minetest/src/activeobjectmgr.h

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/*
Minetest
Copyright (C) 2010-2018 nerzhul, Loic BLOT <loic.blot@unix-experience.fr>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <map>
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#include <memory>
#include <vector>
#include "debug.h"
#include "irrlichttypes.h"
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#include "util/basic_macros.h"
class TestClientActiveObjectMgr;
class TestServerActiveObjectMgr;
template <typename T>
class ActiveObjectMgr
{
friend class ::TestClientActiveObjectMgr;
friend class ::TestServerActiveObjectMgr;
public:
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ActiveObjectMgr() = default;
DISABLE_CLASS_COPY(ActiveObjectMgr);
virtual ~ActiveObjectMgr()
{
SANITY_CHECK(m_active_objects.empty());
// Note: Do not call clear() here. The derived class is already half
// destructed.
}
virtual void step(float dtime, const std::function<void(T *)> &f) = 0;
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virtual bool registerObject(std::unique_ptr<T> obj) = 0;
virtual void removeObject(u16 id) = 0;
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void clear()
{
while (!m_active_objects.empty())
removeObject(m_active_objects.begin()->first);
}
T *getActiveObject(u16 id)
{
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auto it = m_active_objects.find(id);
return it != m_active_objects.end() ? it->second.get() : nullptr;
}
std::vector<u16> getAllIds() const
{
std::vector<u16> ids;
ids.reserve(m_active_objects.size());
for (auto &it : m_active_objects) {
ids.push_back(it.first);
}
return ids;
}
protected:
u16 getFreeId() const
{
// try to reuse id's as late as possible
static thread_local u16 last_used_id = 0;
u16 startid = last_used_id;
while (!isFreeId(++last_used_id)) {
if (last_used_id == startid)
return 0;
}
return last_used_id;
}
bool isFreeId(u16 id) const
{
return id != 0 && m_active_objects.find(id) == m_active_objects.end();
}
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// ordered to fix #10985
// Note: ActiveObjects can access the ActiveObjectMgr. Only erase objects using
// removeObject()!
std::map<u16, std::unique_ptr<T>> m_active_objects;
};