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-rw-r--r--ingen/QueuedInterface.hpp66
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-/*
- This file is part of Ingen.
- Copyright 2018 David Robillard <http://drobilla.net/>
-
- Ingen is free software: you can redistribute it and/or modify it under the
- terms of the GNU Affero General Public License as published by the Free
- Software Foundation, either version 3 of the License, or any later version.
-
- Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- A PARTICULAR PURPOSE. See the GNU Affero General Public License for details.
-
- You should have received a copy of the GNU Affero General Public License
- along with Ingen. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifndef INGEN_ENGINE_QUEUEDINTERFACE_HPP
-#define INGEN_ENGINE_QUEUEDINTERFACE_HPP
-
-#include <mutex>
-#include <vector>
-
-#include "ingen/Interface.hpp"
-#include "ingen/Message.hpp"
-
-namespace Ingen {
-
-/** Stores all messages and emits them to a sink on demand.
- *
- * This can be used to make an interface thread-safe.
- */
-class QueuedInterface : public Interface
-{
-public:
- explicit QueuedInterface(SPtr<Interface> sink) : _sink(std::move(sink)) {}
-
- URI uri() const override { return URI("ingen:/QueuedInterface"); }
-
- void message(const Message& message) override {
- std::lock_guard<std::mutex> lock(_mutex);
- _messages.emplace_back(message);
- }
-
- void emit() {
- std::vector<Message> messages;
- {
- std::lock_guard<std::mutex> lock(_mutex);
- _messages.swap(messages);
- }
-
- for (const auto& i : messages) {
- _sink->message(i);
- }
- }
-
- const SPtr<Interface>& sink() const { return _sink; }
-
-private:
- std::mutex _mutex;
- SPtr<Interface> _sink;
- std::vector<Message> _messages;
-};
-
-} // namespace Ingen
-
-#endif // INGEN_ENGINE_QUEUEDINTERFACE_HPP