Pipes

Pipes are the lowest level in a multithreaded system. They implement communcation between modules contained in their own threads.

Pipes provide:

• Thread-safety through C++11 mutexes
• Nonblocking access to ensure one unintended exception does not affect other threads
• A protected queue of Messages Pipes are accessed through calls to either void pushQueue(Message\*) or Message* popQueue(), which access the internal stack of Messages. nullptr is returned if the stack is empty; you must handle this case.