diff --git a/Misaki.HighPerformance.Jobs/JobExecutionContext.cs b/Misaki.HighPerformance.Jobs/JobExecutionContext.cs
index 1f3943b..9cbe01c 100644
--- a/Misaki.HighPerformance.Jobs/JobExecutionContext.cs
+++ b/Misaki.HighPerformance.Jobs/JobExecutionContext.cs
@@ -4,17 +4,21 @@ public readonly ref struct JobExecutionContext
 {
     public int ThreadIndex
     {
-        get;
+        get; init;
     }
 
     public IJobScheduler JobScheduler
     {
-        get;
+        get; init;
     }
 
-    public JobExecutionContext(int threadIndex, IJobScheduler jobScheduler)
+    public object? State
     {
-        ThreadIndex = threadIndex;
-        JobScheduler = jobScheduler;
+        get; init;
+    }
+
+    public JobHandle SelfHandle
+    {
+        get; init;
     }
 }
\ No newline at end of file
diff --git a/Misaki.HighPerformance.Jobs/JobInfo.cs b/Misaki.HighPerformance.Jobs/JobInfo.cs
index d236cdb..c371690 100644
--- a/Misaki.HighPerformance.Jobs/JobInfo.cs
+++ b/Misaki.HighPerformance.Jobs/JobInfo.cs
@@ -84,6 +84,9 @@ internal unsafe struct JobInfo
 
     public const int MAX_DEPENDENTS = 8;
 
+    public void* pJobData;
+    public JobExecutionFunc pExecutionFunc;
+
     // The list of jobs that are waiting for THIS job to complete.
     public fixed int dependentsID[MAX_DEPENDENTS]; // The actual list of IDs
     public fixed int dependentsGeneration[MAX_DEPENDENTS]; // The actual list of generations
@@ -93,9 +96,6 @@ internal unsafe struct JobInfo
 
     public JobRanges jobRanges;
 
-    public void* pJobData;
-    public JobExecutionFunc pExecutionFunc;
-
     public int state;
     public int remainingBatches;
 
diff --git a/Misaki.HighPerformance.Jobs/JobScheduler.cs b/Misaki.HighPerformance.Jobs/JobScheduler.cs
index fc7493c..389a382 100644
--- a/Misaki.HighPerformance.Jobs/JobScheduler.cs
+++ b/Misaki.HighPerformance.Jobs/JobScheduler.cs
@@ -5,7 +5,6 @@ using Misaki.HighPerformance.LowLevel.Utilities;
 using System.Collections.Concurrent;
 using System.Diagnostics;
 using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
 
 namespace Misaki.HighPerformance.Jobs;
 
@@ -26,9 +25,12 @@ public sealed unsafe partial class JobScheduler : IJobScheduler, IDisposable
     private readonly SemaphoreSlim _workSignal;
     private readonly CancellationTokenSource _cts;
 
+    private readonly object? _state;
+
     private bool _disposed = false;
 
     internal bool IsCancellationRequested => _cts.IsCancellationRequested;
+    internal object? State => _state;
 
     public int WorkerCount => _workerThreads.Length;
 
@@ -37,7 +39,8 @@ public sealed unsafe partial class JobScheduler : IJobScheduler, IDisposable
     /// </summary>
     /// <param name="threadCount">The number of worker threads to create. If less than 1, at least one thread will be created.</param>
     /// <param name="priority">The priority of the worker threads.</param>
-    public JobScheduler(int threadCount, ThreadPriority priority = ThreadPriority.Normal)
+    /// <param name="state">The state object for the job scheduler.</param>
+    public JobScheduler(int threadCount, ThreadPriority priority = ThreadPriority.Normal, object? state = null)
     {
         var workerCount = Math.Max(1, threadCount);
 
@@ -49,6 +52,8 @@ public sealed unsafe partial class JobScheduler : IJobScheduler, IDisposable
         _workSignal = new SemaphoreSlim(0);
         _cts = new CancellationTokenSource();
 
+        _state = state;
+
         _workerThreads = new WorkerThread[workerCount];
 
         for (var i = 0; i < workerCount; i++)
@@ -308,6 +313,8 @@ public sealed unsafe partial class JobScheduler : IJobScheduler, IDisposable
             }
         }
 
+        info.additionalDependents.Dispose();
+
         _freeList.Free(info.pJobData);
         _jobInfoPool.Remove(handle.ID, handle.Generation);
     }
@@ -320,7 +327,7 @@ public sealed unsafe partial class JobScheduler : IJobScheduler, IDisposable
         {
             return JobHandle.Invalid;
         }
-        
+
         *(T*)pJobData = job;
 
         var jobInfo = new JobInfo
@@ -573,10 +580,11 @@ public sealed unsafe partial class JobScheduler : IJobScheduler, IDisposable
         {
             if (info.pJobData != null)
             {
-                NativeMemory.Free(info.pJobData);
+                _freeList.Free(info.pJobData);
             }
         }
 
