void OnPeek(MetaResourceBase resource)
{
#if LOG_CONTENT_ACQUIRE
log.Write("p " +
//(ob != null ? ob.GetHashCode().ToString() : "null").PadRight(14) +
" " + resource);
#endif
}
void OnResetAcquire(MetaResourceBase resource, object ob)
{
#if LOG_CONTENT
log.Write("r+ " +
(ob != null ? ob.GetHashCode().ToString() : "null").PadRight(14) +
" " + resource);
#endif
}
static void VerifyMetaResourceType(MetaResourceBase metaResource)
{
if (metaResource == null)
{
return;
}
VerifyMetaResourceType(metaResource.GetType(), (error) => { throw new Exception(error); });
}
static void VerifyMetaResourceClone(MetaResourceBase metaResource)
{
if (metaResource == null)
{
return;
}
VerifyMetaResourceClone(metaResource, (MetaResourceBase)metaResource.Clone());
}
void OnDestroy(MetaResourceBase resource, object ob)
{
#if LOG_CONTENT
log.Write("- " +
(ob != null ? ob.GetHashCode().ToString() : "null").PadRight(14) +
" " + resource);
#endif
#if CONTENT_STATISTICS
pcNumberOfObjects.Decrement();
#endif
}
void OnAcquire(MetaResourceBase resource)
{
#if LOG_CONTENT_ACQUIRE
log.Write("a " +
//(ob != null ? ob.GetHashCode().ToString() : "null").PadRight(14) +
" " + resource);
#endif
#if CONTENT_STATISTICS
pcTotalNumberOfReferences.Increment();
#endif
}
void OnConstruct(MetaResourceBase resource, object ob)
{
#if LOG_CONTENT
log.Write("+ " +
(ob != null ? ob.GetHashCode().ToString() : "null").PadRight(14) + " " +
(ob != null ? ob.GetType().Name : "null").PadRight(14) +
" " + resource);
#endif
#if CONTENT_STATISTICS
pcNumberOfObjects.Increment();
#endif
}
/// <summary>
/// Returns the requested resource, specified by the MetaResource. The resource
/// has to be Released once it's no longer used.
/// </summary>
public T Acquire <T>(MetaResourceBase metaResource) where T : class
{
VerifyMetaResource(metaResource);
if (resetting)
{
return(ResetAcquire <T>(metaResource));
}
else
{
return(InnerAcquire <T>(metaResource));
}
}
/// <summary>
/// Temporary acquire of an object which does not need to be Released
/// The object can only be guaranteed to be valid until the next Prune
/// </summary>
public T Peek <T>(MetaResourceBase metaResource) where T : class
{
if (metaResource == null)
{
return(default(T));
}
OnPeek(metaResource);
VerifyMetaResource(metaResource);
// This is a small optimization, just see if the last acquired object was the same as this one,
// in that case return it. Turns out often around half the acquires can be handled like this
if (Object.Equals(lastAcquiredMetaResource, metaResource))
{
lastAcquiredResource.LastAcquired = pruneK;
return((T)lastAcquiredResource.Object);
}
var key = new Common.Tuple <MetaResourceBase, Type>(metaResource, typeof(T));
Resource o = null;
#if THREAD_SAFE_CONTENT
lock (lockObject)
#endif
if (contentByMetaResourceAndType.TryGetValue(key, out o))
{
o.LastAcquired = pruneK;
key.First = (MetaResourceBase)metaResource.Clone();
lastAcquiredMetaResource = key;
lastAcquiredResource = o;
return((T)o.Object);
}
T ob;
if (resetting)
{
ob = ResetAcquire <T>(metaResource);
}
else
{
ob = Acquire <T>(metaResource);
}
Release(ob);
return(ob);
}
T ResetAcquire <T>(MetaResourceBase metaResource) where T : class
{
if (metaResource == null)
{
return(default(T));
}
var key = new Common.Tuple <MetaResourceBase, Type>((MetaResourceBase)metaResource.Clone(), typeof(T));
Resource o;
// This object has already been reset
if (resetResourcesById.TryGetValue(key, out o))
{
return((T)o.Object);
}
// This resource doesn't exists yet, create it
bool ok = false;
#if THREAD_SAFE_CONTENT
lock (lockObject)
#endif
ok = contentByMetaResourceAndType.TryGetValue(key, out o);
if (!ok)
{
return(InnerAcquire <T>(metaResource));
