Apache Portable Runtime Utility Library: Thread Safe FIFO bounded queue
http://apr.apache.org/docs/apr-util/0.9/group__APR__Util__FIFO.html FIFo quque (thread safe) in apache runtime
http://apr.apache.org/docs/apr-util/0.9/group__APR__Util__FIFO.html FIFo quque (thread safe) in apache runtime