Method ReallocWithinBlock

include/vk_mem_alloc.h:12714–12770

}

bool VmaDefragmentationContext_T::ReallocWithinBlock(VmaBlockVector& vector, VmaDeviceMemoryBlock* block)
{
    VmaBlockMetadata* metadata = block->m_pMetadata;

    for (VmaAllocHandle handle = metadata->GetAllocationListBegin();
        handle != VK_NULL_HANDLE;
        handle = metadata->GetNextAllocation(handle))
    {
        MoveAllocationData moveData = GetMoveData(handle, metadata);
        // Ignore newly created allocations by defragmentation algorithm
        if (moveData.move.srcAllocation->GetUserData() == this)
            continue;
        switch (CheckCounters(moveData.move.srcAllocation->GetSize()))
        {
        case CounterStatus::Ignore:
            continue;
        case CounterStatus::End:
            return true;
        case CounterStatus::Pass:
            break;
        default:
            VMA_ASSERT(0);
        }

        VkDeviceSize offset = moveData.move.srcAllocation->GetOffset();
        if (offset != 0 && metadata->GetSumFreeSize() >= moveData.size)
        {
            VmaAllocationRequest request = {};
            if (metadata->CreateAllocationRequest(
                moveData.size,
                moveData.alignment,
                false,
                moveData.type,
                VMA_ALLOCATION_CREATE_STRATEGY_MIN_OFFSET_BIT,
                &request))
            {
                if (metadata->GetAllocationOffset(request.allocHandle) < offset)
                {
                    if (vector.CommitAllocationRequest(
                        request,
                        block,
                        moveData.alignment,
                        moveData.flags,
                        this,
                        moveData.type,
                        &moveData.move.dstTmpAllocation) == VK_SUCCESS)
                    {
                        m_Moves.push_back(moveData.move);
                        if (IncrementCounters(moveData.size))
                            return true;
                    }
                }
            }
        }
    }
    return false;
}