Method stop

fdbserver/coroimpl/CoroFlowCoro.actor.cpp:228–256

			pool->queueLock.leave();
	}
	Future<Void> stop(Error const& e) override {
		if (error.code() == invalid_error_code) {
			error = e;
		}

		pool->queueLock.enter();
		TraceEvent("WorkPool_Stop")
		    .errorUnsuppressed(e)
		    .detail("Workers", pool->workers.size())
		    .detail("Idle", pool->idle.size())
		    .detail("Work", pool->work.size());

		for (uint32_t i = 0; i < pool->work.size(); i++)
			pool->work[i]->cancel(); // What if cancel() does something to this?
		pool->work.clear();
		for (int i = 0; i < pool->workers.size(); i++)
			pool->workers[i]->stop = true;

		std::vector<Worker*> idle;
		std::swap(idle, pool->idle);
		pool->queueLock.leave();

		for (int i = 0; i < idle.size(); i++)
			idle[i]->unblock();

		pool->allStopped.add(Void());

		return pool->allStopped.getResult();
	}
	bool isCoro() const override { return IS_CORO; }
	void addref() override { ReferenceCounted<WorkPool>::addref(); }
	void delref() override { ReferenceCounted<WorkPool>::delref(); }