Method Validate

modules/engine/graphics/src/d3d12/D3D12MemAlloc.cpp:3180–3263

}

bool BlockMetadata_Generic::Validate() const
{
    D3D12MA_VALIDATE(!m_Suballocations.empty());

    // Expected offset of new suballocation as calculated from previous ones.
    UINT64 calculatedOffset = 0;
    // Expected number of free suballocations as calculated from traversing their list.
    UINT calculatedFreeCount = 0;
    // Expected sum size of free suballocations as calculated from traversing their list.
    UINT64 calculatedSumFreeSize = 0;
    // Expected number of free suballocations that should be registered in
    // m_FreeSuballocationsBySize calculated from traversing their list.
    size_t freeSuballocationsToRegister = 0;
    // True if previous visited suballocation was free.
    bool prevFree = false;

    for (const auto& subAlloc : m_Suballocations)
    {
        // Actual offset of this suballocation doesn't match expected one.
        D3D12MA_VALIDATE(subAlloc.offset == calculatedOffset);

        const bool currFree = (subAlloc.type == SUBALLOCATION_TYPE_FREE);
        // Two adjacent free suballocations are invalid. They should be merged.
        D3D12MA_VALIDATE(!prevFree || !currFree);

        const Allocation* const alloc = (Allocation*)subAlloc.privateData;
        if (!IsVirtual())
        {
            D3D12MA_VALIDATE(currFree == (alloc == NULL));
        }

        if (currFree)
        {
            calculatedSumFreeSize += subAlloc.size;
            ++calculatedFreeCount;
            if (subAlloc.size >= MIN_FREE_SUBALLOCATION_SIZE_TO_REGISTER)
            {
                ++freeSuballocationsToRegister;
            }

            // Margin required between allocations - every free space must be at least that large.
            D3D12MA_VALIDATE(subAlloc.size >= GetDebugMargin());
        }
        else
        {
            if (!IsVirtual())
            {
                D3D12MA_VALIDATE(alloc->GetOffset() == subAlloc.offset);
                D3D12MA_VALIDATE(alloc->GetSize() == subAlloc.size);
            }

            // Margin required between allocations - previous allocation must be free.
            D3D12MA_VALIDATE(GetDebugMargin() == 0 || prevFree);
        }

        calculatedOffset += subAlloc.size;
        prevFree = currFree;
    }