+        _freeList.Dispose();
         _workSignal.Dispose();
         _cts.Dispose();
 
diff --git a/Misaki.HighPerformance.Jobs/Misaki.HighPerformance.Jobs.csproj b/Misaki.HighPerformance.Jobs/Misaki.HighPerformance.Jobs.csproj
index c5b19bc..84987f7 100644
--- a/Misaki.HighPerformance.Jobs/Misaki.HighPerformance.Jobs.csproj
+++ b/Misaki.HighPerformance.Jobs/Misaki.HighPerformance.Jobs.csproj
@@ -6,7 +6,7 @@
     <Nullable>enable</Nullable>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
-    <AssemblyVersion>1.6.0</AssemblyVersion>
+    <AssemblyVersion>1.6.1</AssemblyVersion>
     <Version>$(AssemblyVersion)</Version>
     <Authors>Misaki</Authors>
     <PackageProjectUrl>https://git.personalnas.com/Misaki/Misaki.HighPerformance.git</PackageProjectUrl>
diff --git a/Misaki.HighPerformance.Jobs/WorkerThread.cs b/Misaki.HighPerformance.Jobs/WorkerThread.cs
index ef98ab1..4721d03 100644
--- a/Misaki.HighPerformance.Jobs/WorkerThread.cs
+++ b/Misaki.HighPerformance.Jobs/WorkerThread.cs
@@ -106,7 +106,14 @@ internal class WorkerThread : IDisposable
 
                 if (jobInfo.pExecutionFunc != null)
                 {
-                    var ctx = new JobExecutionContext(_index, _scheduler);
+                    var ctx = new JobExecutionContext
+                    {
+                        ThreadIndex = _index,
+                        JobScheduler = _scheduler,
+                        State = _scheduler.State,
+                        SelfHandle = handle,
+                    };
+
                     if (!jobInfo.pExecutionFunc(jobInfo.pJobData, ref jobInfo.jobRanges, ref jobInfo.remainingBatches, in ctx))
                     {
                         // If the job returns false, it means it we are not the last worker to process this job, so we should not mark it as complete yet.
diff --git a/Misaki.HighPerformance.Test/Benchmark/SPMDBenchmark.cs b/Misaki.HighPerformance.Test/Benchmark/SPMDBenchmark.cs
index 7e603c4..72a245a 100644
--- a/Misaki.HighPerformance.Test/Benchmark/SPMDBenchmark.cs
+++ b/Misaki.HighPerformance.Test/Benchmark/SPMDBenchmark.cs
@@ -94,7 +94,6 @@ public unsafe class SPMDBenchmark
             height = _SIZE,
         };
 
-        var ctx = new JobExecutionContext(-1, _scheduler);
-        job.Run(_SIZE * _SIZE, in ctx);
+        job.Run(_SIZE * _SIZE, default);
     }
 }
diff --git a/Misaki.HighPerformance.Test/Program.cs b/Misaki.HighPerformance.Test/Program.cs
index b276556..a6aa1b7 100644
--- a/Misaki.HighPerformance.Test/Program.cs
+++ b/Misaki.HighPerformance.Test/Program.cs
@@ -1,21 +1,136 @@
 using Misaki.HighPerformance.LowLevel.Buffer;
 using Misaki.HighPerformance.LowLevel.Collections;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 
 //BenchmarkRunner.Run<SPMDBenchmark>();
 
-//AllocationManager.Initialize(AllocationManagerInitOpts.Default);
-//var set = new UnsafeBitSet(100, AllocationHandle.Persistent, AllocationOption.Clear);
-//set.SetBit(0);
-//Console.WriteLine(set.NextSetBit(0));
+AllocationManager.Initialize(AllocationManagerInitOpts.Default);
+var set = new UnsafeBitSet(100, AllocationHandle.Persistent, AllocationOption.Clear);
+set.SetBit(0);
+Console.WriteLine(set.NextSetBit(0));
 
-//set.Dispose();
-//AllocationManager.Dispose();
+set.Dispose();
+AllocationManager.Dispose();
 
