Calling a C# function from C++

This is a simple example of calling a C# function from C++.

First you need to send the function pointer from C#:

using CppInator.Runtime;

delegate void MyFancyCallback(int number);

[DllImport("__Internal")]
static extern void CallMeBaby(MyFancyCallback callback);

void Start()
{
    Native.Invoke(CallMeBaby, (MyFancyCallback)callback);
}

// MonoPInvokeCallback is required for the callback to work on iOS
[MonoPInvokeCallback(typeof(MyFancyCallback))]
void WhenCalled(int value)
{
    Debug.Log("Omg, her number is: " + value);
}

Then you need to call the function from C++:

#include <unityengine.h>

typedef void (*MyFancyCallback)(int);

EXPORT(void) CallMeBaby(MyFancyCallback callback)
{
    callback(8675309);
}