public static T[] __FromPInvoke <T>(SafeArray data)
{
if (data.Size == 0)
{
return(new T[0]);
}
var type = typeof(T);
T[] result;
if (type.IsValueType)
{
// Array of structs or builtin types.
var size = Marshal.SizeOf <T>();
result = new T[data.Size / size];
var handle = GCHandle.Alloc(result, GCHandleType.Pinned);
Buffer.MemoryCopy((void *)data.Data, (void *)handle.AddrOfPinnedObject(), data.Size, data.Size);
handle.Free();
}
else
{
// Array of pointers to objects
var tFromPInvoke = type.GetMethod("__FromPInvoke", BindingFlags.NonPublic | BindingFlags.Static);
var pointers = (void **)data.Data;
Debug.Assert(pointers != null);
Debug.Assert(tFromPInvoke != null);
var count = data.Size / IntPtr.Size;
result = new T[count];
for (int i = 0; i < count; i++)
{
result[i] = (T)tFromPInvoke.Invoke(null, new object[] { new IntPtr(pointers[i]) });
}
}
if (data.Owns)
{
MarshalTools.c_free(data.Data);
}
return(result);
}
public static SafeArray __ToPInvoke <T>(T[] data)
{
if (data == null)
{
return(new SafeArray());
}
var type = typeof(T);
var result = new SafeArray {
Owns = true
};
if (type.IsValueType)
{
// Array of structs or builtin types.
result.Size = data.Length * Marshal.SizeOf <T>();
result.Data = MarshalTools.c_alloc(result.Size);
var handle = GCHandle.Alloc(result, GCHandleType.Pinned);
Buffer.MemoryCopy((void *)handle.AddrOfPinnedObject(), (void *)result.Data, result.Size, result.Size);
handle.Free();
}
else
{
// Array of pointers to objects
result.Size = data.Length * IntPtr.Size;
result.Data = MarshalTools.c_alloc(result.Size);
var tToPInvoke = type.GetMethod("__ToPInvoke", BindingFlags.NonPublic | BindingFlags.Static);
var pointers = (void **)result.Size;
Debug.Assert(tToPInvoke != null);
Debug.Assert(pointers != null);
for (var i = 0; i < data.Length; i++)
{
pointers[i] = ((IntPtr)tToPInvoke.Invoke(null, new object[] { data[i] })).ToPointer();
}
}
return(result);
}
