Add ptr versions of forMatchingSignature fns
This commit is contained in:
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2 changed files with 426 additions and 2 deletions
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@ -514,6 +514,18 @@ namespace EC
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);
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}
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template <typename CType, typename Function>
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static void callPtr(
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const std::size_t& entityID,
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CType& ctype,
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Function* function)
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{
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(*function)(
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entityID,
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ctype.template getEntityData<Types>(entityID)...
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);
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}
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template <typename CType, typename Function>
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void callInstance(
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const std::size_t& entityID,
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@ -525,6 +537,18 @@ namespace EC
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ctype,
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std::forward<Function>(function));
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}
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template <typename CType, typename Function>
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void callInstancePtr(
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const std::size_t& entityID,
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CType& ctype,
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Function* function) const
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{
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ForMatchingSignatureHelper<Types...>::callPtr(
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entityID,
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ctype,
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function);
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}
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};
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public:
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@ -632,6 +656,112 @@ namespace EC
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}
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}
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/*!
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\brief Calls the given function on all Entities matching the given
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Signature.
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The function pointer given to this function must accept std::size_t
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as its first parameter and Component references for the rest of the
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parameters. Tags specified in the Signature are only used as
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filters and will not be given as a parameter to the function.
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The second parameter is default 1 (not multi-threaded). If the
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second parameter threadCount is set to a value greater than 1, then
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threadCount threads will be used.
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Note that multi-threading is based on splitting the task of calling
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the function across sections of entities. Thus if there are only
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a small amount of entities in the manager, then using multiple
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threads may not have as great of a speed-up.
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Example:
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\code{.cpp}
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auto function = [] (std::size_t ID, C0& component0,
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C1& component1) {
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// Lambda function contents here
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};
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manager.forMatchingSignaturePtr<TypeList<C0, C1, T0>>(
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&function, // ptr
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4 // four threads
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);
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\endcode
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Note, the ID given to the function is not permanent. An entity's ID
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may change when cleanup() is called.
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*/
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template <typename Signature, typename Function>
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void forMatchingSignaturePtr(Function* function,
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std::size_t threadCount = 1)
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{
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using SignatureComponents =
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typename EC::Meta::Matching<Signature, ComponentsList>::type;
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using Helper =
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EC::Meta::Morph<
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SignatureComponents,
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ForMatchingSignatureHelper<> >;
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BitsetType signatureBitset =
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BitsetType::template generateBitset<Signature>();
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if(threadCount <= 1)
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{
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for(std::size_t i = 0; i < currentSize; ++i)
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{
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if(!std::get<bool>(entities[i]))
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{
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continue;
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}
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if((signatureBitset & std::get<BitsetType>(entities[i]))
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== signatureBitset)
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{
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Helper::callPtr(i, *this, function);
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}
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}
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}
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else
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{
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std::vector<std::thread> threads(threadCount);
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std::size_t s = currentSize / threadCount;
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for(std::size_t i = 0; i < threadCount; ++i)
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{
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std::size_t begin = s * i;
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std::size_t end;
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if(i == threadCount - 1)
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{
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end = currentSize;
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}
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else
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{
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end = s * (i + 1);
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}
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threads[i] = std::thread([this, &function, &signatureBitset]
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(std::size_t begin,
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std::size_t end) {
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for(std::size_t i = begin; i < end; ++i)
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{
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if(!std::get<bool>(this->entities[i]))
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{
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continue;
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}
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if((signatureBitset
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& std::get<BitsetType>(entities[i]))
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== signatureBitset)
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{
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Helper::callPtr(i, *this, function);
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}
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}
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},
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begin,
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end);
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}
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for(std::size_t i = 0; i < threadCount; ++i)
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{
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threads[i].join();
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}
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}
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}
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private:
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std::unordered_map<std::size_t, std::function<void(std::size_t)> >
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forMatchingFunctions;
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@ -712,7 +842,7 @@ namespace EC
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& std::get<BitsetType>(this->entities[i]))
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== signatureBitset)
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{
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helper.callInstance(i, *this, function);
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helper.callInstancePtr(i, *this, &function);
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}
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}
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}
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@ -746,7 +876,7 @@ namespace EC
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& std::get<BitsetType>(this->entities[i]))
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== signatureBitset)
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{
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helper.callInstance(i, *this, function);
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helper.callInstancePtr(i, *this, &function);
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}
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}
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},
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@ -1151,6 +1281,190 @@ namespace EC
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});
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}
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/*!
