public static void CallChainFromManaged(int a, int b)
{
ArithmeticOperationDelegate latebound;
try
{
// Simplest: Just DllImport ...
Log(string.Format("{0} + {1} = {2}", a, b, AddTwoNumbersInNative(a, b)));
// not with a callback..
Log(string.Format("{0} - {1} = {2}", a, b, SubtractTwoNumbersUsingInlineCallback(a, b, SubtractTwoNumbersInManagedCode)));
// This one function is just a DllImport too.. (like Addition)
// but in this case the function can also be called from C++.
Log(string.Format("{0} * {1} = {2}", a, b, MultiplyTwoNumbersUsingExportedFunction(a, b)));
//now we use a latebound function.
// Gotcha here is that this does not do great error handling.. this might throw if the latebound method pointer is not set
latebound = GetLateBoundDivison();
Log(string.Format("{0} / {1} = {2}", a * b, b, latebound(a * b, b)));
MActivationParamsAsParam activationParams = new MActivationParamsAsParam();
activationParams.commandLineBufferSize = 1024;
activationParams.commandLine = new String('\0', activationParams.commandLineBufferSize);
if (TryGetActivationParams(ref activationParams))
{
Log(string.Format("is First: {0}, params:{1}", activationParams.isFirstActivation, activationParams.commandLine));
}
MActivationParamsAsReturnValue activationParams2 = GetActivationParams();
if (activationParams2.commandLinePtr != IntPtr.Zero)
{
string commandLine = Marshal.PtrToStringUni(activationParams2.commandLinePtr);
int targetLevel = 1;
bool isRoomScale = false;
if (!TryParseCommandLine(commandLine))
{
Log("Failed to parse: " + commandLine);
}
}
else
{
Log("No commandline ");
}
}
catch (EntryPointNotFoundException eeh)
{
Log(string.Format("{0} was not found. If you are trying to use it in UNITY_EDITOR, use a plugin for this", eeh.Message));
}
// Another approach to late binding.
// This is safer on checks if your function is not guaranteed to exist.
try
{
IntPtr lateboundSubtractionPtr = GetLateBoundSubtractionAddress();
if (lateboundSubtractionPtr != IntPtr.Zero)
{
ArithmeticOperationDelegate lateboundSubtraction = Marshal.GetDelegateForFunctionPointer(lateboundSubtractionPtr, typeof(ArithmeticOperationDelegate)) as ArithmeticOperationDelegate;
if (lateboundSubtraction != null)
{
Log(string.Format("{0} - {1} = {2}", a, b, lateboundSubtraction(a, b)));
}
}
else
{
Log("Subtraction was not defined");
}
}
catch (Exception ex)
{
Log(ex.Message);
}
SetComparisonCallback(CompareManagedCallback);
}
extern static bool TryGetActivationParams(ref MActivationParamsAsParam p);
