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source: code/trunk/src/libraries/core/module/Plugin.cc @ 11703

Last change on this file since 11703 was 11071, checked in by landauf, 9 years ago

merged branch cpp11_v3 back to trunk

  • Property svn:eol-style set to native
File size: 4.1 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#include "Plugin.h"
30
31#include "ModuleInstance.h"
32#include "util/Output.h"
33#include "core/Core.h"
34#include "StaticInitializationManager.h"
35
36namespace orxonox
37{
38    Plugin::Plugin(const std::string& name, const std::string& libraryName) : name_(name), libraryName_(libraryName)
39    {
40        this->referenceCounter_ = 0;
41        this->moduleInstance_ = nullptr;
42    }
43
44    Plugin::~Plugin()
45    {
46        // force unloading of the module when the plugin is destroyed
47        if (this->moduleInstance_ != nullptr)
48            this->unloadModule();
49    }
50
51    void Plugin::reference()
52    {
53        this->referenceCounter_++;
54        if (this->referenceCounter_ == 1) // increased from 0 to 1 -> load plugin
55            this->load();
56        else
57            orxout(internal_info) << "Increased reference count for plugin " << this->name_ << " to " << this->referenceCounter_ << endl;
58    }
59
60    void Plugin::dereference(bool bMerelyDeactivate)
61    {
62        if (this->referenceCounter_ == 0)
63        {
64            orxout(internal_warning) << "Tried to dereference plugin " << this->name_ << " more often than it was referenced" << endl;
65            return;
66        }
67
68        this->referenceCounter_--;
69        if (this->referenceCounter_ == 0) // reduced from 1 to 0 -> load plugin
70            this->unload(bMerelyDeactivate);
71        else
72            orxout(internal_info) << "Reduced reference count for plugin " << this->name_ << " to " << this->referenceCounter_ << endl;
73    }
74
75    //////////////////////////////////////////
76    //                 LOAD                 //
77    //////////////////////////////////////////
78    void Plugin::load()
79    {
80        // only load module if it isn't already loaded. otherwise merely activate it.
81        if (this->moduleInstance_ == nullptr)
82            this->loadModule();
83        else
84            this->activateModule();
85    }
86    void Plugin::loadModule()
87    {
88        orxout(internal_info) << "Loading plugin " << this->name_ << "..." << endl;
89        this->moduleInstance_ = new ModuleInstance(this->libraryName_);
90        Core::getInstance().loadModule(this->moduleInstance_);
91    }
92    void Plugin::activateModule()
93    {
94        orxout(internal_info) << "Activating plugin " << this->name_ << "..." << endl;
95        StaticInitializationManager::getInstance().loadModule(this->moduleInstance_);
96    }
97
98    //////////////////////////////////////////
99    //                UNLOAD                //
100    //////////////////////////////////////////
101    void Plugin::unload(bool bMerelyDeactivate)
102    {
103        // fully unload the module unless otherwise requested.
104        if (bMerelyDeactivate)
105            this->deactivateModule();
106        else
107            this->unloadModule();
108    }
109    void Plugin::unloadModule()
110    {
111        orxout(internal_info) << "Unloading plugin " << this->name_ << "..." << endl;
112        Core::getInstance().unloadModule(this->moduleInstance_);
113        delete this->moduleInstance_;
114        this->moduleInstance_ = nullptr;
115    }
116    void Plugin::deactivateModule()
117    {
118        orxout(internal_info) << "Deactivating plugin " << this->name_ << "..." << endl;
119        StaticInitializationManager::getInstance().unloadModule(this->moduleInstance_);
120    }
121}
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