524 lines
18 KiB
Plaintext
524 lines
18 KiB
Plaintext
//-----------------------------------------------------------------------
|
|
// -----------------------------------------------------------------------
|
|
// file="HLSFAllocator.BucketNode.cs"
|
|
// Project: StgSharp
|
|
// AuthorGroup: Nitload Space
|
|
// Copyright (c) Nitload Space. All rights reserved.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person
|
|
// obtaining a copy of this software and associated documentation
|
|
// files (the “Software”), to deal in the Software without restriction,
|
|
// including without limitation the rights to use, copy, modify, merge,
|
|
// publish, distribute, sublicense, and/or sell copies of the Software,
|
|
// and to permit persons to whom the Software is furnished to do so,
|
|
// subject to the following conditions:
|
|
//
|
|
// The above copyright notice and
|
|
// this permission notice shall be included in all copies
|
|
// or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED “AS IS”,
|
|
// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
|
|
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
|
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
// ARISING FROM, OUT OF OR IN CONNECTION WITH
|
|
// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
//
|
|
// -----------------------------------------------------------------------
|
|
// -----------------------------------------------------------------------
|
|
using System;
|
|
using System.Runtime.CompilerServices;
|
|
using System.Runtime.InteropServices;
|
|
using System.Threading;
|
|
|
|
namespace StgSharp.HighPerformance.Memory
|
|
{
|
|
public unsafe partial class HybridLayerSegregatedFitAllocator
|
|
{
|
|
|
|
private static void AcquireBucketNodeSpinLock(BucketNode* node)
|
|
{
|
|
// 使用HLSFAllocator的private static方法
|
|
AcquireBucketNodeBothLocks(node);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initialize bucket system (called in constructor)
|
|
/// </summary>
|
|
private void InitializeBucketSystem()
|
|
{
|
|
_bucketHeads = new ulong[levelSize.Length * 3];
|
|
}
|
|
|
|
private void PushLevel(int levelIndex, int sizeIndex, BucketNode* node)
|
|
{
|
|
if (node == null || node->EntryRef == null) {
|
|
return;
|
|
}
|
|
|
|
int index = (3 * levelIndex) + sizeIndex;
|
|
if (Interlocked.CompareExchange(ref _bucketHeads[index], (nuint)node, EmptyHandle) == EmptyHandle)
|
|
{
|
|
node->IsInBucket = true;
|
|
node->Magic = BucketNode.MAGIC_NUMBER;
|
|
return;
|
|
} else
|
|
{
|
|
while (true)
|
|
{
|
|
// 对新节点只需要获取NextLock，因为我们要设置它的NextLevel
|
|
AcquireBucketNodeNextLock(node);
|
|
ulong head = Volatile.Read(ref _bucketHeads[index]);
|
|
node->NextLevel = head;
|
|
BucketNode* headNode = (BucketNode*)head;
|
|
|
|
try
|
|
{
|
|
if (Interlocked.CompareExchange(ref _bucketHeads[index], (nuint)node, head) == head)
|
|
{
|
|
// 对头节点只需要获取PrevLock，因为我们要设置它的PreviousLevel
|
|
if (headNode != null && !TryAcquireBucketNodePrevLock(headNode))
|
|
{
|
|
// reset state and retry
|
|
_ = Interlocked.CompareExchange(ref _bucketHeads[index], head, (nuint)node);
|
|
Thread.Sleep(0);
|
|
continue;
|
|
}
|
|
try
|
|
{
|
|
node->IsInBucket = true;
|
|
node->Magic = BucketNode.MAGIC_NUMBER;
|
|
if (headNode != null) {
|
|
headNode->PreviousLevel = (ulong)node;
|
|
}
|
|
return;
|
|
}
|
|
finally
|
|
