Method get_default_handle

imperative/src/impl/ops/rng.cpp:114–123

    }

    static Handle get_default_handle(CompNode comp_node) {
        mgb_assert(comp_node.valid());
        MGB_LOCK_GUARD(sm_mtx);
        auto&& glob_handle = glob_default_handles[comp_node];
        if (!glob_handle) {
            glob_handle = inst().do_new_handle(comp_node, glob_default_seed);
        }
        mgb_assert(get_seed(glob_handle) == glob_default_seed);
        return glob_handle;
    }

    static RNGDnnOpManager& inst() {
        static RNGDnnOpManager mgr;