-var span = Span<int>.Empty;
-unsafe
-{
-    fixed (int* ptr = span)
-    {
-        Console.WriteLine((IntPtr)ptr);
-    }
-}
+//unsafe
+//{
+//    var testC = new TestC();
+//    testC.BindToVtables();
+//    testC.MyValue = 42;
+
+//    // 1. Casting to IB (Direct cast, offset 0)
+//    var pB = (IB.Interface*)&testC;
+//    pB->MethodA();
+//    pB->MethodB();
+
+//    // 2. Casting to IC (Pointer adjustment needed!)
+//    // We must offset the pointer by the size of one void* so it points to lpVtbl_IC
+//    var pC = (IC.Interface*)((byte*)&testC + sizeof(void*));
+//    pC->MethodC();
+//}
+
+//public interface IA
+//{
+//    [StructLayout(LayoutKind.Sequential)]
+//    unsafe struct Interface
+//    {
+//        public void** lpVtbl;
+//        public void MethodA() => ((delegate*<Interface*, void>)lpVtbl[0])((Interface*)Unsafe.AsPointer(ref this));
+//    }
+//}
+
+//public interface IB : IA
+//{
+//    [StructLayout(LayoutKind.Sequential)]
+//    new unsafe struct Interface
+//    {
+//        public void** lpVtbl;
+//        // IA Methods
+//        public void MethodA() => ((delegate*<Interface*, void>)lpVtbl[0])((Interface*)Unsafe.AsPointer(ref this));
+//        // IB Methods
+//        public void MethodB() => ((delegate*<Interface*, void>)lpVtbl[1])((Interface*)Unsafe.AsPointer(ref this));
+//    }
+//}
+
+//public interface IC
+//{
+//    [StructLayout(LayoutKind.Sequential)]
+//    unsafe struct Interface
+//    {
+//        public void** lpVtbl;
+//        public void MethodC() => ((delegate*<Interface*, void>)lpVtbl[0])((Interface*)Unsafe.AsPointer(ref this));
+//    }
+//}
+
+//[StructLayout(LayoutKind.Sequential)]
+//public unsafe partial struct TestC
+//{
+//    // Offset 0: Primary VTable (Covers IB and IA)
+//    public void** lpVtbl_IB;
+
+//    // Offset 8 (on 64-bit): Secondary VTable (Covers IC)
+//    public void** lpVtbl_IC;
+
+//    // Offset 16: Fields
+//    public int MyValue;
+//}
+
+//public unsafe partial struct TestC
+//{
+//    public struct Vtbl_IB
+//    {
+//        public delegate*<IB.Interface*, void> MethodA;
+//        public delegate*<IB.Interface*, void> MethodB;
+//    }
+
+//    public struct Vtbl_IC
+//    {
+//        public delegate*<IC.Interface*, void> MethodC;
+//    }
+
+//    [FixedAddressValueType]
+//    public static readonly Vtbl_IB Table_IB = new Vtbl_IB
+//    {
+//        MethodA = &Native_MethodA,
+//        MethodB = &Native_MethodB
+//    };
+
+//    [FixedAddressValueType]
+//    public static readonly Vtbl_IC Table_IC = new Vtbl_IC
+//    {
+//        MethodC = &Native_MethodC
+//    };
+
+//    public void BindToVtables()
+//    {
+//        fixed (Vtbl_IB* pIB = &Table_IB)
+//            lpVtbl_IB = (void**)pIB;
+//        fixed (Vtbl_IC* pIC = &Table_IC)
+//            lpVtbl_IC = (void**)pIC;
+//    }
+
+//    // --- IB & IA Implementations ---
+//    public static void Native_MethodA(IB.Interface* self)
+//    {
+//        // For IB/IA, no adjustment is needed because lpVtbl_IB is at offset 0
+//        var pThis = (TestC*)self;
+//        Console.WriteLine($"MethodA called. MyValue: {pThis->MyValue}");
+//    }
+
+//    public static void Native_MethodB(IB.Interface* self)
+//    {
+//        var pThis = (TestC*)self;
+//        Console.WriteLine($"MethodB called. MyValue: {pThis->MyValue}");
+//    }
+
+//    // --- IC Implementations ---
+//    public static void Native_MethodC(IC.Interface* self)
+//    {
+//        // WARNING: 'self' points to the lpVtbl_IC field, NOT the start of TestC!
+//        // We must shift the pointer backward by the size of lpVtbl_IB (sizeof(void*))
+//        // to reconstruct the original TestC pointer, otherwise we read garbage memory.
+//        var pThis = (TestC*)((byte*)self - sizeof(void*));
+//        Console.WriteLine($"MethodC called. MyValue: {pThis->MyValue}");
+//    }
+//}
\ No newline at end of file
diff --git a/Misaki.HighPerformance.Test/UnitTest/Jobs/TestJobSystem.cs b/Misaki.HighPerformance.Test/UnitTest/Jobs/TestJobSystem.cs
index d4a645e..4552bd9 100644
--- a/Misaki.HighPerformance.Test/UnitTest/Jobs/TestJobSystem.cs
+++ b/Misaki.HighPerformance.Test/UnitTest/Jobs/TestJobSystem.cs
@@ -275,8 +275,7 @@ public unsafe class TestJobSystem
             height = size,
         };
 
-        var ctx = new JobExecutionContext(-1, s_jobScheduler);
-        vectorJob.Run(size * size, in ctx);
+        vectorJob.Run(size * size, default);
 
         var spmdBuf = stackalloc float[size * size];
         var ss = new Span<float>(spmdBuf, size * size);