Common: added ProxyDataBlob class

Common/CMakeLists.txt

@@ -34,6 +34,7 @@ set(INTERFACE
     interface/SpinLock.hpp
     interface/STDAllocator.hpp
     interface/StringDataBlobImpl.hpp
+    interface/ProxyDataBlob.hpp
     interface/StringTools.h
     interface/StringTools.hpp
     interface/StringPool.hpp

Common/interface/ProxyDataBlob.hpp

@@ -0,0 +1,98 @@
+/*
+ *  Copyright 2024 Diligent Graphics LLC
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence),
+ *  contract, or otherwise, unless required by applicable law (such as deliberate
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental,
+ *  or consequential damages of any character arising as a result of this License or
+ *  out of the use or inability to use the software (including but not limited to damages
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and
+ *  all other commercial damages or losses), even if such Contributor has been advised
+ *  of the possibility of such damages.
+ */
+
+#pragma once
+
+/// \file
+/// Implementation for the IDataBlob interface
+
+#include "../../Primitives/interface/BasicTypes.h"
+#include "../../Primitives/interface/DataBlob.h"
+#include "ObjectBase.hpp"
+#include "RefCntAutoPtr.hpp"
+
+namespace Diligent
+{
+
+/// Implementation of the proxy data blob that does not own the data
+class ProxyDataBlob : public ObjectBase<IDataBlob>
+{
+public:
+    typedef ObjectBase<IDataBlob> TBase;
+
+    ProxyDataBlob(IReferenceCounters* pRefCounters, void* pData, size_t Size) :
+        TBase{pRefCounters},
+        m_pData{pData},
+        m_pConstData{pData},
+        m_Size{Size}
+    {}
+
+    ProxyDataBlob(IReferenceCounters* pRefCounters, const void* pData, size_t Size) :
+        TBase{pRefCounters},
+        m_pData{nullptr},
+        m_pConstData{pData},
+        m_Size{Size}
+    {}
+
+    template <typename... ArgsType>
+    static RefCntAutoPtr<ProxyDataBlob> Create(ArgsType&&... Args)
+    {
+        return RefCntAutoPtr<ProxyDataBlob>{MakeNewRCObj<ProxyDataBlob>()(std::forward<ArgsType>(Args)...)};
+    }
+
+    IMPLEMENT_QUERY_INTERFACE_IN_PLACE(IID_DataBlob, TBase)
+
+    /// Sets the size of the internal data buffer
+    virtual void DILIGENT_CALL_TYPE Resize(size_t NewSize) override
+    {
+        UNEXPECTED("Resize is not supported by proxy data blob.");
+    }
+
+    /// Returns the size of the internal data buffer
+    virtual size_t DILIGENT_CALL_TYPE GetSize() const override
+    {
+        return m_Size;
+    }
+
+    /// Returns the pointer to the internal data buffer
+    virtual void* DILIGENT_CALL_TYPE GetDataPtr() override
+    {
+        return m_pData;
+    }
+
+    /// Returns the pointer to the internal data buffer
+    virtual const void* DILIGENT_CALL_TYPE GetConstDataPtr() const override
+    {
+        return m_pConstData;
+    }
+
+private:
+    void* const       m_pData;
+    const void* const m_pConstData;
+    const size_t      m_Size;
+};
+
+} // namespace Diligent

Common/interface/StringDataBlobImpl.hpp

@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019-2023 Diligent Graphics LLC
+ *  Copyright 2019-2024 Diligent Graphics LLC
  *  Copyright 2015-2019 Egor Yusov
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
@@ -40,11 +40,11 @@
 namespace Diligent
 {
 
-/// Base interface for a file stream
-class StringDataBlobImpl : public Diligent::ObjectBase<IDataBlob>
+/// String data blob implementation.
+class StringDataBlobImpl : public ObjectBase<IDataBlob>
 {
 public:
-    typedef Diligent::ObjectBase<IDataBlob> TBase;
+    typedef ObjectBase<IDataBlob> TBase;
 
     template <typename... ArgsType>
     StringDataBlobImpl(IReferenceCounters* pRefCounters, ArgsType&&... Args) :