pthread_mutex_destroy() does not free the memory used to store the pthread_mutex_t. It's up to you to free() your own memory. Also remember that both pthread_mutex_init() and pthread_mutex_destroy() return zero on success.

"dead list" that contains all stopped threads and then have a special cleanup thread that simply waits for an item to be added to the list. The cleanup thread calls pthread_join() to merge it with itself. Now your entire cleanup will be handled neatly and efficiently in a single thread.

mutexes are used to serialize access to *shared data*. Don't use them for non-shared data, and don't use them if your program's logic ensures that only one thread is accessing a particular data structure at a single time.

if you are using shared data, use mutexes for both reading and writing. Surround your read and write sections with pthread_mutex_lock() and pthread_mutex_unlock(), or use them any time a program's invariant is temporarily broken.

pthread_mutex_lock() accepts a single pointer to a mutex to lock. If the mutex already happens to be locked, the caller will go to sleep. When the function returns, the caller will be woken up (obviously), and the caller will also now hold the lock. This call either returns zero on success.

You should always unlock a mutex that you've locked as soon as safely possible (to increase performance). And you should never unlock a mutex that you don't hold a lock for

When you call pthread_mutex_trylock() you'll attempt to lock the mutex. If the mutex is currently unlocked you'll get the lock, and this function will return zero. However, if the mutex is locked this call won't block. Rather, it will return a non-zero EBUSY error value.

pthread_cond_wait() simultaneously unlock the mutex (so that other threads can modify the linked list) and wait on the condition (so that pthread_cond_wait() will wake up when it is "signalled" by another thread). Now that the mutex is unlocked, other threads can access and modify the linked list, possibly adding items

pthread_cond_wait() call has not yet returned. Unlocking the mutex happens immediately, but waiting on the condition mycond is normally a blocking operation, meaning that our thread will go to sleep, consuming no CPU cycles until it is woken up.

This is exactly what we want to happen. Our thread is sleeping, waiting for a particular condition to become true, without performing any kind of busy polling that would waste CPU time. From our thread's perspective, it's simply waiting for the pthread_cond_wait() call to return.

Immediately after unlocking the mutex, thread 2 calls the function pthread_cond_broadcast(&mycond). By doing so, thread 2 will cause all threads waiting on the mycond condition variable to immediately wake up. This means that our first thread (which is in the middle of a pthread_cond_wait() call) will now wake up.

After thread 2 called pthread_cond_broadcast(&mymutex) you might think that thread 1's pthread_cond_wait() will immediately return. Not so! Instead, pthread_cond_wait() will perform one last operation: relock mymutex. Once pthread_cond_wait() has the lock, it will then return and allow thread 1 to continue execution.

I love the German and the Swiss people for their many fine traits of character. I love their language that is so exacting and yet so expressive.

You have to be brave and not always play likeable people. It's difficult, because there's a demand for the hero or heroine to be very likeable.

Maybe I should say that memory interests me a great deal, because I think we all tell stories of our lives to ourselves as well as to other people. Well, women do, anyway. Women do this a lot. And I think when men get older, they do this too, but maybe in slightly different terms.

The treatment is really a cooperative of a trinitythe patient the doctor and the inner doctor.

I went to a seminar early in my career on the craft of storytelling by Robert McKee. It was really life altering. There are basic principles on how to craft an engaging story and he covers them well. He's got a book out, 'Story,' that I would highly recommend to anyone interested in improve their storytelling.

Some people recovering from drugs or alcohol stay with the programs indefinitely, making the recovery program their family, a long-term source of attention rewards.

This young century will be liberty's century.

My mom would still be mad if I didn't say 'please' and 'thank you.'

Things are so scary and intimidating with AIDS and the right wing that people are looking for somebody to just give them safe harbors.

One of the earliest resurrection scenes in the Bible is that of Thomas demanding evidence - he wanted to see, to touch, to prove. Those who question and probe and debate are heirs of the apostles just as much as the most fervent of believers.

I believe in rules. Sure I do. If there weren't any rules, how could you break them?

Highly educated young people are tutored, taught and monitored in all aspects of their lives, except the most important, which is character building. When it comes to this, most universities leave them alone.

I would love to work more - I really would - but there is not a lot of stuff around and the stuff that is around is not very complicated; it tends to lie a little flat.

If you think that something worked and your directing partner doesn't think so, then maybe you have to re-think what you were doing.

Risk creates the conditions under which a certain creativity can manifest itself. Different materials force different risks and evoke different perceptions.

One of the hardest tasks is to extract continually from one's soul an almost inexhaustible ill will.

I love everything from old-school cars to whatever the latest muscle or luxury vehicles are.

Masood Ahmed brings to the position of director of external relations extensive experience gained in a range of senior positions in international finance and development.

You can have a phenomenal technology with bad people; you're not gonna have much success. You can have mediocre technology with great people; they'll figure out a way to make a buck.

My inspiration comes from the common man and nature.

Pain was something we were expected to endure. But I doubt very much if you would be entirely happy today if a doctor threw a towel in your face and jumped on you with a knife.

The challenge for a director - and I think a lot of directors feel the same way - is that today we have to put on a producer's hat, too. Meaning, you have to sometimes think of it being 'business show,' not just 'show business.'

Pictures are for entertainment, messages should be delivered by Western Union.

As long as your storytelling and emotional depth are intact, that's what people will focus on.