59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
#pragma once
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#include <string>
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#include <shared_mutex>
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#include <fstream>
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#include "../../../core/world/forward.h"
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#include "../../../core/world/Voxel.hpp"
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#include "../../../core/data/mem.hpp"
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#include "../../../core/utils/zctx.hpp"
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#include "../../../core/data/math.hpp"
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namespace world::server {
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///Group of chunks saved as a single file in memory
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class MemoryRegion {
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public:
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MemoryRegion(const std::string& folderPath, const area_<region_pos> &pos);
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~MemoryRegion();
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template<typename D>
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void averages(D &out) {
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std::shared_lock lock(mutex);
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out.resize(content.size() * (sizeof(region_chunk_pos) + sizeof(Voxel)));
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data::in_view in((uint8_t*)out.data(), out.size());
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for(const auto& r: content) {
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if (r.second.average.has_value()) {
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in.write((const uint8_t*)&r.first, sizeof(r.first));
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in.write((const uint8_t*)&r.second.average.value(), sizeof(r.second.average.value()));
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}
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}
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out.resize(in.cur);
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}
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bool read(const region_chunk_pos &pos, const zstd::read_ctx &ctx, std::vector<char> &out);
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void write(const region_chunk_pos &pos, const zstd::write_ctx& ctx, const std::string_view &in, const std::optional<Voxel>& average);
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private:
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void save(bool force = true);
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std::string path;
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//TODO: use tickets to remove unused regions
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enum Flags: unsigned char {
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ZERO = 0,
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HAS_AVERAGE = 1 << 0,
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EMPTY = 1 << 1
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};
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std::shared_mutex mutex;
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struct node {
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node(const std::optional<Voxel>& a, std::unique_ptr<std::vector<char>> d):
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average(a), data(std::move(d)) { }
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std::optional<Voxel> average;
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std::unique_ptr<std::vector<char>> data;
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};
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robin_hood::unordered_map<region_chunk_pos, node> content;
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bool changed = false;
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void load();
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};
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} |