lazyContainerDataSource.h

//
// Copyright 2022 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_IMAGING_HD_LAZY_CONTAINER_DATA_SOURCE_H
#define PXR_IMAGING_HD_LAZY_CONTAINER_DATA_SOURCE_H
 
#include "pxr/imaging/hd/dataSource.h"
 
PXR_NAMESPACE_OPEN_SCOPE
 
class HdLazyContainerDataSource : public HdContainerDataSource
{
public:
    HD_DECLARE_DATASOURCE(HdLazyContainerDataSource);
 
    using Thunk = std::function<HdContainerDataSourceHandle()>;
 
    HD_API
    TfTokenVector GetNames() override;
    HD_API
    HdDataSourceBaseHandle Get(const TfToken &name) override;
 
    HD_API
    ~HdLazyContainerDataSource();
 
protected:
    HD_API
    HdLazyContainerDataSource(const Thunk &thunk);
 
private:
    HdContainerDataSourceHandle _GetSrc();
 
    Thunk _thunk;
    HdContainerDataSourceAtomicHandle _src;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif