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.

"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.

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.

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 would like the world to know that Yemeni women are strong, and if empowered, they can achieve. The world needs to look beyond stereotypes and dress code. In our hearts, we are just human beings who want to live a dignified life. Is that too much to ask for?

Professional comedians, surprisingly, have a lack of humor. They're insensitive to the insanity of our times.

I'm a socialist, and I'm not going to be ashamed to say it!

I really owe everything to my parents and their devotion and drive to see to it that their children had the education which led to the opportunities that they never were able to have.

Our experiments not only proved the existence of a nervous apparatus in the above-mentioned glands, but also disclosed some facts clearly showing the participation of these nerves in normal activity.

I do not have time to sit down and regret anything although sometimes I wish I had been able to see more of my parents while they were alive and have done more for them.

I always assumed that everyone knew no country would ever be awarded a World Cup without pricey gifts exchanging hands under the tables.

The more we learn of science, the more we see that its wonderful mysteries are all explained by a few simple laws so connected together and so dependent upon each other, that we see the same mind animating them all.

For broad understanding and deep feeling, you need pain and suffering.

What people can excel our Northern and New England brethren in skill, invention, activity, energy, perseverance, and enterprise?

People demand freedom of speech to make up for the freedom of thought which they avoid.

Fascism is itself less ideological in so far as it openly proclaims the principle of domination that is elsewhere concealed.

We feel like if we miss a Sunday at church, that's one thing, but we can't miss an opportunity to help.

May what I do flow from me like a river, no forcing and no holding back, the way it is with children.

It's about not rewarding your children with food, not always celebrating with food. I do think it's important to find other ways to comfort our children and ourselves, to work other ways of celebrating and rewarding.

I was Aladdin, and then I was Captain Von Trapp from 'Sound Of Music' when I was 7 or 8, and then King Arthur. I was always the lead. I've always enjoyed being onstage, acting obnoxious, being someone that wasn't me, hiding behind a character.

When they hear from you, it counts. That's how we're going to win.

A poet's work is to name the unnameable, to point at frauds, to take sides, start arguments, shape the world, and stop it going to sleep.

It's obviously unfair to paint with a broad brush here, but the germ of an idea for a breakthrough in technology doesn't come out of a business school curriculum. It comes out of a laboratory or a math lecture or a physics tutorial.

The crime problem in New York is getting really serious. The other day the Statue of Liberty had both hands up.

I have got one of those faces that change every day: you can dress me up, make me look vampy and then make me look 12 years old. But don't all women do this thing? We all take on these roles.

I am really cautious about what I say and do.

I think there are steps that can be taken that haven't been required or energy to make that fight more secure and we are going to continue to push the federal government to do that.

Food decisions - do I eat this or not? - are always going to be there.