ToxicMushroom/Penumbra
1
0
Fork 0
mirror of https://github.com/xivdev/Penumbra.git synced 2025-12-12 10:17:22 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

bugfix: fixed a race condition potentially causing last write wins

Browse source
This commit is contained in:
mayo 2025-11-01 16:45:33 -04:00
parent 723eaa0076
commit d4b6f611f8
No known key found for this signature in database
GPG key ID: 5B138E78344184A6
1 changed files with 16 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

27
Penumbra/Collections/Manager/CollectionStorage.cs
View file

@ -31,36 +31,38 @@ public class CollectionStorage : IReadOnlyList<ModCollection>, IDisposable, ISer
public ModCollection Create(string name, int index, ModCollection? duplicate)
{
var newCollection = duplicate?.Duplicate(name, CurrentCollectionId, index)
?? ModCollection.CreateEmpty(name, CurrentCollectionId, index, _modStorage.Count);
Add(newCollection);
var localId = AllocateNextId();
var newCollection = duplicate?.Duplicate(name, localId, index)
?? ModCollection.CreateEmpty(name, localId, index, _modStorage.Count);
AddAtLocalId(newCollection, localId);
return newCollection;
}
public ModCollection CreateFromData(Guid id, string name, int version, Dictionary<string, ModSettings.SavedSettings> allSettings,
IReadOnlyList<string> inheritances)
{
var localId = AllocateNextId();
var newCollection = ModCollection.CreateFromData(_saveService, _modStorage,
new ModCollectionIdentity(id, CurrentCollectionId, name, Count), version, allSettings, inheritances);
Add(newCollection);
new ModCollectionIdentity(id, localId, name, Count), version, allSettings, inheritances);
AddAtLocalId(newCollection, localId);
return newCollection;
}
public ModCollection CreateTemporary(string name, int index, int globalChangeCounter)
{
var newCollection = ModCollection.CreateTemporary(name, CurrentCollectionId, index, globalChangeCounter);
Add(newCollection);
var localId = AllocateNextId();
var newCollection = ModCollection.CreateTemporary(name, localId, index, globalChangeCounter);
AddAtLocalId(newCollection, localId);
return newCollection;
}
/// <remarks> Atomically add to _collectionLocal and increments _currentCollectionIdValue. </remarks>
private void Add(ModCollection newCollection)
/// <remarks> Atomically add to _collectionLocal at the id given. </remarks>
private void AddAtLocalId(ModCollection newCollection, LocalCollectionId id)
{
_collectionsByLocal.AddOrUpdate(CurrentCollectionId,
_collectionsByLocal.AddOrUpdate(id,
static (_, newColl) => newColl,
static (_, _, newColl) => newColl,
newCollection);
Interlocked.Increment(ref _currentCollectionIdValue);
}
public void Delete(ModCollection collection)
@ -86,6 +88,9 @@ public class CollectionStorage : IReadOnlyList<ModCollection>, IDisposable, ISer
/// <remarks> Starts at 1 because the empty collection gets Zero. </remarks>
public LocalCollectionId CurrentCollectionId => new(_currentCollectionIdValue);
private LocalCollectionId AllocateNextId ()
=> new(Interlocked.Increment(ref _currentCollectionIdValue));
/// <summary> Default enumeration skips the empty collection. </summary>
public IEnumerator<ModCollection> GetEnumerator()