--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/engine/core/util/resource/pool.cpp	Sun Jun 29 18:44:17 2008 +0000
@@ -0,0 +1,216 @@
+/***************************************************************************
+ *   Copyright (C) 2005-2008 by the FIFE team                              *
+ *   http://www.fifengine.de                                               *
+ *   This file is part of FIFE.                                            *
+ *                                                                         *
+ *   FIFE is free software; you can redistribute it and/or modify          *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 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 General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA              *
+ ***************************************************************************/
+
+// Standard C++ library includes
+
+// 3rd party library includes
+
+// FIFE includes
+// These includes are split up in two parts, separated by one empty line
+// First block: files included from the FIFE root src directory
+// Second block: files included from the same folder
+#include "util/base/exception.h"
+#include "util/log/logger.h"
+
+#include "pool.h"
+
+namespace FIFE {
+	static Logger _log(LM_POOL);
+	
+	Pool::Pool(): 
+		m_entries(),
+		m_listeners(),
+		m_loaders(),
+		m_curind(0)
+	{
+	}
+
+	Pool::~Pool() {
+		clear();
+		std::vector<ResourceLoader*>::iterator loader;
+		for (loader = m_loaders.begin(); loader != m_loaders.end(); loader++) {
+			delete (*loader);
+		}
+	}
+	
+	void Pool::clear() {
+		std::vector<IPoolListener*>::iterator listener;
+		for (listener = m_listeners.begin(); listener != m_listeners.end(); listener++) {
+			(*listener)->poolCleared();
+		}
+		std::vector<PoolEntry*>::iterator entry;
+		for (entry = m_entries.begin(); entry != m_entries.end(); entry++) {
+			delete (*entry);
+		}
+		m_entries.clear();
+	}
+
+	void Pool::addResourceLoader(ResourceLoader* loader) {
+		m_loaders.push_back(loader);
+	}
+
+	int Pool::addResourceFromLocation(const ResourceLocation& loc) {
+		std::vector<PoolEntry*>::iterator it = m_entries.begin();
+		int index = 0;
+		for (; it != m_entries.end(); it++) {
+			ResourceLocation* loc2 = (*it)->location;
+			if (*loc2 == loc) {
+				return index;
+			}
+			index++;
+		}
+		
+		PoolEntry* entry = new PoolEntry();
+		entry->location = loc.clone();
+		m_entries.push_back(entry);
+		index = m_entries.size();
+		return index - 1;
+	}
+
+	int Pool::addResourceFromFile(const std::string& filename) {
+		return addResourceFromLocation(ResourceLocation(filename));
+	}
+
+	IResource& Pool::get(unsigned int index, bool inc) {
+		if (index >= m_entries.size()) {
+			FL_ERR(_log, LMsg("Tried to get with index ") << index << ", only " << m_entries.size() << " items in pool");
+			throw IndexOverflow( __FUNCTION__ );
+		}
+		IResource* res = NULL;
+		PoolEntry* entry = m_entries[index];
+		if (entry->resource) {
+			res = entry->resource;
+		} else {
+			if (!entry->loader) {
+				findAndSetProvider(*entry);
+			} else {
+				entry->resource = entry->loader->loadResource(*entry->location);
+			}
+			if (!entry->loader) {
+				LMsg msg("No suitable loader was found for resource ");
+				msg << entry->location->getFilename();
+				FL_ERR(_log, msg);
+				throw NotFound(msg.str);
+			}
+			if (!entry->resource) {
+				LMsg msg("No loader was able to load the requested resource ");
+				msg << entry->location->getFilename();
+				FL_ERR(_log, msg);
+				throw NotFound(msg.str);
+			}
+			res = entry->resource;
+		}
+		if (inc) {
+			res->addRef();
+		}
+		res->setPoolId(index);
+		return *res;
+	}
+	
+	unsigned int Pool::getIndex(const std::string& filename) {
+		std::vector<PoolEntry*>::iterator it = m_entries.begin();
+		int index = 0;
+		
+		// look for the appropriate entry
+		for (; it != m_entries.end(); it++) {
+			
+				if ((*it)->location->getFilename() == filename) {
+					return index;
+				}
+			index++;
+		}
+		
+		// create resource
+		return addResourceFromFile(filename);
+	}
+
+	void Pool::release(unsigned int index, bool dec) {
+		if (index >= m_entries.size()) {
+			throw IndexOverflow( __FUNCTION__ );
+		}
+
+		IResource* res = NULL;
+		PoolEntry* entry = m_entries[index];
+		if (entry->resource) {
+			res = entry->resource;
+			if (dec) {
+				res->decRef();
+			}
+			if(res->getRefCount() == 0) {
+				delete entry->resource;
+				entry->resource = 0;
+			}
+		}
+	}
+
+	int Pool::getResourceCount(int status) {
+		int amount = 0;
+		std::vector<PoolEntry*>::iterator entry;
+		for (entry = m_entries.begin(); entry != m_entries.end(); entry++) {
+			if (status & RES_LOADED) {
+				if ((*entry)->resource) {
+					amount++;
+				}
+			}
+			if (status & RES_NON_LOADED) {
+				if (!(*entry)->resource) {
+					amount++;
+				}
+			}
+		}
+		return amount;
+	}
+
+	void Pool::addPoolListener(IPoolListener* listener) {
+		m_listeners.push_back(listener);
+	}
+
+	void Pool::removePoolListener(IPoolListener* listener) {
+		std::vector<IPoolListener*>::iterator i = m_listeners.begin();
+		while (i != m_listeners.end()) {
+			if ((*i) == listener) {
+				m_listeners.erase(i);
+				return;
+			}
+			++i;
+		}
+	}
+
+	void Pool::findAndSetProvider(PoolEntry& entry) {
+		std::vector<ResourceLoader*>::iterator it = m_loaders.begin();
+		std::vector<ResourceLoader*>::iterator end = m_loaders.end();
+		if( it == end ) {
+			FL_PANIC(_log, "no loader constructors given for resource pool");
+		}
+		for(; it != end; ++it) {
+			IResource* res = (*it)->loadResource(*entry.location);
+			if (res) {
+				entry.resource = res;
+				entry.loader = *it;
+				return;
+			}
+		};
+	}
+
+	void Pool::printStatistics() {
+		FL_LOG(_log, LMsg("Pool size =") << m_entries.size());
+	}
+}