Method Allocate

util/memory/mmapalloc.cpp:10–19

    class TMmapAllocator: public IAllocator {
    public:
        TBlock Allocate(size_t len) override {
            TMappedAllocation m(len + sizeof(TMappedAllocation));
            TMappedAllocation* real = (TMappedAllocation*)m.Data();

            (new (real) TMappedAllocation(0))->swap(m);

            TBlock ret = {real + 1, len};

            return ret;
        }

        void Release(const TBlock& block) override {
            TMappedAllocation tmp(0);