array_returning.cs

// The interop signature in the Unity script.
[DllImport("mypluginname")]
private static extern bool getSomeArrayData(ref IntPtr ptrResultVerts, ref int resultVertLength);

// An example of calling the interop function.
public MyMarshallingMethod()
{
        IntPtr ptrResultVerts = IntPtr.Zero;
        int resultVertLength = 0;

     bool success = getSomeArrayData(ref ptrResultVerts, ref resultVertLength)
     float[] resultVertices = null;
     if (success)
     {
         // Load the results into a managed array.
         resultVertices = new float[resultVertLength];
         Marshal.Copy(ptrResultVerts
             , resultVertices
             , 0
             , resultVertLength);
          /*
          * WARNING!!!! IMPORTANT!!!
          * In this example the plugin created an array allocated
          * in unmanged memory.  The plugin will need to provide a
          * means to free the memory.
          */
     }