0f2c89b140
* prevent public classes from being created on the stack
- we used to to this by deleting operator delete, but this prevented
the internal "F" classes from being virtual; which can be useful
when using EntityManger::Listener.
now we just make the destructor protected in each class.
- EntityManger::Listener now has a virtual destructor so that
objects could be correctly destroyed from Listener*
* improve EntityManger and Component managers
- all component managers now have the same "base" API
- getComponentCount()
- empty()
- getEntity()
- getEntities()
- Scene now has getEntityCount()
- EntityManager now has getEntityCount()
- all component manager implement gc() the same way, by calling destroy()
- SingleInstanceComponentManager::gc() that calls removeComponent() has
been removed because it's dangerous. removeComponent() is often
not enough, some additional cleanup might be needed.
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <utils/EntityManager.h>
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#include "EntityManagerImpl.h"
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#include <new>
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namespace utils {
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EntityManager::Listener::~Listener() noexcept = default;
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EntityManager::EntityManager()
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: mGens(new uint8_t[RAW_INDEX_COUNT]) {
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// initialize all the generations to 0
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std::fill_n(mGens, RAW_INDEX_COUNT, 0);
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}
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EntityManager::~EntityManager() {
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delete [] mGens;
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}
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EntityManager& EntityManager::get() noexcept {
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// note: we leak the EntityManager because it's more important that it survives everything else
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// the leak is really not a problem because the process is terminating anyway.
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static EntityManagerImpl* instance = new(std::nothrow) EntityManagerImpl;
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return *instance;
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}
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void EntityManager::create(size_t n, Entity* entities) {
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static_cast<EntityManagerImpl *>(this)->create(n, entities);
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}
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void EntityManager::destroy(size_t n, Entity* entities) noexcept {
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static_cast<EntityManagerImpl *>(this)->destroy(n, entities);
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}
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void EntityManager::registerListener(EntityManager::Listener* l) noexcept {
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static_cast<EntityManagerImpl *>(this)->registerListener(l);
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}
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void EntityManager::unregisterListener(EntityManager::Listener* l) noexcept {
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static_cast<EntityManagerImpl *>(this)->unregisterListener(l);
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}
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size_t EntityManager::getEntityCount() const noexcept {
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return static_cast<EntityManagerImpl const *>(this)->getEntityCount();
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}
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#if FILAMENT_UTILS_TRACK_ENTITIES
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std::vector<Entity> EntityManager::getActiveEntities() const {
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return static_cast<EntityManagerImpl const *>(this)->getActiveEntities();
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}
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void EntityManager::dumpActiveEntities(utils::io::ostream& out) const {
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static_cast<EntityManagerImpl const *>(this)->dumpActiveEntities(out);
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}
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#endif
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} // namespace utils
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