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December 17, 2015 02:53
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Resource Management
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| #include "Thales/Resource.h" | |
| #include <string.h> | |
| namespace Thales { | |
| ResourceManager::ResourceManager(IResourceFinder* finder) | |
| : m_Finder(finder) | |
| { | |
| for (int i = 0; i < MAX_TYPE_COUNT; ++i) | |
| m_Factories[i] = NULL; | |
| } | |
| ResourceManager::~ResourceManager() | |
| { | |
| } | |
| void ResourceManager::addFactory(IResourceFactory* factory) | |
| { | |
| int i; | |
| for (i = 0; i < MAX_TYPE_COUNT; ++i) { | |
| if (m_Factories[i] == NULL) | |
| break; | |
| } | |
| THALES_ASSERT(i < MAX_TYPE_COUNT); | |
| m_Factories[i] = factory; | |
| factory->setTypeID(i); | |
| factory->setResourceFinder(m_Finder); | |
| } | |
| void ResourceManager::removeFactory(IResourceFactory* factory) | |
| { | |
| for (i = 0; i < MAX_TYPE_COUNT; ++i) { | |
| if (m_Factories[i] == factory) | |
| m_Factories[i] = NULL; | |
| } | |
| factory->setTypeID(0xFFu); | |
| factory->setResourceFinder(NULL); | |
| } | |
| IResourceFactory* ResourceManager::findFactory(const char* type) | |
| { | |
| IResourceFactory* factory = NULL; | |
| for (i = 0; i < MAX_TYPE_COUNT; ++i) { | |
| if (strcmp(m_Factories[i]->type(), type) == 0) { | |
| factory = m_Factories[i]; | |
| break; | |
| } | |
| } | |
| return factory; | |
| } | |
| ResourceHandle ResourceManager::retain(ResourceName name) | |
| { | |
| IResourceFactory* factory = NULL; | |
| for (int i = 0; i < MAX_TYPE_COUNT; ++i) { | |
| if (m_Finder->compareType(name, m_Factories[i]->type())) { | |
| factory = m_Factories[i]; | |
| } | |
| } | |
| if (!factory) | |
| return {0,0,0}; | |
| ResourceHandle res = factory->find(name); | |
| if (valid(res)) { | |
| factory->retain(res); | |
| THALES_ASSERT(res.type == i); | |
| return res; | |
| } | |
| res = factory->create(name); | |
| if (valid(res)) { | |
| THALES_ASSERT(res.type == i); | |
| return res; | |
| } | |
| return { 0, 0, 0 }; | |
| } | |
| void ResourceManager::release(ResourceHandle res) | |
| { | |
| THALES_ASSERT(valid(res)); | |
| m_Factories[res.type]->release(res); | |
| } | |
| bool ResourceManager::valid(ResourceHandle res) | |
| { | |
| if (res.version != 0 && res.type < (unsigned)MAX_TYPE_COUNT) { | |
| IResourceFactory* factory = m_Factories[res.type]; | |
| if (factory) | |
| return factory->valid(res); | |
| } | |
| return false; | |
| } | |
| ResourceStatus ResourceManager::status(ResourceHandle res) | |
| { | |
| return m_Factories[res.type]->status(res); | |
| } | |
| bool ResourceManager::load(ResourceHandle res) | |
| { | |
| return m_Factories[res.type]->load(res); | |
| } | |
| bool ResourceManager::unload(ResourceHandle res) | |
| { | |
| return m_Factories[res.type]->unload(res); | |
| } | |
| } |
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| // -*- C++ -*- | |
| namespace Thales { | |
| struct ResourceName { | |
| uint32_t uuid[4]; | |
| }; | |
| struct ResourceHandle { | |
| uint8_t type; | |
| uint8_t version; | |
| uint16_t index; | |
| }; | |
| enum class ResourceStatus { | |
| UNKNOWN = 0, | |
| UNLOADED, | |
| LOADING, | |
| LOADED, | |
| UNLOADING, | |
| }; | |
| class IResourceFinder { | |
| public: | |
| virtual bool exist(ResourceName) = 0; | |
| virtual bool compareType(ResourceName, const char* type) = 0; | |
| virtual IFile* open(ResourceName) = 0; | |
| }; | |
| class IResourceFactory { | |
| friend class ResourceManager; | |
| public: | |
| virtual const char* type() const = 0; | |
| virtual ResourceStatus status(ResourceHandle) const = 0; | |
| virtual bool valid(ResourceHandle) const = 0; | |
| virtual ResourceHandle create(ResourceName) = 0; | |
| virtual ResourceHandle find(ResourceName) = 0; | |
| virtual void retain(ResourceHandle) = 0; | |
| virtual void release(ResourceHandle) = 0; | |
| virtual bool load(ResourceHandle) = 0; | |
| virtual bool unload(ResourceHandle) = 0; | |
| protected: | |
| virtual void setTypeID(uint8_t tid) = 0; | |
| virtual void setResourceFinder(IResourceFinder*) = 0; | |
| }; | |
| class ResourceManager { | |
| public: | |
| ResourceManager(IResourceFinder* finder); | |
| ~ResourceManager(); | |
| // ResourceManager doesn't own factories | |
| // Callers (sub-systems) are responsible to create/delete factories | |
| void addFactory(IResourceFactory*); | |
| void removeFactory(IResourceFactory*); | |
| IResourceFactory* findFactory(const char* type); | |
| ResourceHandle retain(ResourceName); | |
| void release(ResourceHandle); | |
| bool valid(ResourceHandle); | |
| ResourceStatus status(ResourceHandle); | |
| bool load(ResourceHandle); | |
| bool unload(ResourceHandle); | |
| private: | |
| IResourceFinder* m_Finder; | |
| private: | |
| static constexpr int MAX_TYPE_COUNT = 64; | |
| IResourceFactory* m_Factories[MAX_TYPE_COUNT]; | |
| }; | |
| } |
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