initial
git-svn-id: svn://svn.icculus.org/netradiant/trunk@1 61c419a2-8eb2-4b30-bcec-8cead039b335
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rpolzer
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include/modulesystem.h
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258
include/modulesystem.h
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/*
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Copyright (C) 2001-2006, William Joseph.
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All Rights Reserved.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#if !defined(INCLUDED_MODULESYSTEM_H)
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#define INCLUDED_MODULESYSTEM_H
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#include "generic/static.h"
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#include "debugging/debugging.h"
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#if defined(WIN32)
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#define RADIANT_DLLEXPORT __stdcall
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#else
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#define RADIANT_DLLEXPORT
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#endif
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class Module
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{
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public:
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virtual void capture() = 0;
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virtual void release() = 0;
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virtual void* getTable() = 0;
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};
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inline void* Module_getTable(Module& module)
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{
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return module.getTable();
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}
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class TextOutputStream;
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class DebugMessageHandler;
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class ModuleServer
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{
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public:
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class Visitor
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{
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public:
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virtual void visit(const char* name, Module& module) const = 0;
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};
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virtual void setError(bool error) = 0;
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virtual bool getError() const = 0;
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virtual TextOutputStream& getOutputStream() = 0;
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virtual TextOutputStream& getErrorStream() = 0;
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virtual DebugMessageHandler& getDebugMessageHandler() = 0;
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virtual void registerModule(const char* type, int version, const char* name, Module& module) = 0;
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virtual Module* findModule(const char* type, int version, const char* name) const = 0;
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virtual void foreachModule(const char* type, int version, const Visitor& visitor) = 0;
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};
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class ModuleServerHolder
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{
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ModuleServer* m_server;
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public:
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ModuleServerHolder()
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: m_server(0)
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{
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}
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void set(ModuleServer& server)
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{
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m_server = &server;
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}
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ModuleServer& get()
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{
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return *m_server;
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}
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};
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typedef Static<ModuleServerHolder> GlobalModuleServer;
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inline ModuleServer& globalModuleServer()
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{
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return GlobalModuleServer::instance().get();
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}
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inline void initialiseModule(ModuleServer& server)
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{
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GlobalErrorStream::instance().setOutputStream(server.getErrorStream());
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GlobalOutputStream::instance().setOutputStream(server.getOutputStream());
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GlobalDebugMessageHandler::instance().setHandler(server.getDebugMessageHandler());
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GlobalModuleServer::instance().set(server);
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}
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template<typename Type>
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class Modules
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{
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public:
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class Visitor
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{
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public:
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virtual void visit(const char* name, const Type& table) const = 0;
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};
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virtual Type* findModule(const char* name) = 0;
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virtual void foreachModule(const Visitor& visitor) = 0;
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};
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#include "debugging/debugging.h"
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template<typename Type>
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class ModuleRef
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{
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Module* m_module;
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Type* m_table;
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public:
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ModuleRef(const char* name) : m_table(0)
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{
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if(!globalModuleServer().getError())
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{
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m_module = globalModuleServer().findModule(typename Type::Name(), typename Type::Version(), name);
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if(m_module == 0)
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{
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globalModuleServer().setError(true);
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globalErrorStream() << "ModuleRef::initialise: type=" << makeQuoted(typename Type::Name()) << " version=" << makeQuoted(typename Type::Version()) << " name=" << makeQuoted(name) << " - not found\n";
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}
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else
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{
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m_module->capture();
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if(!globalModuleServer().getError())
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{
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m_table = static_cast<Type*>(m_module->getTable());
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}
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}
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}
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}
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~ModuleRef()
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{
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if(m_module != 0)
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{
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m_module->release();
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}
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}
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Type* getTable()
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{
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#if defined(_DEBUG)
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ASSERT_MESSAGE(m_table != 0, "ModuleRef::getTable: type=" << makeQuoted(typename Type::Name()) << " version=" << makeQuoted(typename Type::Version()) << " - module-reference used without being initialised");
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#endif
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return m_table;
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}
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};
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template<typename Type>
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class SingletonModuleRef
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{
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Module* m_module;
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Type* m_table;
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public:
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SingletonModuleRef()
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: m_module(0), m_table(0)
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{
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}
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bool initialised() const
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{
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return m_module != 0;
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}
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void initialise(const char* name)
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{
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m_module = globalModuleServer().findModule(typename Type::Name(), typename Type::Version(), name);
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if(m_module == 0)
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{
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globalModuleServer().setError(true);
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globalErrorStream() << "SingletonModuleRef::initialise: type=" << makeQuoted(typename Type::Name()) << " version=" << makeQuoted(typename Type::Version()) << " name=" << makeQuoted(name) << " - not found\n";
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}
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}
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Type* getTable()
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{
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#if defined(_DEBUG)
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ASSERT_MESSAGE(m_table != 0, "SingletonModuleRef::getTable: type=" << makeQuoted(typename Type::Name()) << " version=" << makeQuoted(typename Type::Version()) << " - module-reference used without being initialised");
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#endif
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return m_table;
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}
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void capture()
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{
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if(initialised())
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{
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m_module->capture();
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m_table = static_cast<Type*>(m_module->getTable());
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}
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}
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void release()
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{
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if(initialised())
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{
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m_module->release();
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}
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}
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};
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template<typename Type>
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class GlobalModule
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{
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static SingletonModuleRef<Type> m_instance;
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public:
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static SingletonModuleRef<Type>& instance()
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{
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return m_instance;
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}
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static Type& getTable()
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{
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return *m_instance.getTable();
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}
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};
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template<class Type>
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SingletonModuleRef<Type> GlobalModule<Type>::m_instance;
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template<typename Type>
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class GlobalModuleRef
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{
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public:
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GlobalModuleRef(const char* name = "*")
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{
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if(!globalModuleServer().getError())
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{
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GlobalModule<Type>::instance().initialise(name);
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}
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GlobalModule<Type>::instance().capture();
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}
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~GlobalModuleRef()
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{
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GlobalModule<Type>::instance().release();
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}
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Type& getTable()
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{
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return GlobalModule<Type>::getTable();
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}
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};
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#endif
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