Method Allocate

BG3Extender/GameDefinitions/EntitySystem.cpp:142–163

void* FrameAllocator::Allocate(uint16_t size)
{
    auto realSize = (uint16_t)(size + 63) & 0xFFC0u;

    auto curPage = CurrentPage;
    auto offset = (uint64_t)InterlockedExchangeAdd64(&curPage->Offset, realSize);
    while (offset + realSize > PageSize) {

        EnterCriticalSection(&CS);
        if (curPage == CurrentPage) {
            auto page = AllocPage();
            page->Offset = 0x40;
            CurrentPage = page;
        }
        LeaveCriticalSection(&CS);

        curPage = CurrentPage;
        offset = (uint64_t)InterlockedExchangeAdd64(&curPage->Offset, realSize);
    }

    return (uint8_t*)curPage + offset;
}

FrameAllocator::FrameBuffer* FrameAllocator::AllocPage()
{