Function __divmod

include/stdexec/__detail/__task.hpp:69–72

    };

    constexpr size_t __divmod(size_t __total_size, size_t __chunk_size) noexcept
    {
      return (__total_size / __chunk_size) + (__total_size % __chunk_size != 0);
    }

    struct alignas(__STDCPP_DEFAULT_NEW_ALIGNMENT__) __memblock
    {