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77 linhas
2.3 KiB
77 linhas
2.3 KiB
#include <stdint.h>
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#ifdef COMPILE_TIME
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#include "9float.hpp"
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using scatter_key_t = ninefloat::Q<uint64_t,64>;
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static const scatter_key_t scatter_key_increment = ninefloat::Q<uint64_t,64>::min_increment();
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#else
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using scatter_key_t = uint64_t;
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static const scatter_key_t scatter_key_increment = 1;
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#endif
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#include <vector>
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namespace StorageTree{
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namespace _impl{
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template<class childs>
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struct subdivision
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{
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uint64_t weight;
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std::vector<childs> content;
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scatter_key_t begin;
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scatter_key_t end;
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static const bool divisible = true;
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};
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struct daemon_impl{
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uint64_t weight;
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scatter_key_t begin;
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scatter_key_t end;
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static const bool divisible = false;
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};
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template<class T>
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constexpr T max(T any = 0)
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{
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if(any>any+scatter_key_increment)
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return any
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return max(any+scatter_key_increment);
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}
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}
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using daemon = _impl::daemon_impl;
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using server = _impl::subdivision<daemon>;
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using subrack = _impl::subdivision<server>;
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using rack = _impl::subdivision<subrack>;
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using room = _impl::subdivision<rack>;
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using datacenter = _impl::subdivision<room>;
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using root = _impl::subdivision<datacenter>;
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template<class T, std::enable_if_t<T::divisible>>
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void update_weights(T& root, uint64_t sub_ratio=1, scatter_key_t begin=0, scatter_key_t end=_impl::max<scatter_key_t>())
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{
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scatter_key_t address_space = end-begin;
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scatter_key_t base = begin
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for(int idx=0:idx<root.content.size();idx++)
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{
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auto& elem = root.content[idx];
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if(idx!=root.content.size()-1)
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{
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update_weights(elem, root.content.size()*sub_ratio, base, base+address_space/root.content.size());
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base = base+address_space/root.content.size()+scatter_key_increment;
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}
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else
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update_weights(elem, root.content.size()*sub_ratio, base, end);
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}
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}
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template<class T, std::enable_if_t<!T::divisible>>
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void update_weights(T& root, scatter_key_t begin, scatter_key_t end)
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{
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this->begin = begin;
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this->end = end;
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}
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}
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