How to marshal int* in C#?
- by MartyIX
Hi,
I would like to call this method in unmanaged library:
void __stdcall GetConstraints(
unsigned int* puiMaxWidth,
unsigned int* puiMaxHeight,
unsigned int* puiMaxBoxes
);
My solution:
Delegate definition:
[UnmanagedFunctionPointer(CallingConvention.StdCall)]
private delegate void GetConstraintsDel(UIntPtr puiMaxWidth, UIntPtr puiMaxHeight, UIntPtr puiMaxBoxes);
The call of the method:
// PLUGIN NAME
GetConstraintsDel getConstraints = (GetConstraintsDel)Marshal.GetDelegateForFunctionPointer(pAddressOfFunctionToCall, typeof(GetConstraintsDel));
uint maxWidth, maxHeight, maxBoxes;
unsafe
{
UIntPtr a = new UIntPtr(&maxWidth);
UIntPtr b = new UIntPtr(&maxHeight);
UIntPtr c = new UIntPtr(&maxBoxes);
getConstraints(a, b, c);
}
It works but I have to allow "unsafe" flag. Is there a solution without unsafe code? Or is this solution ok? I don't quite understand the implications of setting the project with unsafe flag.
Thanks for help!
