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source: code/trunk/src/libraries/core/object/Context.cc @ 11071

Last change on this file since 11071 was 11071, checked in by landauf, 8 years ago

merged branch cpp11_v3 back to trunk

  • Property svn:eol-style set to native
File size: 3.4 KB
Line 
1/*
2 *   ORXONOX - the hottest 3D action shooter ever to exist
3 *                    > www.orxonox.net <
4 *
5 *
6 *   License notice:
7 *
8 *   This program is free software; you can redistribute it and/or
9 *   modify it under the terms of the GNU General Public License
10 *   as published by the Free Software Foundation; either version 2
11 *   of the License, or (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
18 *   You should have received a copy of the GNU General Public License
19 *   along with this program; if not, write to the Free Software
20 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
21 *
22 *   Author:
23 *      Fabian 'x3n' Landau
24 *   Co-authors:
25 *      ...
26 *
27 */
28
29/**
30    @file
31    @brief Implementation of Context.
32*/
33
34#include "Context.h"
35#include "core/class/Identifier.h"
36#include "core/CoreIncludes.h"
37
38namespace orxonox
39{
40    RegisterClass(Context);
41
42    Context* Context::rootContext_s = nullptr;
43
44    Context* getContextForInitializationOfOtherContexts()
45    {
46        static size_t count = 0;
47        // the first time this is called, ++count returns 1 and the context is created
48        // the second time this is called, ++count returns 2 and nullptr is returned because we're in the constructor of the context itself
49        // for each future call the context (now completely created) is returned
50        if (++count == 2)
51            return nullptr;
52        else
53        {
54            static Context context(nullptr);
55            return &context;
56        }
57    }
58
59    // Initialize Listable(*) with a special context, only used to initialize other contexts. Later in the constructor we change the context
60    Context::Context(Context* context) : Listable(getContextForInitializationOfOtherContexts()), parentContext_(context)
61    {
62        RegisterObject(Context);
63
64        // the context is its own context
65        this->setContext(this);
66    }
67
68    Context::~Context()
69    {
70        // unregister context from object lists before object lists are destroyed
71        this->unregisterObject();
72        for (ObjectListBase* objectList : this->objectLists_)
73            delete objectList;
74    }
75
76    /*static*/ void Context::setRootContext(Context* context)
77    {
78        Context::rootContext_s = context;
79    }
80
81    /*static*/ void Context::destroyRootContext()
82    {
83        delete Context::rootContext_s;
84        Context::rootContext_s = nullptr;
85    }
86
87    /*static*/ Context* Context::getRootContext()
88    {
89        OrxVerify(Context::rootContext_s != nullptr, "Root Context is undefined");
90        return Context::rootContext_s;
91    }
92
93    ObjectListBase* Context::getObjectList(const Identifier* identifier)
94    {
95        unsigned int classID = identifier->getClassID();
96        if (classID >= this->objectLists_.size())
97            this->objectLists_.resize(classID + 1);
98        if (!this->objectLists_[classID])
99            this->objectLists_[classID] = new ObjectListBase();
100        return this->objectLists_[classID];
101    }
102
103    void Context::destroyObjectList(const Identifier* identifier)
104    {
105        ObjectListBase* objectList = this->getObjectList(identifier);
106        delete objectList;
107        this->objectLists_[identifier->getClassID()] = nullptr;
108    }
109}
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