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.

"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.

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.

I also became interested in chemistry and gradually accumulated enough test tubes and other glassware to do chemical experiments, using small quantities of chemicals purchased from a pharmacy supply house.

L. A. is crazy. The women all look the same now. That thing with the cheeks. Like Madonna. Who do they think they're fooling? It doesn't make them look young. You end up looking like a freak.

It's been interesting. I went through a period where a lot of people would recognize me, and then when I had injures and my ranking dropped, not as many people did.

The License Raj in India was a time when, to set up an industry, you needed a license. Which made the government an omnipresent and sort of all-pervasive authority.

I eat soup noodles for comfort. In fact, noodles of any kind. It's a food that is very easy to eat; it's very soothing and comfortable, too. If I could choose any, I'd say buckwheat was my favourite: it has a very good flavour and is healthy, too.

When twilight drops her curtain down and pins it with a star, remember that you have a friend though she may wander far.

Just keep being true to yourself if youre passionate about something go for it. Dont sacrifice anything just have fun.

Believing in yourself and what you do is so important. It took me a long time to find that confidence. If you're an artist and you're taking risks, then you're doing something right if some people don't get it.

There was a tremendous amount of disappointment in missing the World Cup finals in 1998, so they're getting excited about this one and I really think we could do well in the Far East.

The key to good decision making is evaluating the available information the data and combining it with your own estimates of pluses and minuses. As an economist I do this every day.

What I don't have in theater is editing.

Success and like ability are positively correlated for men and negatively for women. When a man is successful, he is liked by both men and women. When a woman is successful, people of both genders like her less.

As soon as the harvest is in, you're a migrant worker. Afterwards just a bum.

I've always considered the government taking one out of every two dollars I earn absolute tyranny.

It's more than saying sorry. It's meaning it. It's letting the apology change things. But an apology is where it has to begin.

One of the nicest things I ever read about our show was that a critic felt 'Boardwalk Empire' could be the beginning of the blur between television and cinema, because the production values are so high and the storytelling is so compelling.

Thanks to everyone who's encouraged and supported my work over the years.

RUNE is another one I'm really looking forward to.

Nixon was always willing to be bipartisan, so there are a lot of surprises in the man.

I wasn't the one managing my career back then, that was the problem - I was 14 years old.

Poetry is, at bottom, a criticism of life.

Sometimes you just have to accept the fact that some people only enter your life as a temporary happiness.

Why anarchy? Because anything less would be uncivilized.

Yet everything that touches us, me and you, takes us together like a violin's bow, which draws one voice out of two separate strings.