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Replace vector with deque for Component storage

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When reallocating more data, vector moves the original data to a new
buffer. Deque preserves the location of the original data, preventing
invalidated pointers to existing data when additional allocation is
required.
This commit is contained in:
Stephen Seo 2019-11-06 15:47:16 +09:00
parent 4db5e0caed
commit e0da16a63e
1 changed files with 6 additions and 5 deletions
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11
src/EC/Manager.hpp
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@ -12,6 +12,7 @@
#include <cstddef>
#include <vector>
#include <deque>
#include <tuple>
#include <utility>
#include <functional>
@ -67,14 +68,14 @@ namespace EC
template <typename... Types>
struct Storage
{
using type = std::tuple<std::vector<Types>..., std::vector<char> >;
using type = std::tuple<std::deque<Types>..., std::deque<char> >;
};
using ComponentsStorage =
typename EC::Meta::Morph<ComponentsList, Storage<> >::type;
// Entity: isAlive, ComponentsTags Info
using EntitiesTupleType = std::tuple<bool, BitsetType>;
using EntitiesType = std::vector<EntitiesTupleType>;
using EntitiesType = std::deque<EntitiesTupleType>;
EntitiesType entities;
ComponentsStorage componentsStorage;
@ -103,7 +104,7 @@ namespace EC
}
EC::Meta::forEach<ComponentsList>([this, newCapacity] (auto t) {
std::get<std::vector<decltype(t)> >(
std::get<std::deque<decltype(t)> >(
this->componentsStorage).resize(newCapacity);
});
@ -410,10 +411,10 @@ namespace EC
constexpr auto index =
EC::Meta::IndexOf<Component, Components>::value;
// Cast required due to compiler thinking that vector<char> at
// Cast required due to compiler thinking that deque<char> at
// index = Components::size is being used, even if the previous
// if statement will prevent this from ever happening.
(*((std::vector<Component>*)(&std::get<index>(
(*((std::deque<Component>*)(&std::get<index>(
componentsStorage
))))[entityID] = std::move(component);
}