pipeline->run();这个run起来之后，如果中途想停下来，怎么办？有没stop的接口？ about cgraph HOT 5 CLOSED

bool g_bRunning = true;

class MyStopAspect : public GAspect {
public:
    CStatus beginRun() override {
        CStatus status;
        if (!g_bRunning) {
            status.setStatus("stop");   // 遇到异常状况，设置异常返回信息
        }
        return status;
    }
};


void demo() {
    GPipelinePtr pipeline = GPipelineFactory::create();
    GElementPtr a, b, c, d = nullptr;
    CStatus status;

    CStatus status = pipeline->registerGElement<MyNode1>(&a, {}, "nodeA");
    status += pipeline->registerGElement<MyNode2>(&b, {a}, "nodeB");
    status += pipeline->registerGElement<MyNode1>(&c, {a}, "nodeC");
    status += pipeline->registerGElement<MyNode2>(&d, {b, c}, "nodeD");
    pipeline->addGAspect<MyStopAspect>({a,b,c,d});    // 给每个算子，加上切面，确保在g_bRunning = false的时候，不继续执行

    pipeline->process();
    GPipelineFactory::remove(pipeline);
}