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Only create the dicts and hashset when a lock is requested

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This commit is contained in:
Mole
2021-03-17 13:09:45 +01:00
parent 54a4a76efb
commit 9bd1b06eaf
2 changed files with 81 additions and 26 deletions
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33
src/Umbraco.Core/Scoping/Scope.cs
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@@ -37,13 +37,13 @@ namespace Umbraco.Core.Scoping
private IEventDispatcher _eventDispatcher;
private object _dictionaryLocker;
private readonly HashSet<int> _readLocks;
private readonly HashSet<int> _writeLocks;
private HashSet<int> _readLocks;
private HashSet<int> _writeLocks;
// ReadLocks and WriteLocks if we're the outer most scope it's those owned by the entire chain
// If we're a child scope it's those that we have requested.
internal readonly Dictionary<Guid, Dictionary<int, int>> ReadLocks;
internal readonly Dictionary<Guid, Dictionary<int, int>> WriteLocks;
internal Dictionary<Guid, Dictionary<int, int>> ReadLocks { get; private set; }
internal Dictionary<Guid, Dictionary<int, int>> WriteLocks { get; private set; }
// initializes a new scope
private Scope(ScopeProvider scopeProvider,
@@ -70,10 +70,6 @@ namespace Umbraco.Core.Scoping
Detachable = detachable;
_dictionaryLocker = new object();
WriteLocks = new Dictionary<Guid, Dictionary<int, int>>();
ReadLocks = new Dictionary<Guid, Dictionary<int, int>>();
_writeLocks = new HashSet<int>();
_readLocks = new HashSet<int>();
#if DEBUG_SCOPES
_scopeProvider.RegisterScope(this);
@@ -374,7 +370,7 @@ namespace Umbraco.Core.Scoping
{
// We're the parent scope, make sure that locks of all scopes has been cleared
// Since we're only reading we don't have to be in a lock
if (ReadLocks.Any() || WriteLocks.Any())
if (ReadLocks is not null && ReadLocks.Any() || WriteLocks is not null && WriteLocks.Any())
{
throw new InvalidOperationException($"All scopes has not been disposed from parent scope: {InstanceId}");
}
@@ -529,6 +525,9 @@ namespace Umbraco.Core.Scoping
private void IncrementWriteLock(int lockId, Guid instanceId)
{
// Since we've already checked that we're the parent in the WriteLockInner method, we don't need to check again.
// If it's the very first time a lock has been requested the WriteLocks dict hasn't been instantiated yet.
WriteLocks ??= new Dictionary<Guid, Dictionary<int, int>>();
// Try and get the dict associated with the scope id.
var locksDictFound = WriteLocks.TryGetValue(instanceId, out var locksDict);
if (locksDictFound)
@@ -555,6 +554,9 @@ namespace Umbraco.Core.Scoping
private void IncrementReadLock(int lockId, Guid instanceId)
{
// Since we've already checked that we're the parent in the WriteLockInner method, we don't need to check again.
// If it's the very first time a lock has been requested the ReadLocks dict hasn't been instantiated yet.
ReadLocks ??= new Dictionary<Guid, Dictionary<int, int>>();
var locksDictFound = ReadLocks.TryGetValue(instanceId, out var locksDict);
if (locksDictFound)
{
@@ -581,6 +583,12 @@ namespace Umbraco.Core.Scoping
}
else
{
if (ReadLocks is null)
{
// If ReadLocks is null, no locks has been requested and we don't have to do anything.
return;
}
lock (_dictionaryLocker)
{
// Remove the scope from the dictionary because it's getting disposed.
@@ -604,6 +612,11 @@ namespace Umbraco.Core.Scoping
}
else
{
if (WriteLocks is null)
{
return;
}
lock (_dictionaryLocker)
{
// Remove the scope from the dictionary because it's getting disposed.
@@ -656,6 +669,7 @@ namespace Umbraco.Core.Scoping
lock (_dictionaryLocker)
{
_readLocks ??= new HashSet<int>();
// If we are the parent, then handle the lock request.
foreach (var lockId in lockIds)
{
@@ -712,6 +726,7 @@ namespace Umbraco.Core.Scoping
lock (_dictionaryLocker)
{
_writeLocks ??= new HashSet<int>();
foreach (var lockId in lockIds)
{
// Only acquire lock if we haven't yet (WriteLocks not containing the key)