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1 #pragma once
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2
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3 #include <SDK/cfg_var.h>
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4 #if FOOBAR2020
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5 #include <SDK/configStore.h>
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6 #include <mutex>
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7
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8 namespace cfg_var_modern {
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9 template<typename obj_t>
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10 class cfg_obj : public cfg_var_common {
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11 public:
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12 cfg_obj(const GUID& id) : cfg_var_common(id), m_initVal() {}
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13 template<typename arg_t>
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14 cfg_obj(const GUID& id, arg_t&& v) : cfg_var_common(id), m_initVal(std::forward<arg_t>(v)) {}
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15
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16 obj_t get() {
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17 init();
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18 PFC_INSYNC_READ(m_sync);
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19 return m_val;
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20 }
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21 template<typename arg_t>
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22 void set(arg_t&& arg) {
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23 init();
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24 PFC_INSYNC_WRITE(m_sync);
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25 m_val = std::forward<arg_t>(arg);
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26 save();
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27 }
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28 template<typename arg_t>
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29 void operator=(arg_t&& arg) {
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30 set(std::forward<arg_t>(arg));
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31 }
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32 private:
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33 #ifdef FOOBAR2000_HAVE_CFG_VAR_LEGACY
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34 void set_data_raw(stream_reader* p_stream, t_size p_sizehint, abort_callback& p_abort) override {
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35 obj_t o;
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36 try {
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37 stream_reader_formatter<> fmt(*p_stream, p_abort);
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38 fmt >> o;
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39 } catch (...) { return; }
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40 set(std::move(o));
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41 }
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42 #endif
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43 void save() {
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44 // already in write sync
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45 stream_writer_formatter_simple<> out;
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46 out << this->m_val;
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47 fb2k::configStore::get()->setConfigBlob(formatName(), out.m_buffer.get_ptr(), out.m_buffer.get_size());
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48 }
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49 void init() {
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50 std::call_once(m_init, [this] {
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51 obj_t v = m_initVal;
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52 auto blob = fb2k::configStore::get()->getConfigBlob(formatName(), nullptr);
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53 if (blob.is_valid()) {
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54 try {
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55 stream_reader_formatter_simple<> source(blob->data(), blob->size());
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56 source >> v;
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57 } catch (...) {
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58 v = m_initVal; // revert
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59 }
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60 }
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61 PFC_INSYNC_WRITE(m_sync);
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62 m_val = std::move(v);
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63 });
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64 }
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65
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66 pfc::readWriteLock m_sync;
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67 obj_t m_val;
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68 obj_t m_initVal;
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69 std::once_flag m_init;
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70 };
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71 }
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72 #endif // FOOBAR2020 |