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\brief Call multiple functions with mulitple signatures on all
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living entities.
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(Living entities as in entities that have not been marked for
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deletion.)
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Note that this function requires the tuple of functions to hold
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pointers to functions, not just functions.
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This function requires the first template parameter to be a
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EC::Meta::TypeList of signatures. Note that a signature is a
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EC::Meta::TypeList of components and tags, meaning that SigList
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is a TypeList of TypeLists.
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The second template parameter can be inferred from the function
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parameter which should be a tuple of functions. The function
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at any index in the tuple should match with a signature of the
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same index in the SigList. Behavior is undefined if there are
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less functions than signatures.
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See the Unit Test of this function in src/test/ECTest.cpp for
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usage examples.
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This function was created for the use case where there are many
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entities in the system which can cause multiple calls to
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forMatchingSignature to be slow due to the overhead of iterating
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through the entire list of entities on each invocation.
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This function instead iterates through all entities once,
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storing matching entities in a vector of vectors (for each
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signature and function pair) and then calling functions with
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the matching list of entities.
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Note that multi-threaded or not, functions will be called in order
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of signatures. The first function signature pair will be called
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first, then the second, third, and so on.
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If this function is called with more than 1 thread specified, then
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the order of entities called is not guaranteed. Otherwise entities
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will be called in consecutive order by their ID.
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*/
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template <typename SigList, typename FuncTuple>
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void forMatchingSignaturesPtr(FuncTuple funcTuple,
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std::size_t threadCount = 1)
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{
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std::vector<std::vector<std::size_t> > multiMatchingEntities(
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SigList::size);
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BitsetType signatureBitsets[SigList::size];
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// generate bitsets for each signature
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EC::Meta::forEach<SigList>(
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[this, &signatureBitsets] (auto signature) {
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signatureBitsets[
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EC::Meta::IndexOf<decltype(signature), SigList>{} ] =
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BitsetType::template generateBitset<decltype(signature)>();
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});
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// find and store entities matching signatures
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if(threadCount <= 1)
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{
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for(std::size_t eid = 0; eid < currentSize; ++eid)
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{
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if(!isAlive(eid))
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{
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continue;
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}
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for(std::size_t i = 0; i < SigList::size; ++i)
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{
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if((signatureBitsets[i]
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& std::get<BitsetType>(entities[eid]))
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== signatureBitsets[i])
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{
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multiMatchingEntities[i].push_back(eid);
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}
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}
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}
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}
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else
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{
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std::vector<std::thread> threads(threadCount);
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std::size_t s = currentSize / threadCount;
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std::mutex sigsMutexes[SigList::size];
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for(std::size_t i = 0; i < threadCount; ++i)
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{
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std::size_t begin = s * i;
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std::size_t end;
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if(i == threadCount - 1)
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{
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end = currentSize;
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}
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else
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{
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end = s * (i + 1);
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}
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threads[i] = std::thread(
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[this, &signatureBitsets, &multiMatchingEntities,
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&sigsMutexes]
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(std::size_t begin, std::size_t end) {
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for(std::size_t eid = begin; eid < end; ++eid)
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{
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if(!isAlive(eid))
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{
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continue;
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}
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for(std::size_t i = 0; i < SigList::size; ++i)
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{
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if((signatureBitsets[i]
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& std::get<BitsetType>(entities[eid]))
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== signatureBitsets[i])
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{
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std::lock_guard<std::mutex> guard(
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sigsMutexes[i]);
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multiMatchingEntities[i].push_back(eid);
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}
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}
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}
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},
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begin, end);
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}
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for(std::size_t i = 0; i < threadCount; ++i)
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{
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threads[i].join();
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}
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}
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// call functions on matching entities
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EC::Meta::forEach<SigList>(
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[this, &multiMatchingEntities, &funcTuple, &threadCount]
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(auto signature) {
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using SignatureComponents =
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typename EC::Meta::Matching<
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decltype(signature), ComponentsList>::type;
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using Helper =
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EC::Meta::Morph<
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SignatureComponents,
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ForMatchingSignatureHelper<> >;
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using Index = EC::Meta::IndexOf<decltype(signature),
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SigList>;
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constexpr std::size_t index = Index{};
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if(threadCount <= 1)
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{
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for(auto iter = multiMatchingEntities[index].begin();
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iter != multiMatchingEntities[index].end(); ++iter)
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{
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Helper::callPtr(*iter, *this,
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std::get<index>(funcTuple));
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}
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}
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else
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{
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std::vector<std::thread> threads(threadCount);
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std::size_t s = multiMatchingEntities[index].size()
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/ threadCount;
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for(std::size_t i = 0; i < threadCount; ++i)
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{
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std::size_t begin = s * i;
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std::size_t end;
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if(i == threadCount - 1)
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{
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end = multiMatchingEntities[index].size();
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}
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else
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{
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end = s * (i + 1);
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}
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threads[i] = std::thread(
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[this, &multiMatchingEntities, &funcTuple]
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(std::size_t begin, std::size_t end)
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{
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for(std::size_t j = begin; j < end; ++j)
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{
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Helper::callPtr(multiMatchingEntities[index][j],
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*this, std::get<index>(funcTuple));
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}
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}, begin, end);
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}
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for(std::size_t i = 0; i < threadCount; ++i)
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{
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threads[i].join();
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}
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}
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});
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}
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/*!
