74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
#pragma once
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#ifndef FSPP_FUSE_IDLIST_H_
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#define FSPP_FUSE_IDLIST_H_
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#include <map>
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#include <memory>
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#include <mutex>
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#include <stdexcept>
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#include "messmer/cpp-utils/macros.h"
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namespace fspp {
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template<class Entry>
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class IdList {
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public:
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IdList();
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virtual ~IdList();
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int add(std::unique_ptr<Entry> entry);
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Entry *get(int id);
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const Entry *get(int id) const;
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void remove(int id);
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private:
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std::map<int, std::unique_ptr<Entry>> _entries;
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int _id_counter;
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mutable std::mutex _mutex;
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DISALLOW_COPY_AND_ASSIGN(IdList<Entry>)
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};
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template<class Entry>
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IdList<Entry>::IdList()
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: _entries(), _id_counter(0), _mutex() {
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}
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template<class Entry>
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IdList<Entry>::~IdList() {
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}
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template<class Entry>
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int IdList<Entry>::add(std::unique_ptr<Entry> entry) {
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std::lock_guard<std::mutex> lock(_mutex);
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//TODO Reuse IDs (ids = descriptors)
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int new_id = ++_id_counter;
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_entries[new_id] = std::move(entry);
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return new_id;
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}
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template<class Entry>
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Entry *IdList<Entry>::get(int id) {
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return const_cast<Entry*>(const_cast<const IdList<Entry>*>(this)->get(id));
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}
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template<class Entry>
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const Entry *IdList<Entry>::get(int id) const {
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std::lock_guard<std::mutex> lock(_mutex);
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const Entry *result = _entries.at(id).get();
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return result;
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}
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template<class Entry>
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void IdList<Entry>::remove(int id) {
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std::lock_guard<std::mutex> lock(_mutex);
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auto found_iter = _entries.find(id);
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if (found_iter == _entries.end()) {
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throw std::out_of_range("Called IdList::remove() with an invalid ID");
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}
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_entries.erase(found_iter);
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}
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} /* namespace fspp */
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#endif /* FSPP_FUSE_IDLIST_H_ */
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