代码:
[StructLayout(LayoutKind.Sequential)]
public struct emxArray_real_T
{
public IntPtr data;
public IntPtr size;
public int allocatedSize;
public int numDimensions;
[MarshalAs(UnmanagedType.U1)]
public bool canFreeData;
}
public class emxArray_real_T_Wrapper : IDisposable
{
private emxArray_real_T value;
private GCHandle dataHandle;
private GCHandle sizeHandle;
public ref emxArray_real_T Value
{
get { return ref value; }
}
public double[] Data
{
get
{
double[] data = new double[value.allocatedSize];
Marshal.Copy(value.data, data, 0, value.allocatedSize);
return data;
}
}
public emxArray_real_T_Wrapper(double[] data)
{
dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
value.data = dataHandle.AddrOfPinnedObject();
sizeHandle = GCHandle.Alloc(new int[] { 1, data.Length }, GCHandleType.Pinned);
value.size = sizeHandle.AddrOfPinnedObject();
value.allocatedSize = data.Length;
value.numDimensions = 1;
value.canFreeData = false;
}
public void Dispose()
{
dataHandle.Free();
sizeHandle.Free();
GC.SuppressFinalize(this);
}
~emxArray_real_T_Wrapper()
{
Dispose();
}
宣言:
[DllImport("TestFunc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern void TestFunc(int n, double WnLow, double WnHigh, ref emxArray_real_T kernel);
使用它:
public double[] CalculateBandPassCoefficients(int order, double FreqCutoffNormLow, double FreqCutoffNormHigh)
{
double[] kernel = new double[order];
using (emxArray_real_T_Wrapper wb = new emxArray_real_T_Wrapper(kernel))
{
TestFunc(order, FreqCutoffNormLow, FreqCutoffNormHigh, ref kernelWrapper.Value);
kernel = kernelWrapper.Data;
}
return kernel;
}