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

"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_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.

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.

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.

There's something honorable about holding out for love and not breaking up for the sake of the baby. I see people get divorced, and there is a part of me that thinks, I wonder how hard they tried?

Some people feel guilty about their anxieties and regard them as a defect of faith but they are afflictions, not sins. Like all afflictions, they are, if we can so take them, our share in the passion of Christ.

'Gimme a Break' ran for six years and gave me the kind of money and freedom that I'd dreamed would make me happy. It didn't.

We need a new Latin American policy that is bold - different. We need to focus on building civil society, focus on the lack of infrastructure. We need look at ways to foster economic opportunity.There needs to be a more comprehensive economic vision in the region.

Influence is the new power - if you have influence, you can create a brand.

Many men start being friendly with women because they are trying to seduce them. I'm not trying to seduce them. I just like hanging out with them.

The post office doesn't guarantee delivery, but it tries really hard. It's called best efforts communication. If you put two postcards in the post-box, they don't necessarily come out then in the same order that you put them in. So, that means that there's potentially disorder with your delivery, and that's also true in the Internet.

It is crucial that young people are taught sustainable child production and rearing.

The biggest need that women have is more time. We all want more time in our lives. More time in the morning to get ready. More time in the evening to spend time with our families. All of these things - more time to move up that career path. It's about time.

I just try to do as well as possible.

Luxury hasn't been democratised; it's been globalised.

I always remember responding very emotionally to film. I had a lot of lonely time on my hands because I wasn't really the best-looking kid in my town and I sort of pined after girls. I had to sort of immerse myself in the arts because girls weren't particularly interested in me.

Better ways to diagnose, treat and prevent E. coli 0157:H7 infections are badly needed.

I want to be part of the storytelling that educates people and awakens a sense of compassion in other people of the kind of people they don't encounter in their daily lives very frequently.

Sometimes I get so wrought up being brushed, poked and pinned all day.

Well, it's an adventure story, and a Bildungsroman, of course, but there was also the intention to describe a culture that had been seen in rather narrow terms.

I definitely want to do more movies, and I'm also a writer, so I have a few screenplays that I'm working on, one of them based off my one-woman show that I used to do in New York. Two of the screenplays I've written by myself, and then I'm also working on one with my writing partner, Tom Riley, who's in London.

To suggest that you can't be both a mother who is completely in love with her babies, and a professional who is tough and tenacious, is ridiculous.

One of the things that Teller and I are obsessed with, one of the reasons that we're in magic, is the difference between fantasy and reality.

To me, one of the big silver linings of the Simpson trial is the advances we've made in understanding domestic violence as a lethal problem. Before that trial, I think there was a widespread sense that it was a family affair, a normal part of a relationship, not really a crime. The reality is that it's very much a crime, and a very serious one.

Emeril is a one-in-a-million Renaissance man. In 2002, he established his foundation to support children's educational programs to inspire and mentor young people through culinary arts, school food and nutrition.

There's so much crap talked about acting.

I ended up doing a local AmDram musical when I was nine or so. We had to sing and dance and act. It was probably terrible, but I loved it.

The thirst of desire is never filled, nor fully satisfied.