ResourceManager Class Reference

#include <ResourceManager.hxx>

Inheritance diagram for ResourceManager:

Collaboration diagram for ResourceManager:

Classes
struct	AgeIterator
struct	resource_type
struct	ResourceItem

Public Member Functions
	ResourceManager ()
	Creates the ResourceManager. More...
template<typename ResourceID >
resource_type< ResourceID >::type	get (const ResourceID &)
	Fetches and return a Soundtrack. More...
void	prune ()
	Cleans up the cache of unused resources. More...

Private Types
using	MAX_RESOURCE_BYTES = Constant< 150000000 >

Private Attributes
uint32_t	m_Age
uint32_t	m_CacheSize

Additional Inherited Members
Static Public Member Functions inherited from Singleton< ResourceManager >
static ResourceManager &	instance (void)
	Get an instance of the singleton. More...
Protected Member Functions inherited from Singleton< ResourceManager >
	Singleton () noexcept=default
	~Singleton () noexcept=default

Detailed Description

Definition at line 16 of file ResourceManager.hxx.

Member Typedef Documentation

MAX_RESOURCE_BYTES

using ResourceManager::MAX_RESOURCE_BYTES = Constant<150000000>

private

Definition at line 36 of file ResourceManager.hxx.

Constructor & Destructor Documentation

ResourceManager()

ResourceManager::ResourceManager

(

)

Creates the ResourceManager.

Exceptions

ConfigurationError

when loading configuration results in an error

Definition at line 36 of file ResourceManager.cxx.

                                 : m_Age(0), m_CacheSize(0)
{
#ifdef USE_AUDIO
  std::string jsonFileContent = fs::readFileAsString(Settings::instance().audioConfigJSONFile.get());
  json config_json = json::parse(jsonFileContent, nullptr, false);
 
  // check if json file can be parsed
  if (config_json.is_discarded())
    throw ConfigurationError(TRACE_INFO "Error parsing JSON File " + Settings::instance().audioConfigJSONFile.get());
 
  m_audioConfig = config_json;
#endif // USE_AUDIO
}

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Member Function Documentation

get()

template<typename ResourceID >

ResourceManager::resource_type< ResourceID >::type ResourceManager::get

(

const ResourceID &

id

)

Fetches and return a Soundtrack.

Parameters

ResourceID

the id of the resource

Exceptions

AudioError

when loading the file results in an error

Definition at line 14 of file ResourceManager.inl.hxx.

{
  fetch(id);
#ifdef USE_AUDIO
  if constexpr (std::is_same_v<ResourceID, SoundtrackID>)
    return m_soundtracks.at(id).resource;
#endif // USE_AUDIO
}

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prune()

void ResourceManager::prune

(

)

Cleans up the cache of unused resources.

Definition at line 171 of file ResourceManager.cxx.

{
#ifdef USE_AUDIO
  size_t total_size = 0;
  total_size += m_soundtracks.size();
  /* We evict a half of kept resources */
  total_size /= 2;
  std::vector<uint32_t> all_ages;
  using AgeIt = AgeIterator<Mapping<SoundtrackID, SoundtrackResource>::iterator>;
  all_ages.insert<AgeIt>(all_ages.cend(), AgeIterator{m_soundtracks.begin()}, AgeIterator{m_soundtracks.end()});
  std::nth_element(all_ages.begin(), all_ages.begin() + total_size, all_ages.end());
  uint32_t median = all_ages[total_size];
  for (auto it = m_soundtracks.begin(); it != m_soundtracks.end();)
  {
    if (it->second.age < median and !it->second.resource->isPlaying)
    {
      int sizeBytes = 0;
      alGetBufferi(it->second.resource->buffer, AL_SIZE, &sizeBytes);
      m_CacheSize -= sizeof(DecodedAudioData) + sizeof(Soundtrack) + sizeof(SoundtrackUPtr) + sizeBytes;
      it = m_soundtracks.erase(it);
    }
    else
    {
      it->second.age = 0;
      it++;
    }
  }
#endif // USE_AUDIO
  m_Age = 0;
  LOG(LOG_INFO) << "After eviction, cache is " << (m_CacheSize / 1000000) << "MB";
}

Member Data Documentation

m_Age

uint32_t ResourceManager::m_Age

private

Definition at line 32 of file ResourceManager.hxx.

m_CacheSize

uint32_t ResourceManager::m_CacheSize

private

Definition at line 33 of file ResourceManager.hxx.

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The documentation for this class was generated from the following files:

• src/services/ResourceManager.hxx
• src/services/ResourceManager.cxx
• src/services/ResourceManager.inl.hxx