99 lines
2.0 KiB
C++
99 lines
2.0 KiB
C++
#pragma once
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#include <string>
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#include <map>
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#include "../System/String.h"
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class Resource {
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public:
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virtual bool Load(const std::string& filename) = 0;
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protected:
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Resource() : refs(0) {}
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int refs;
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};
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template<class T>
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class ResourceManager
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{
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public:
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ResourceManager() { }
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typedef std::map<std::string, T*> ResourceMap;
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T* Load(const std::string& name) {
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typename ResourceManager<T>::ResourceMap::iterator i = m_resources.find(name);
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if(i == m_resources.end()) {
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T* resource = new T();
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if(!resource->Load(name)) {
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delete resource;
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return NULL;
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}
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resource->refs = 1;
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m_resources.insert(std::pair<std::string, T*>(name, resource));
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return resource;
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}
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i->second->refs++;
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return i->second;
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}
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T* Find(const std::string& name) {
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typename ResourceManager<T>::ResourceMap::iterator i = m_resources.find(name);
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if(i != m_resources.end()) {
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return i->second;
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}
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return NULL;
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}
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void Add(const std::string& name, T* resource) {
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typename ResourceManager<T>::ResourceMap::iterator i = m_resources.find(name);
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if(i == m_resources.end()) {
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resource->refs++;
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m_resources.insert(std::pair<std::string, T*>(name, resource));
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} else {
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i->second->refs++;
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}
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}
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void Destroy(const std::string& name) {
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if(name.empty())
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return;
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typename ResourceManager<T>::ResourceMap::iterator i = m_resources.find(name);
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if(i != m_resources.end()) {
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T* resource = i->second;
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resource->refs--;
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if(resource->m_refs < 1) {
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delete resource;
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m_resources.erase(i);
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}
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}
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}
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void Destroy(T* resource) {
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typename ResourceManager<T>::ResourceMap::iterator i;
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for(i = m_resources.begin(); i != m_resources.end(); ++i) {
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if(i->second == resource){
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resource->refs--;
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if(resource->refs < 1) {
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m_resources.erase(i);
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delete resource;
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}
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return;
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}
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}
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}
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private:
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ResourceMap m_resources;
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};
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