Hi there, please help me out. Seems I lost my brain over the last weekend. ;-))
I'm trying to get myself familiar with the boost::thread lib, by reading an article by Bill Kempf published in the C++ magazine in 2002.
Here in listing no. 4 he is using two thread (a reader and a writer ) to access a buffer. In the put() and get() he is using one mutex.
I can't see the article, but I guess I know what's happening.
If the buffer is empty he uses a condition variable to block the mutex. I don't understand how a writer can then enter the put() and write an item into the buffer? The mutex was just blocked by the reader thread?
The condition.wait() is passed the lock. So inside the condition-wait code, the mutex of the lock is unlocked. The mutex will stay unlocked for the duration of the wait-call and then be locked again. /Peter
I guess my question is more fundamental to threads. But hopefully there is someone that can help me out.
Thanks ahead, Christian