{
|
|
if (headNode != null) {
|
|
ReleaseBucketNodePrevLock(headNode);
|
|
}
|
|
}
|
|
} else
|
|
{
|
|
Thread.Sleep(0);
|
|
continue;
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
ReleaseBucketNodeNextLock(node);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// 根据锁类型释放BucketNode锁
|
|
/// </summary>
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static void ReleaseBucketNodeLockByType(BucketNode* node, byte lockType)
|
|
{
|
|
switch (lockType)
|
|
{
|
|
case 0:
|
|
ReleaseBucketNodePrevLock(node);
|
|
break; // PrevLock
|
|
case 1:
|
|
ReleaseBucketNodeBothLocks(node);
|
|
break; // BothLocks
|
|
case 2:
|
|
ReleaseBucketNodeNextLock(node);
|
|
break; // NextLock
|
|
}
|
|
}
|
|
|
|
private static void ReleaseBucketNodeSpinLock(BucketNode* node)
|
|
{
|
|
// 使用HLSFAllocator的private static方法
|
|
ReleaseBucketNodeBothLocks(node);
|
|
}
|
|
|
|
/// <summary>
|
|
/// 按地址顺序释放BucketNode锁
|
|
/// </summary>
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static void ReleaseOrderedBucketLocks(BucketNode* previous, BucketNode* node, BucketNode* next)
|
|
{
|
|
// 直接释放，顺序不重要
|
|
if (previous != null)
|
|
{
|
|
ReleaseBucketNodeNextLock(previous);
|
|
}
|
|
if (node != null) {
|
|
ReleaseBucketNodeBothLocks(node);
|
|
}
|
|
if (next != null) {
|
|
ReleaseBucketNodePrevLock(next);
|
|
}
|
|
}
|
|
|
|
private void RemoveFromBucket(int levelIndex, int sizeIndex, BucketNode* node)
|
|
{
|
|
int index = (3 * levelIndex) + sizeIndex;
|
|
while (true)
|
|
{
|
|
// 检查是否是栈顶节点
|
|
if ((BucketNode*)Volatile.Read(ref _bucketHeads[index]) == node)
|
|
{
|
|
// 栈顶节点直接使用TryPopLevel
|
|
if (TryPopLevel(levelIndex, sizeIndex, out _))
|
|
{
|
|
return;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
// 中间或底部节点的删除操作
|
|
// 获取当前节点的前后指针（无锁读取）
|
|
ulong p = Volatile.Read(ref node->PreviousLevel);
|
|
ulong n = Volatile.Read(ref node->NextLevel);
|
|
BucketNode* previous = (BucketNode*)p;
|
|
BucketNode* next = (BucketNode*)n;
|
|
|
|
// 直接抢锁策略：按地址顺序获取锁，避免死锁
|
|
if (!TryAcquireOrderedBucketLocks(previous, node, next))
|
|
{
|
|
Thread.Sleep(0);
|
|
continue;
|
|
}
|
|
|
|
try
|
|
{
|
|
// 验证链表结构仍然有效（防止ABA问题）
|
|
if (Volatile.Read(ref node->PreviousLevel) != p || Volatile.Read(ref node->NextLevel) != n)
|
|
{
|
|
Thread.Sleep(0);
|
|
continue;
|
|
}
|
|
|
|
// 执行链表操作
|
|
if (previous != null)
|
|
{
|
|
previous->NextLevel = n;
|
|
}
|
|
if (next != null) {
|
|
next->PreviousLevel = p;
|
|
}
|
|
|
|
node->NextLevel = EmptyHandle;
|
|
node->PreviousLevel = EmptyHandle;
|
|
node->IsInBucket = false;
|
|
return;
|
|
}
|
|
finally
|
|
{
|
|
ReleaseOrderedBucketLocks(previous, node, next);
|
|
}
|
|
}
|
|
}
|
|
|
|
private static bool TryAcquireBucketNodeSpinLock(BucketNode* node)
|
|
{
|
|
// 使用HLSFAllocator的private static方法
|
|
return TryAcquireBucketNodeBothLocks(node);
|
|
}
|
|
|
|
/// <summary>
|
|
/// 按地址顺序获取BucketNode锁，避免死锁
|
|
/// </summary>
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static bool TryAcquireOrderedBucketLocks(BucketNode* previous, BucketNode* node, BucketNode* next)
|
|
{
|
|
// 创建排序数组（最多3个非null节点）
|
|
Span<BucketNode*> nodes = stackalloc BucketNode*[3];
|
|
Span<byte> lockTypes = stackalloc byte[3]; // 0=prev, 1=both, 2=next
|
|
int count = 0;
|
|
|
|
if (previous != null)
|
|
{
|
|
nodes[count] = previous;
|
|
lockTypes[count] = 2; // previous需要NextLock
