57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
#include "interned_string.hh"
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namespace Kakoune
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{
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InternedString StringRegistry::acquire(StringView str)
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{
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auto it = m_slot_map.find(str);
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if (it == m_slot_map.end())
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{
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size_t slot;
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if (not m_free_slots.empty())
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{
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slot = m_free_slots.back();
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m_free_slots.pop_back();
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m_storage[slot] = DataAndRefCount({str.begin(), str.end()}, 1);
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}
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else
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{
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slot = m_storage.size();
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m_storage.push_back(DataAndRefCount({str.begin(), str.end()}, 1));
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}
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// Create a new string view that point to the storage data
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StringView storage_view{m_storage[slot].first.data(), (int)m_storage[slot].first.size()};
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m_slot_map[storage_view] = slot;
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return InternedString{storage_view, slot};
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}
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size_t slot = it->second;
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auto& data = m_storage[slot];
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++data.second;
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return {{data.first.data(), (int)data.first.size()}, slot};
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}
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void StringRegistry::acquire(size_t slot)
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{
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kak_assert(slot < m_storage.size());
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kak_assert(m_storage[slot].second > 0);
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++m_storage[slot].second;
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}
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void StringRegistry::release(size_t slot)
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{
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if (--m_storage[slot].second == 0)
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{
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m_free_slots.push_back(slot);
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std::vector<char>& data = m_storage[slot].first;
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auto it = m_slot_map.find(StringView{data.data(), (int)data.size()});
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kak_assert(it != m_slot_map.end());
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m_slot_map.erase(it);
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data.clear();
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}
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}
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}
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