}
var mapperKey = new Common.Tuple <Type, Type>(o.MetaResource.GetType(), o.Object.GetType());
o.Object = mappers[mapperKey].Do(MetaResourceDo.ResetDevice, o.MetaResource, this, o.Object);
OnResetAcquire(o.MetaResource, o.Object);
#if THREAD_SAFE_CONTENT
lock (lockObject)
#endif
contentByResource.Add(o.Object, o);
resetResourcesById.Add(key, o);
return((T)o.Object);
}
static void VerifyMetaResourceClone(MetaResourceBase original, MetaResourceBase copy)
{
bool equals = Object.Equals(original, copy);
foreach (var v in original.GetType().GetProperties())
{
if (typeof(MetaResourceBase).IsAssignableFrom(v.PropertyType))
{
var o = (MetaResourceBase)((MetaResourceBase)v.GetValue(original, null));
if (o != null)
{
var c = (MetaResourceBase)o.Clone();
VerifyMetaResourceClone(o, c);
}
}
}
if (!equals)
{
throw new Exception(original + " does not equal " + copy);
}
}
static void VerifyMetaResource(MetaResourceBase metaResource)
{
VerifyMetaResourceType(metaResource);
VerifyMetaResourceClone(metaResource);
}
T InnerAcquire <T>(MetaResourceBase metaResource) where T : class
{
if (metaResource == null)
{
return(default(T));
}
var key = new Common.Tuple <MetaResourceBase, Type>(metaResource, typeof(T));
// This is a small optimization, just see if the last acquired object was the same as this one,
// in that case return it. Turns out often around half the acquires can be handled like this
if (Object.Equals(lastAcquiredMetaResource, metaResource))
{
OnAcquire(metaResource);
lastAcquiredResource.References++;
lastAcquiredResource.LastAcquired = pruneK;
return((T)lastAcquiredResource.Object);
}
Resource o = null;
#if THREAD_SAFE_CONTENT
lock (lockObject)
{
#endif
if (contentByMetaResourceAndType.TryGetValue(key, out o))
{
OnAcquire(metaResource);
o.References++;
o.LastAcquired = pruneK;
key.First = (MetaResourceBase)metaResource.Clone();
lastAcquiredMetaResource = key;
lastAcquiredResource = o;
return((T)o.Object);
}
key.First = (MetaResourceBase)metaResource.Clone();
#if DEBUG_CONTENT
if (key.First.GetHashCode() != metaResource.GetHashCode())
{
throw new Exception("Error in meta resource Clone or GetHashCode");
}
if (!Object.Equals(key.First, metaResource))
{
string diffs = "";
key.First.ReportEqualsDiffs(metaResource, (d) => diffs += "\n" + d);
throw new Exception("Error in meta resource Clone or Equals\n\nDiffs:\n" + diffs);
}
#endif
var mapperKey = new Common.Tuple <Type, Type>(metaResource.GetType(), typeof(T));
object ob = mappers[mapperKey].Do(MetaResourceDo.Construct, metaResource, this, null);
OnConstruct(metaResource, ob);
if (ob == null)
{
lastAcquiredMetaResource = new Common.Tuple <MetaResourceBase, Type>(null, null);
lastAcquiredResource = null;
return((T)ob);
}
#if DEBUG_CONTENT
if (key.First.GetHashCode() != metaResource.GetHashCode())
{
throw new Exception("MetaResource was changed during construction (No longer the same hash code)");
}
if (!Object.Equals(key.First, metaResource))
{
throw new Exception("MetaResource was changed during construction (No longer Equals)");
}
#endif
#if THREAD_SAFE_CONTENT
//lock (lockObject)
//{
#endif
OnAcquire(metaResource);
contentByMetaResourceAndType.Add(key, o = new Resource
{
MetaResource = metaResource,
Object = ob,
References = 1,
LastAcquired = pruneK,
FirstAcquired = pruneK
});
#if DEBUG_CONTENT
Resource debugR;
if (contentByResource.TryGetValue(o.Object, out debugR))
{
throw new Exception("Content by resource old: " + debugR.MetaResource + " new: " + o.MetaResource);
}
#endif
contentByResource.Add(o.Object, o);
#if THREAD_SAFE_CONTENT
}
#endif
lastAcquiredMetaResource = key;
lastAcquiredResource = o;
return((T)o.Object);
}
