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60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
#pragma once
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#include <mutex>
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#include <optional>
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#include <string>
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#include <vector>
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#ifndef BUFFER_SIZE
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#define BUFFER_SIZE = 128
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#endif
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#ifndef NAME_LENGTH
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#define NAME_LENGTH = 128
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#endif
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using OptionalNumber = std::optional<std::size_t>;
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using BufferEntry = std::pair<OptionalNumber, const char*>;
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class NameBuffer {
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public:
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static inline BufferEntry Add(const std::string& name) {
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return getBuffer().add(name);
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}
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static inline const char* Get(std::size_t index) {
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return getBuffer().get(index);
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}
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private:
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NameBuffer() : m_buffer(BUFFER_SIZE, nullptr), m_index(0ul) {
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for (std::size_t index = 0ul, end = m_buffer.size(); index < end; ++index)
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m_buffer[index] = new char[NAME_LENGTH];
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}
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std::mutex m_mutex;
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std::vector<char*> m_buffer;
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std::size_t m_index;
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static inline NameBuffer& getBuffer() {
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static NameBuffer buffer;
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return buffer;
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}
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BufferEntry add(const std::string& name) {
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std::lock_guard<std::mutex> lock(m_mutex);
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if (m_index >= BUFFER_SIZE || name.size() > NAME_LENGTH)
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return std::make_pair(std::nullopt, nullptr);
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auto index = m_index++;
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name.copy(m_buffer[index], name.size());
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return std::make_pair(index, m_buffer[index]);
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}
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const char* get(std::size_t index) {
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std::lock_guard<std::mutex> lock(m_mutex);
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if (index >= BUFFER_SIZE) return nullptr;
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return m_buffer[index];
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}
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};
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