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'm not a mushy person at all.

The moon gravitates towards the earth and by the force of gravity is continually drawn off from a rectilinear motion and retained in its orbit.

Having a purpose and knowing exactly what your values are will add additional years to your life.

We're a little weird. And life is a little weird. And when we find someone whose weirdness is compatible with ours, we join up with them and fall into mutually satisfying weirdness and call it love true love.

'Human' was controversial within The Killers way before it was controversial to the rest of the world! It caused some problems within the band. Not to throw anybody under the bus, but it was pretty much me and Dave against Mark and Ronnie for a little while. We were standing up for the song.

Our story has three parts a beginning a middle and an end. And although this is the way all stories unfold I still cant believe that ours didnt go on forever.

I understand I'm supposed to be feminine and dainty, but I'm not. There are two sides to the coin. People are more impressed with things that I do because they almost treat you as if you're handicapped if you're a woman... people can be impressed that I can play a few chords on the guitar.

I mean, I've had bartenders and waiters and waitresses make a comment about a joke of mine, like pointing out some sort of logic error or something that I've never even thought about, and they're right.

Being engaged in some way for the good of the community whatever that community is a factor in a meaningful life. We long to belong and belonging and caring anchors our sense of place in the universe.

I like to go out, but sometimes it's nice to stay cozy at home, watching movies or TV, especially early in the week.

You can't choose between Love and Friendship. They're like a package: You either get both or you lose both

I definitely want to study global health. Right now I'm working on all the prerequisite core curriculum that Columbia has. So getting all of that out of the way. And I definitely want to pursue something along the lines of public health.

Information's pretty thin stuff unless mixed with experience.

My son is in a band, and he's a singer, and his vocals... they're screaming-growling stuff... and he's got a pretty reasonable voice. Yet he practices really hard to get the screaming-growling thing without losing that voice every five minutes. So I'm, like, 'Hats off to you.'

I'm used to having a lot of criticism. It's normal. It's normal when you come from South America, when you have a country pushing very hard in your back.

Maybe I'm the kind of athlete who absorbs the atmosphere instead of trying to block it out.

The truth is that I love my baby to bits, but the rest of it sucked. Pregnancy was the biggest killer for me. I hated it - I hated being fat.

Winning 'The Apprentice' changed my life in ways I could never have imagined. It has been an amazing experience working for Donald Trump and I am very grateful for the whole opportunity.

If you wanted to design a robot that could learn as well as it possibly could, you might end up with something that looked a lot like a 3-year-old.

If you want to achieve some really big and interesting goals you have to learn to fall in love with hard work.

Theological writing is usually done in essays or books, but I hope to show that if we concentrate on sentences, we may well learn something we might otherwise miss.

There's a duality in every man and every woman.

But what has America to boast? What are the graces or the virtues which distinguish its inhabitants? What are their triumphs in war, or their inventions in peace?

In my experience, sometimes a movie just hits at the wrong time, gets the wrong press, or gets the wrong representation, and it gets misunderstood.