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.

The success of family welfare depends on giving women complete freedom with their lives. The need of the hour is that people should plan their families as per their convenience and get the bare minimum health facilities.

Some are bound to die young By dying young a person stays young in peoples memory. If he burns brightly before he dies his brightness shines for all time

Everyone for the most part is really nice. There have always been jokes, but that's part of being in the spotlight. You can't make everyone completely happy.

It's so easy to settle for less than God's best for us because we don't always feel like taking responsibility for our behavior or putting forth some effort to do what we need to do so we can accomplish great things for God and help people. But the cost of settling for less is actually harder than being completely obedient to God's will.

'Monster Trucks' is like a big action movie.

I don't want any yes-men around me. I want everybody to tell me the truth even if it costs them their job.

There is no better form of trade a developing nation can engage in than to sell services provided by an educated population.

There is nothing I feel that connected or passionate about that would take me away from acting.

The events between 1968 and 1980 were the kind of cornerstone for everything I've been able to do, they gave me the springboard.

I wasn't naturally gifted in terms of size and speed; everything I did in hockey I worked for, and that's the way I'll be as a coach.

If you look at satellite photographs of the Far East by night, you'll see a large splotch curiously lacking in light. This area of darkness is the Democratic People's Republic of Korea.

I think the most important thing people can do to save our planet and the human race is to empower women!

The atmosphere of Catholicism in Korea is quite different to the way it is practised and perceived in Europe or the U.S.

I think film requires a lot more patience and concentration and each day you're keeping the entire picture in your head throughout a two to three month film shoot. Whereas TV, especially half hour, is like doing a play a week or live theater.

I love fashion, but it's always been my job, whereas horseriding is my hobby.

I miss performing before a live audience - the energy and excitement - there's nothing to compare with it.

I absolutely love my son and family - they are my life and always come first.

In U.S. discourse, immigrants are mostly represented as less than human, a policy problem, or as just that, a category, and categories are prisons.

If you really want to tell stories, do it and don't be dissuaded.

If you've ever snapped a picture of your dinner, Nom is for you.

I started working around eigth grade. I remember doing a Doritos commercial where there were four days in a row of eating them, and I will tell you, I have not eaten many Doritos since.

I barely got out of high school, and I look back at my life often and go, 'Wow, this was awesome!'

Depending on the show, I've played a cop, a criminal, or a victim. So there's a range.

We already have a professor who's using an online social network of MIT alums to help educate students in programming. Just imagine expanding that in Facebook-fashion to tens or hundreds of millions of people around the world.