Simple Concurrent Queue implementation in C++ using pthreads. It is actually implemented in C style. The only used C++ features are

• templates for generalization,
• member functions for conciseness of the implementation.

The implementation was born during research about parallel downloading for Vodus project. After the research I came to the conclusion that I don't need this queue in the project, but I didn't want to throw the implementation away, so I put it here for future needs.