private void InjectDependency(AssetDescriptor parent, AssetDescriptor dependedDesc)
{
using (Key.Lock(assets, assetDependencies)) {
// Add the asset as a dependency of the parent asset
List <AssetDescriptor> dependencies = assetDependencies.Get(parent, null);
if (dependencies == null)
{
dependencies = new List <AssetDescriptor>();
assetDependencies.Add(parent, dependencies);
}
dependencies.Add(dependedDesc);
// If the asset is already loaded, increase its ref count
if (IsLoaded(dependedDesc))
{
IReferencedObject ro = assets[dependedDesc];
++ro.RefCount;
IncrementRefCountedDependencies(dependedDesc);
}
else
{
// Else, add a new task to load it
AddTask(dependedDesc);
}
}
}
/// <summary>
/// Returns the asset associated with the specified path.
/// Throws an AssetNotLoadedException if no asset is found.
/// </summary>
public T Get <T>(string path, IAssetLoaderParameters param = null)
{
Type type = typeof(T);
if (type == null)
{
throw new AssetNotLoadedException(typeof(T), path);
}
using (Key.Lock(assets)) {
IReferencedObject ro = assets.Get(new AssetDescriptor(type, path, param), null);
if (ro == null)
{
throw new AssetNotLoadedException(typeof(T), path);
}
object result = ro.Asset;
if (result == null)
{
throw new AssetNotLoadedException(typeof(T), path);
}
return((T)result);
}
}
protected ObjectReferenceBase(IReferencedObject referent)
{
id = ++LastId;
isDisposed = false;
this.Referent = referent;
if (Logger.Instance.LogLevel >= Logger.LogLevels.Development)
{
Logger.Instance.WriteDevToLog("Creating " + this.ToString());
_instantiationTrace = new StackTrace(0, true);
}
referent.AddReference();
}
private void IncrementRefCountedDependencies(AssetDescriptor parent)
{
if (!assetDependencies.ContainsKey(parent))
{
return;
}
foreach (AssetDescriptor dependency in assetDependencies[parent])
{
IReferencedObject ro = assets[dependency];
++ro.RefCount;
IncrementRefCountedDependencies(dependency);
}
}
//
// Methods used to dispose loaded assets
//
#region Dispose Methods
private void DisposeDependencies(AssetDescriptor desc)
{
if (assetDependencies.ContainsKey(desc))
{
foreach (AssetDescriptor dependency in assetDependencies[desc])
{
DisposeDependencies(dependency);
}
}
if (assets.ContainsKey(desc))
{
IReferencedObject ro = assets[desc];
Dispose(ro.Asset);
}
}
/// <summary>
/// Returns the asset associated with the specified path.
/// Throws an AssetNotLoadedException if no asset is found.
/// </summary>
public object Get(Type type, string path)
{
using (Key.Lock(assets)) {
IReferencedObject ro = assets.Get(new AssetDescriptor(type, path), null);
if (ro == null)
{
throw new AssetNotLoadedException(type, path);
}
object result = ro.Asset;
if (result == null)
{
throw new AssetNotLoadedException(type, path);
}
return(result);
}
}
private void NextTask()
{
AssetDescriptor descriptor = loadQueue.Dequeue();
if (IsLoaded(descriptor))
{
IReferencedObject asset = assets[descriptor];
++asset.RefCount;
IncrementRefCountedDependencies(descriptor);
if (descriptor.Params != null)
{
descriptor.Params.FireOnLoaded(this, descriptor);
}
++loaded;
}
else
{
AddTask(descriptor);
}
}
public int GetRefCount <T>(T asset)
{
if (asset == null)
{
throw new ArgumentNullException("asset");
}
using (Key.Lock(assets)) {
foreach (AssetDescriptor desc in assets.Keys)
{
IReferencedObject ro = assets[desc];
if (ro.Asset.Equals(asset))
{
return(ro.RefCount);
}
}
return(0);
}
}
/// <summary>
/// Returns the asset specified by the descriptor.
/// Throws an AssetNotLoadedException if no asset is found.
/// </summary>
public object Get(AssetDescriptor descriptor)
{
if (descriptor == null)
{
throw new ArgumentNullException("descriptor");
}
using (Key.Lock(assets)) {
IReferencedObject ro = assets.Get(descriptor, null);
if (ro == null)
{
throw new AssetNotLoadedException(descriptor);
}
object result = ro.Asset;
if (result == null)
{
throw new AssetNotLoadedException(descriptor);
}
return(result);
}
}
/// <summary>
/// Unloads the asset associated with the specified path.
/// If there are no references left to the asset, it is removed and destroyed, if needed.
/// </summary>
public void Unload(AssetDescriptor desc)
{
using (Key.Lock(loadQueue, taskStack, assets)) {
// Check if the asset is not scheduled for loading first
int foundIndex = -1;
for (int i = 0; i < loadQueue.Count; ++i)
{
if (loadQueue[i].Path == desc.Path)
{
foundIndex = i;
break;
}
}
if (foundIndex != -1)
{
--toLoad;
loadQueue.RemoveAt(foundIndex);
return;
}
if (taskStack.Count > 0)
{
AssetLoadingTask task = taskStack[0];
if (task.AssetDesc.Path == desc.Path)
{
task.Cancel();
return;
}
}
if (!assets.ContainsKey(desc))
{
return;
}
IReferencedObject ro = assets[desc];
// Decrement reference count, and get rid of the asset if there are no references left
--ro.RefCount;
if (ro.RefCount <= 0)
{
Dispose(ro.Asset);
assets.Remove(desc);
}
// Remove any dependencies (or just decrement their ref count)
if (assetDependencies.ContainsKey(desc))
{
foreach (AssetDescriptor dependency in assetDependencies[desc])
{
if (IsLoaded(dependency.Type, dependency.Path))
{
Unload(dependency.Type, dependency.Path);
}
}
}
// Remove dependencies if ref count <= 0
if (ro.RefCount <= 0)
{
assetDependencies.Remove(desc);
}
}
}
public TestObjectReference(IReferencedObject referent) : base(referent)
{
}
