一个对象回调接口库-a callback object interface library

This document is an attempt to perform a detailed comparison of two implementations of what is widely known as a Signal/Slot library. The two libraries in question are libsigc++ (v2.x) and Boost.Signals. One of the stated goals of this comparison is

qnx下sigc++的源代码，很好用的信号插槽工具。