|
|
count++;
|
|
}
|
|
if (node != null)
|
|
{
|
|
nodes[count] = node;
|
|
lockTypes[count] = 1; // node需要BothLocks
|
|
count++;
|
|
}
|
|
if (next != null)
|
|
{
|
|
nodes[count] = next;
|
|
lockTypes[count] = 0; // next需要PrevLock
|
|
count++;
|
|
}
|
|
|
|
|
|
// 按地址排序（简单冒泡排序，最多3个元素）
|
|
for (int i = 0; i < count - 1; i++)
|
|
{
|
|
for (int j = 0; j < count - i - 1; j++)
|
|
{
|
|
if ((ulong)nodes[j] > (ulong)nodes[j + 1])
|
|
{
|
|
(nodes[j], nodes[j + 1]) = (nodes[j + 1], nodes[j]);
|
|
(lockTypes[j], lockTypes[j + 1]) = (lockTypes[j + 1], lockTypes[j]);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// 按顺序尝试获取锁
|
|
int acquired = 0;
|
|
for (int i = 0; i < count; i++)
|
|
{
|
|
bool success = lockTypes[i] switch
|
|
{
|
|
0 => TryAcquireBucketNodePrevLock(nodes[i]), // PrevLock
|
|
1 => TryAcquireBucketNodeBothLocks(nodes[i]), // BothLocks
|
|
2 => TryAcquireBucketNodeNextLock(nodes[i]), // NextLock
|
|
_ => false
|
|
};
|
|
|
|
if (!success)
|
|
{
|
|
// 回滚已获取的锁
|
|
for (int j = acquired - 1; j >= 0; j--)
|
|
{
|
|
ReleaseBucketNodeLockByType(nodes[j], lockTypes[j]);
|
|
}
|
|
return false;
|
|
}
|
|
acquired++;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
private bool TryPopLevel(int levelIndex, int sizeIndex, out BucketNode* node)
|
|
{
|
|
int index = (3 * levelIndex) + sizeIndex;
|
|
while (true)
|
|
{
|
|
ulong h = Volatile.Read(ref _bucketHeads[index]);
|
|
BucketNode* head = (BucketNode*)h;
|
|
|
|
if (head == null)
|
|
{
|
|
node = null;
|
|
return false;
|
|
}
|
|
|
|
// 对头节点获取NextLock，因为我们要读取它的NextLevel
|
|
if (!TryAcquireBucketNodeNextLock(head))
|
|
{
|
|
Thread.Sleep(0);
|
|
continue;
|
|
}
|
|
|
|
ulong n = Volatile.Read(ref head->NextLevel);
|
|
BucketNode* next = (BucketNode*)n;
|
|
|
|
try
|
|
{
|
|
// 对next节点获取PrevLock，因为我们要修改它的PreviousLevel
|
|
if (next != null && !TryAcquireBucketNodePrevLock(next))
|
|
{
|
|
Thread.Sleep(0);
|
|
continue;
|
|
}
|
|
|
|
try
|
|
{
|
|
if (Interlocked.CompareExchange(ref _bucketHeads[index], head->NextLevel, h) == h)
|
|
{
|
|
node = head;
|
|
node->IsInBucket = false;
|
|
node->NextLevel = EmptyHandle;
|
|
if (next != null) {
|
|
next->PreviousLevel = EmptyHandle;
|
|
}
|
|
return true;
|
|
} else
|
|
{
|
|
Thread.Sleep(0);
|
|
continue;
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
if (next != null) {
|
|
ReleaseBucketNodePrevLock(next);
|
|
}
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
ReleaseBucketNodeNextLock(head);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// BucketNode structure - specialized node for bucket linked lists Stored in main
|
|
/// allocation area (user-overwritable region)
|
|
/// </summary>
|
|
[StructLayout(LayoutKind.Explicit, Size = 40)]
|
|
internal struct BucketNode
|
|
{
|
|
|
|
public const uint MAGIC_NUMBER = 0xBEEFCAFE; // Magic number for node integrity verification
|
|
|
|
[FieldOffset(16)] internal Entry* EntryRef; // Pointer to corresponding Entry
|
|
[FieldOffset(28)] internal bool IsInBucket; // Whether in bucket
|
|
[FieldOffset(36)] internal int NextLock; // 后继指针锁（控制NextLevel指针操作）
|
|
|
|
// 双锁设计：分离前后指针操作
|
|
[FieldOffset(32)] internal int PrevLock; // 前驱指针锁（控制PreviousLevel指针操作）
|
|
[FieldOffset(24)] internal uint Magic; // Magic number verification
|
|
|
|
[FieldOffset(0)] internal ulong NextLevel; // Bucket stack linked list: next pointer
