protected unsafe void SetObject(IntPtr guid, object value)
{
// NOT WORKING with APPDATA
var prop = new PropertyPointer();
InitHeader <PropertyPointer>(ref prop.Header);
var dataValue = IntPtr.Zero;
prop.Data = new IntPtr(&dataValue);
// Free previous application data if any
Device.GetProperty(guid, new IntPtr(&prop));
GCHandle handle;
if (prop.Data.ToInt64() != -1)
{
handle = GCHandle.FromIntPtr(prop.Data);
if (handle.IsAllocated)
{
handle.Free();
}
}
// Set new object value
handle = GCHandle.Alloc(value, GCHandleType.Pinned);
prop.Data = handle.AddrOfPinnedObject();
Device.SetProperty(guid, new IntPtr(&prop));
}
protected unsafe object GetObject(IntPtr guid)
{
// NOT WORKING with APPDATA
var prop = new PropertyPointer();
InitHeader <PropertyPointer>(ref prop.Header);
IntPtr value = IntPtr.Zero;
prop.Data = new IntPtr(&value);
Device.GetProperty(guid, new IntPtr(&prop));
if (prop.Data.ToInt64() == -1)
{
return(null);
}
var handle = GCHandle.FromIntPtr(prop.Data);
if (!handle.IsAllocated)
{
return(null);
}
return(handle.Target);
}
protected unsafe InputRange GetRange(IntPtr guid)
{
var prop = new PropertyRange();
InitHeader <PropertyRange>(ref prop.Header);
Device.GetProperty(guid, new IntPtr(&prop));
return(new InputRange(prop));
}
protected unsafe Guid GetGuid(IntPtr guid)
{
var propNative = new PropertyGuidAndPath.__Native();
InitHeader <PropertyGuidAndPath.__Native>(ref propNative.Header);
Device.GetProperty(guid, new IntPtr(&propNative));
return(propNative.GuidClass);
}
protected unsafe int GetInt(IntPtr guid, int objCode)
{
var prop = new PropertyInt();
InitHeader <PropertyInt>(ref prop.Header);
prop.Header.Obj = objCode;
Device.GetProperty(guid, new IntPtr(&prop));
return(prop.Data);
}
protected unsafe string GetPath(IntPtr guid)
{
var prop = new PropertyGuidAndPath();
var propNative = new PropertyGuidAndPath.__Native();
InitHeader <PropertyGuidAndPath.__Native>(ref propNative.Header);
Device.GetProperty(guid, new IntPtr(&propNative));
prop.__MarshalFrom(ref propNative);
return(prop.Path);
}
protected unsafe string GetString(IntPtr guid, int objectCode)
{
var prop = new PropertyString();
var propNative = new PropertyString.__Native();
InitHeader <PropertyString.__Native>(ref propNative.Header);
propNative.Header.Obj = objectCode;
Device.GetProperty(guid, new IntPtr(&propNative));
prop.__MarshalFrom(ref propNative);
return(prop.Text);
}
