cpp_classes.md

BasicSlot:

• a templated function holder, similar to std::function?
• uses bind() to initialise the callback

CyclTime: (why not CycleTime?)

• provides 'clock' functionality like now()
• has a monotonic clock and wall clock internally

Epoll:

• an utility to call epoll_ functions from standard library

EventFd:

• an utility to handle file descriptors
• has members that calls read() and write() from standard library

Hook:

• wraps around BasicSlot to be able to insert it into boost::intrusive::list

Initiator: (CRTP : public StreamConnector<Initiator>)

• represents a socket stream connection?
• handles session events and socket events

Reactor:

• reacts to file descriptors being ready
• poll() member function waits for ready descriptors (epoll_wait), then invokes corresponding callbacks (wrapped inside Timer)

Resolver:

• translates URI to addrinfo
• runs in a thread, uses std::future to pass results

Runner:

• runs 'things' in a separate thread
• a thread-safe stop token to notify the thread to exit

TimerQueue:

• a sorted (by expiry time) list of timers
• when a timer expires (expiry_time < now) it will invoke the callback stored as TimerSlot (see BasicSlot)