closure2fp

An example to illustrate how libffi cast a closure to a pointer to function. Note that this only works on Linux x86_64.

Blog post link:

• Cast a Closure to a Function Pointer -- How libffi closure works
• 把闭包变成函数指针 ——libffi 闭包原理解析

Sources

• closure.c closure.h: The closure lib to cast a closure to a raw function pointer.
• lib.c lib.h: The lib that provides API to register callback.
• main.c: The example that uses lib.h well-designed callback API.
• main.cpp: The example that uses lib.c well-designed callback API with a cpp wrapper.
• main_bad.c: The example that uses lib.h bad-designed callback API.
• main_bad.cpp: The example that uses lib.c bad-designed callback API with a cpp wrapper.