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\brief Resets the Manager, removing all entities.
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@ -791,3 +791,113 @@ TEST(EC, ForMatchingSignatures)
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}
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}
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TEST(EC, forMatchingPtrs)
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{
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EC::Manager<ListComponentsAll, ListTagsAll> manager;
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std::size_t e[] = {
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manager.addEntity(),
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manager.addEntity(),
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manager.addEntity(),
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manager.addEntity(),
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manager.addEntity(),
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manager.addEntity(),
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manager.addEntity()
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};
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auto& first = e[0];
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auto& last = e[6];
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for(auto eid : e)
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{
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if(eid != first && eid != last)
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{
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manager.addComponent<C0>(eid);
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manager.addComponent<C1>(eid);
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}
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else
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{
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manager.addComponent<C0>(eid);
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manager.addTag<T0>(eid);
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}
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}
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const auto func0 = [] (std::size_t eid, C0& c0, C1& c1)
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{
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c0.x = 1;
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c0.y = 2;
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c1.vx = 3;
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c1.vy = 4;
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};
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const auto func1 = [] (std::size_t eid, C0& c0)
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{
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c0.x = 11;
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c0.y = 12;
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};
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using namespace EC::Meta;
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manager.forMatchingSignaturePtr<TypeList<C0, C1> >(
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&func0
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);
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manager.forMatchingSignaturePtr<TypeList<C0, T0> >(
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&func1
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);
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for(auto eid : e)
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{
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if(eid != first && eid != last)
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{
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C0& c0 = manager.getEntityData<C0>(eid);
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EXPECT_EQ(1, c0.x);
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EXPECT_EQ(2, c0.y);
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c0.x = 0;
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c0.y = 0;
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C1& c1 = manager.getEntityData<C1>(eid);
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EXPECT_EQ(3, c1.vx);
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EXPECT_EQ(4, c1.vy);
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c1.vx = 0;
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c1.vy = 0;
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}
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else
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{
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C0& c = manager.getEntityData<C0>(eid);
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EXPECT_EQ(11, c.x);
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EXPECT_EQ(12, c.y);
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c.x = 0;
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c.y = 0;
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}
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}
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manager.forMatchingSignaturesPtr<TypeList<
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TypeList<C0, C1>,
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TypeList<C0, T0> > >(
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std::make_tuple(&func0, &func1)
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);
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for(auto eid : e)
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{
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if(eid != first && eid != last)
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{
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C0& c0 = manager.getEntityData<C0>(eid);
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EXPECT_EQ(1, c0.x);
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EXPECT_EQ(2, c0.y);
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c0.x = 0;
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c0.y = 0;
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C1& c1 = manager.getEntityData<C1>(eid);
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EXPECT_EQ(3, c1.vx);
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EXPECT_EQ(4, c1.vy);
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c1.vx = 0;
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c1.vy = 0;
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}
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else
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{
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C0& c = manager.getEntityData<C0>(eid);
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EXPECT_EQ(11, c.x);
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EXPECT_EQ(12, c.y);
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c.x = 0;
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c.y = 0;
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}
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}
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}
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