event_base Class Reference

Common base class for all events. More...

#include <event.hpp>

Inheritance diagram for event_base:

Public Member Functions
	event_base (event_base const &)=default
event_base &	operator= (event_base const &)=default
	event_base (event_base &&)=default
event_base &	operator= (event_base &&)=default
virtual size_t	derived_type () const =0

Detailed Description

Common base class for all events.

If possible, use simple_event<> below instead of deriving from event_base directly.

Keep events as simple as possible. Avoid mutexes in your events.

Examples

aio.cpp, events.cpp, https.cpp, nonblocking_process.cpp, raw_https.cpp, and timer_fizzbuzz.cpp.

Member Function Documentation

derived_type()

virtual size_t derived_type ( ) const

pure virtual

The returned pointer must be unique for the derived type such that: event_base& a = ... event_base& b = ... assert((a.derived_type() == b.derived_type()) == (typeid(a) == typeid(b)));

Warning

Using &typeid is tempting, but unspecifined (sic)

According to the C++ standard, the address of a static member function is unique for each type. Unfortunately this does not prevent optimizing compilers to pool identical functions.

Best solution is to have your derived type return the address of a static data member of it, as done in simple_event.

Implemented in simple_event< UniqueType, Values >.

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The documentation for this class was generated from the following file:

• event.hpp