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.

"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

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.

When you ride a bike and you get your heart rate up and youre out after 30 or 40 minutes your mind tends to expand it tends to relax.

There is no single theory that is used in economics that considers the finite nature of resources. It's shocking.

Acknowledge your limitations or they will tyrannize over you.

The Olympics is nothing I ever dreamed about. I dreamed about playing for Coach Knight and Indiana.

Certain brief sentences are peerless in their ability to give one the feeling that nothing remains to be said.

I do have a problem with how 'Politico' has engaged in covering politics, especially on our side. I think it is tweet-happy, it is clickbait in many cases, and it's devoid of facts.

I love chocolates. It could be something as simple as a chocolate cake with vanilla ice-cream, or it could be macarons filled with chocolate.

Climate change constitutes a serious threat to global security.

In fashion, there are so many gangs, if you identify too much with one, you get caught - I would lose my freedom.

Every man is a consumer, and ought to be a producer. He is by constitution expensive, and needs to be rich.

Now's the best time you'll ever have in life to get ahead!

To be honest, I'm in love with denim. It hasn't been my go-to Lion Babe look, but it's very much my 'everyday Jillian look.' I am in denim every single day.

I know of dude-bands who've brought big, crazy dogs on tour. Everybody loves their animal.

Exaggeration is a blood relation to falsehood and nearly as blamable.

Our acts make or mar us, we are the children of our own deeds.

On a day when you're tired, it's important to just say good morning to everyone so they're kind of aware that it's gonna be a good day. Jamie Lee Curtis told me that.

The best thing you can learn from the worst times of your life is that it always gets better. It may take a month, a year, a decade, but it will get better if you leave yourself open to it.

I go to my favourite tournament, I talk about my favourite sport and it's just a great month of parading.

I was anorexic in the '60s and '70s, although it wasn't called anorexia then. I thought people would be nicer to me if I looked very small and delicate, so food wasn't high on my agenda. But it is now.

The scariest thing about receiving praise at a young age is the fear of burning out or losing it, or proving people right that you were just a novelty. Obviously, I can see mistakes in things that I've done or said and can see flaws in things I've made, but that's just part of growing.

Hunter High School was a real turning point for me. I found out about its existence through the music school. Nobody I knew had gone to one of these special high schools, and my teachers didn't think it was possible to get in. But Hunter sent me a practice exam, and I studied what I needed to know to pass the exam.

It took us about a day and a half to find out what had gone wrong.

I want to make sure I don't interfere with the success of that team next year. I don't see any way I could go to practice like most of 'em do, and not hurt the team. I'd go nuts if I tried doing that.

I want everybody to go jump in the ocean to see for themselves how beautiful it is, how important it is to get acquainted with fish swimming in the ocean, rather than just swimming with lemon slices and butter.