46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
// Copyright (c) Facebook, Inc. and its affiliates.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <folly/Synchronized.h>
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#include <vector>
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namespace yarpl {
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namespace observable {
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class Subscription {
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public:
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virtual ~Subscription() = default;
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virtual void cancel();
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bool isCancelled() const;
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// Adds ability to tie another subscription to this instance.
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// Whenever *this subscription is cancelled then all tied subscriptions get
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// cancelled as well
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void tieSubscription(std::shared_ptr<Subscription> subscription);
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static std::shared_ptr<Subscription> create(std::function<void()> onCancel);
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static std::shared_ptr<Subscription> create(std::atomic_bool& cancelled);
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static std::shared_ptr<Subscription> create();
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protected:
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std::atomic<bool> cancelled_{false};
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folly::Synchronized<std::vector<std::shared_ptr<Subscription>>>
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tiedSubscriptions_;
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};
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} // namespace observable
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} // namespace yarpl
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