|
|
[FieldOffset(8)] internal ulong PreviousLevel; // Bucket stack linked list: previous pointer
|
|
|
|
}
|
|
|
|
#region BucketNode Operations
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static bool IsNullOrEmpty(BucketNode* node)
|
|
{
|
|
return node == null || node->Magic != BucketNode.MAGIC_NUMBER;
|
|
}
|
|
|
|
// BucketNode 前驱锁操作（控制PreviousLevel字段）
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static bool TryAcquireBucketNodePrevLock(BucketNode* node)
|
|
{
|
|
if (node == null) {
|
|
return true;
|
|
}
|
|
|
|
int thread = Environment.CurrentManagedThreadId;
|
|
return Interlocked.CompareExchange(ref node->PrevLock, thread, 0) == 0;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static void AcquireBucketNodePrevLock(BucketNode* node)
|
|
{
|
|
if (node == null) {
|
|
return;
|
|
}
|
|
|
|
int thread = Environment.CurrentManagedThreadId;
|
|
if (Volatile.Read(ref node->PrevLock) != thread)
|
|
{
|
|
while (Interlocked.CompareExchange(ref node->PrevLock, thread, 0) != 0) {
|
|
Thread.Sleep(0);
|
|
}
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static void ReleaseBucketNodePrevLock(BucketNode* node)
|
|
{
|
|
if (node == null) {
|
|
return;
|
|
}
|
|
|
|
int thread = Environment.CurrentManagedThreadId;
|
|
if (Volatile.Read(ref node->PrevLock) == thread) {
|
|
Volatile.Write(ref node->PrevLock, 0);
|
|
}
|
|
}
|
|
|
|
// BucketNode 后继锁操作（控制NextLevel字段）
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static bool TryAcquireBucketNodeNextLock(BucketNode* node)
|
|
{
|
|
if (node == null) {
|
|
return true;
|
|
}
|
|
|
|
int thread = Environment.CurrentManagedThreadId;
|
|
return Interlocked.CompareExchange(ref node->NextLock, thread, 0) == 0;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static void AcquireBucketNodeNextLock(BucketNode* node)
|
|
{
|
|
if (node == null) {
|
|
return;
|
|
}
|
|
|
|
int thread = Environment.CurrentManagedThreadId;
|
|
if (Volatile.Read(ref node->NextLock) != thread)
|
|
{
|
|
while (Interlocked.CompareExchange(ref node->NextLock, thread, 0) != 0) {
|
|
Thread.Sleep(0);
|
|
}
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static void ReleaseBucketNodeNextLock(BucketNode* node)
|
|
{
|
|
if (node == null) {
|
|
return;
|
|
}
|
|
|
|
int thread = Environment.CurrentManagedThreadId;
|
|
if (Volatile.Read(ref node->NextLock) == thread) {
|
|
Volatile.Write(ref node->NextLock, 0);
|
|
}
|
|
}
|
|
|
|
// BucketNode 双锁组合操作
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static bool TryAcquireBucketNodeBothLocks(BucketNode* node)
|
|
{
|
|
if (node == null) {
|
|
return true;
|
|
}
|
|
|
|
if (TryAcquireBucketNodePrevLock(node))
|
|
{
|
|
if (TryAcquireBucketNodeNextLock(node))
|
|
{
|
|
return true;
|
|
} else
|
|
{
|
|
ReleaseBucketNodePrevLock(node); // 回滚
|
|
return false;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static void ReleaseBucketNodeBothLocks(BucketNode* node)
|
|
{
|
|
if (node == null) {
|
|
return;
|
|
}
|
|
|
|
ReleaseBucketNodePrevLock(node);
|
|
ReleaseBucketNodeNextLock(node);
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static void AcquireBucketNodeBothLocks(BucketNode* node)
|
|
{
|
|
if (node == null) {
|
|
return;
|
|
}
|
|
|
|
AcquireBucketNodePrevLock(node);
|
|
AcquireBucketNodeNextLock(node);
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|