mirror of
https://github.com/OpenSpace/OpenSpace.git
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98 lines
3.9 KiB
C++
98 lines
3.9 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2021 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#ifndef __OPENSPACE_CORE___RESOURCESYNCHRONIZATION___H__
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#define __OPENSPACE_CORE___RESOURCESYNCHRONIZATION___H__
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#include <atomic>
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#include <functional>
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#include <memory>
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#include <mutex>
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#include <string>
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#include <unordered_map>
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namespace ghoul { class Dictionary; }
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namespace openspace {
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namespace documentation { struct Documentation; }
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class ResourceSynchronization {
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public:
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enum class State {
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Unsynced,
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Syncing,
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Resolved,
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Rejected
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};
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using CallbackHandle = size_t;
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using StateChangeCallback = std::function<void(State)>;
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static std::unique_ptr<ResourceSynchronization> createFromDictionary(
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const ghoul::Dictionary& dictionary);
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ResourceSynchronization(const ghoul::Dictionary& dictionary);
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virtual ~ResourceSynchronization() = default;
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virtual std::string directory() = 0;
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virtual void start() = 0;
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virtual void cancel() = 0;
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virtual void clear() = 0;
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virtual size_t nSynchronizedBytes() = 0;
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virtual size_t nTotalBytes() = 0;
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virtual bool nTotalBytesIsKnown() = 0;
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virtual float progress();
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State state() const;
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const std::string& name() const;
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bool isResolved() const;
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bool isRejected() const;
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bool isSyncing() const;
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CallbackHandle addStateChangeCallback(StateChangeCallback cb);
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void removeStateChangeCallback(CallbackHandle id);
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static documentation::Documentation Documentation();
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protected:
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void resolve();
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void reject();
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void reset();
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void begin();
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private:
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void setState(State state);
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std::string _name;
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std::atomic<State> _state = State::Unsynced;
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std::mutex _callbackMutex;
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CallbackHandle _nextCallbackId = 0;
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std::unordered_map<CallbackHandle, StateChangeCallback> _stateChangeCallbacks;
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};
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} // namespace openspace
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#endif // __OPENSPACE_CORE___RESOURCESYNCHRONIZATION___H__
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