cpp-EventEmitter

Attach lightweight C++11 event emitting and handling capabilities to your existing C++ classes.

Compatible with GCC 4.7 and newer, Visual Studio 2013 (tested with RC) and Clang++ (with some multi-threading issues)
Single header file that you can copy to your codebase
Attach event handlers with lambda functions and construct very readable, elegant and concise code.
Define new emitters with a DefineEventEmitter macro to use methods such as emitChatMessage, onChatMessage or use EventEmitter<Args> template to define an event emitting member with methods on, trigger.
Leak-safe, uses shared pointers all over the place.
Different classes for different uses.

EventEmitter class

Events are immediately called upon trigger.
sizeof(void*) overhead for non-initialized emitter and 3 * sizeof(void*) per each attached handler.
Lightweight.

Events are cached upon trigger and run when called runDeferred() or runAllDeferred(). Useful when a different thread is a producer of events but you want the handlers to run in another thread.
Thread safe, mutex protected methods.

Base EventEmitter functionality and DeferredEventEmitter compiled, the latter under defer instead of trigger.
Utilities for waiting for events, getting future results as std::future, adding async handlers and general thread safety.

Similiar to EventEmitter but dispatch events based on first argument, for example std::string.