added example for passing non static memberfunctions as callback

training/callbacks_in_cpp/Makefile

@@ -0,0 +1,20 @@
+cpp_src = $(wildcard *.cpp) 
+
+cpp_obj = $(cpp_src:.cpp=.o)
+c_obj = $(c_src:.c=.o)
+CC = g++ 
+CFLAGS = -Wall -pedantic -li2c 
+LDFLAGS = 
+EXEC = runtest
+
+
+all : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -o $@ $^ $(LDFLAGS) 
+ 
+clean: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+
+cleanall: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)

training/callbacks_in_cpp/main.cpp

@@ -0,0 +1,65 @@
+#include <stdint.h>
+#include <unistd.h>
+#include <iostream>
+#include <functional>
+
+class Device
+{
+	public:
+		// cllback type
+		typedef std::function<unsigned int(unsigned int)> cb_t;
+
+		Device(cb_t cb) : cb(cb)//Device(cp_t cb) : cb(cb)
+		{
+			
+		};
+
+		void do_something(void)
+		{
+			unsigned int return_value;
+			return_value = cb(1);
+
+			std::cout << return_value << std::endl;
+		};
+	
+	private:
+		cb_t cb;
+};
+
+
+class Interface
+{
+	public:
+
+		Interface()
+		{
+			std::cout  << "created interface object" << std::endl;
+		};
+
+		unsigned int read_write(unsigned int  input)
+		{
+			std:: cout << "calling read_write"<< std::endl;
+			std::cout << input << std::endl;
+			return 5;
+		};
+
+	private:
+};
+
+int main(void)
+{
+	//using namespace std::placeholders; // for _1, _2, ...
+	std::cout << "callback_example" << std::endl;
+	
+	Interface iface;
+	
+	//unsigned int ret = iface.read_write(1);
+
+	//std::cout << ret << std::endl;
+	//auto cb = std::bind(&Interface::read_write, &iface,_1);	
+	auto cb = std::bind(&Interface::read_write, &iface, std::placeholders::_1);
+	Device device(cb);
+
+	device.do_something();	
+	return 0;
+}