDidLoad];
    SuperTestClass * n = [[SuperTestClass alloc]init];
    // Do any additional setup after loading the view, typically from a nib.
    MyTestClass * m = [[MyTestClass alloc]init];
    dispatch_queue_t newQueue =     dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0);
    dispatch_group_t newGroup = dispatch_group_create();
    dispatch_group_async(newGroup, newQueue, ^{
        [n func1];
    });
    dispatch_group_async(newGroup, newQueue, ^{
        [n func2];
    });
    dispatch_group_wait(newGroup, DISPATCH_TIME_FOREVER);
    NSLog(@"All process have terminated");
}

このコードを実行すると、次のエラーが表示されます

2015-07-07 19:05:54.528 signalingInObjectiveC[31617:319892] 2
2015-07-07 19:05:54.528 signalingInObjectiveC[31617:319894] The Function 1 is being called
2015-07-07 19:05:54.529 signalingInObjectiveC[31617:319892] Hey Hey Hey How are you 0 
2015-07-07 19:05:54.529 signalingInObjectiveC[31617:319894] Locking The First function
2015-07-07 19:05:54.529 signalingInObjectiveC[31617:319892] Hey Hey Hey How are you 1 
2015-07-07 19:05:54.529 signalingInObjectiveC[31617:319892] Hey Hey Hey How are you 2 
2015-07-07 19:05:54.530 signalingInObjectiveC[31617:319892] Signaling function 1
2015-07-07 19:05:54.530 signalingInObjectiveC[31617:319892] Hey Hey Hey How are you 3 
2015-07-07 19:05:54.530 signalingInObjectiveC[31617:319894] Resuming Function 1
2015-07-07 19:05:54.530 signalingInObjectiveC[31617:319892] Terminating func 2
2015-07-07 19:05:54.530 signalingInObjectiveC[31617:319894] This is a test 1
2015-07-07 19:05:54.530 signalingInObjectiveC[31617:319894] This is a test 2
2015-07-07 19:05:54.530 signalingInObjectiveC[31617:319894] Terminating func 1
2015-07-07 19:05:54.530 signalingInObjectiveC[31617:319870] All process have terminated
2015-07-07 19:05:54.535 signalingInObjectiveC[31617:319870] *** -[NSCondition dealloc]: condition (<NSCondition: 0x7fa2aa517180> '(null)') deallocated while still in use
2015-07-07 19:05:54.535 signalingInObjectiveC[31617:319870] *** Break on _NSLockError() to debug.

ロックを解除する方法に何が問題なのか疑問に思っています。