public static void Ch7ModifyCh7Pointer()
{
//create objects to use
var value = new Ch7Pointer();
var ch7StringAW = new Ch7StringAW
{
asValue = "BBBB".ToArray(),
wsValue = "你你你你".ToArray(),
};
int iValue = 123;
//alloc memory from process heap
value.ch7StringAWPtr = Marshal.AllocHGlobal(Marshal.SizeOf(ch7StringAW));
value.iValuePtr = Marshal.AllocHGlobal(Marshal.SizeOf(iValue));
//copy managed object memory to native heap
Marshal.StructureToPtr(ch7StringAW, value.ch7StringAWPtr, false);
Marshal.StructureToPtr(iValue, value.iValuePtr, false);
//call method
if (Ch7Native.Ch7ModifyCh7Pointer(value))
{
//copy native heap to managed object memory
ch7StringAW = (Ch7StringAW)Marshal.PtrToStructure(value.ch7StringAWPtr, typeof(Ch7StringAW));
iValue = (int)Marshal.PtrToStructure(value.iValuePtr, typeof(int));
}
//do not forgot free native heap memory
Marshal.FreeHGlobal(value.ch7StringAWPtr);
Marshal.FreeHGlobal(value.iValuePtr);
value.ch7StringAWPtr = IntPtr.Zero;
value.iValuePtr = IntPtr.Zero;
}
public static extern bool Ch7ModifyCh7Pointer([In, Out] Ch7Pointer value);