#include "mbed.h"
#include "rtos.h"

/*
 *  https://os.mbed.com/questions/77791/Correct-construction-for-callback-on-a-m/ 
 */




class OtherClass
{
public:
    OtherClass(DigitalOut* out) :
        _out(out) {};
    ~OtherClass(void) {}

    DigitalOut* digitalOut() {
        return _out;
    }
private:
    DigitalOut* _out;
};

class MyClass
{
public:
    MyClass(OtherClass* other) :
        _other(other) {}
    ~MyClass(void) {}

    void myCallback(void) {
        while (1) {
            *_other->digitalOut() = !*_other->digitalOut();
            wait(1);
        }
    }
private:
    OtherClass* _other;
};

int main(void) {
    OtherClass  otherClass(&led2);
    MyClass     myClass(&otherClass);

    thread.start(callback(&myClass, &MyClass::myCallback));  // callback using member function
    while (true) {
        led1 = !led1;
        wait_ms(500);
    }
}