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Shallow Copying of the pMeshData in CreateMeshContainer

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When I make a shallow copy of pMeshData to OriginalMesh (for static mesh rendering, 2 objects pointing to one COM interface, memory leaks start to occur.
When I don't, everything is fine.
How to solve it? I addref() to it once (with pMeshData)
and ReleaseCOM it once in destroyMeshContainer
Jack Edited by lucky6969b

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HRESULT CAllocMeshHierarchy::CreateMeshContainer(PCTSTR Name,
const D3DXMESHDATA* pMeshData, const D3DXMATERIAL* pMaterials,
const D3DXEFFECTINSTANCE* pEffectInstances, DWORD NumMaterials,
const DWORD *pAdjacency, ID3DXSkinInfo* pSkinInfo,
D3DXMESHCONTAINER** ppNewMeshContainer)
// Remark: CreateMeshContainer should always return a non-null value
// for ppNewMeshContainer, even if we are not interested in the mesh
// (i.e., it contains no skin info), otherwise D3DXLoadMeshHierarchyFromX
// will interpret it as a failed operation.

// Allocate a new D3DXMESHCONTAINER, and set its name.
MeshContainer* meshContainer = new MeshContainer();
::ZeroMemory(meshContainer, sizeof(D3DXMESHCONTAINER));
if( Name ) CopyString(Name, &meshContainer->Name);
else CopyString("<no name>", &meshContainer->Name);

// Copy material data, and allocate memory for texture file names.
meshContainer->NumMaterials = NumMaterials;
meshContainer->pMaterials = new D3DXMATERIAL[NumMaterials];
for(DWORD i = 0; i < NumMaterials; ++i)
D3DXMATERIAL* mtrls = meshContainer->pMaterials;
mtrls.MatD3D = pMaterials.MatD3D;
mtrls.MatD3D.Ambient = pMaterials.MatD3D.Diffuse;
// Ignore effect instances and adjacency info for this demo.
meshContainer->pEffects = 0;
meshContainer->pAdjacency = 0;

// Save mesh and skininfo.
meshContainer->MeshData.Type = D3DXMESHTYPE_MESH;
meshContainer->MeshData.pMesh = pMeshData->pMesh;
meshContainer->OriginalMesh = pMeshData->pMesh;
meshContainer->pSkinInfo = pSkinInfo;
if (pSkinInfo)

// Save our created mesh container now because we might return
// early, and we must _always_ return an allocated container.
*ppNewMeshContainer = meshContainer;
return D3D_OK;

HRESULT CAllocMeshHierarchy::DestroyMeshContainer(D3DXMESHCONTAINER* pMeshContainer)
MeshContainer *pMeshContainerBase = (MeshContainer*) pMeshContainer;
delete[] pMeshContainerBase->Name;
delete[] pMeshContainerBase->pAdjacency;
delete[] pMeshContainerBase->pEffects;

for(DWORD i = 0; i < pMeshContainerBase->NumMaterials; ++i)
delete[] pMeshContainerBase->pMaterials.pTextureFilename;
delete[] pMeshContainerBase->pMaterials;


delete pMeshContainerBase;

return D3D_OK;

If you mean to Release a COM object twice, I am afraid that doesn't work.

MeshData.pMesh is 0x00000000 while OriginalMesh is a pointer of some value whose values are 0xfeeefeee

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