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74 lines
2.0 KiB
74 lines
2.0 KiB
5 years ago
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#if FAT
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using System;
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using System.Collections.Generic;
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using System.Threading;
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namespace LinqInternal.Threading.Needles
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{
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internal sealed class LockableSlot : IDisposable
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{
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private LockableContext _context;
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private LockSlot<Thread> _lockSlot;
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private List<NeedleLock<Thread>> _needleLocks;
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private LockableSlot _parent;
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internal LockableSlot(LockableContext context)
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{
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_context = context;
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_parent = _context.Slot;
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_context.Slot = this;
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// --
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LockSlot<Thread> lockSlot = null;
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ThreadingHelper.SpinWaitUntil(() => _context.Context.ClaimSlot(out lockSlot));
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lockSlot.Value = Thread.CurrentThread;
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_lockSlot = lockSlot;
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_needleLocks = new List<NeedleLock<Thread>>();
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}
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~LockableSlot()
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{
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Dispose();
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}
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internal LockSlot<Thread> LockSlot
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{
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get { return _lockSlot; }
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}
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public void Dispose()
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{
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var lockslot = Interlocked.Exchange(ref _lockSlot, null);
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if (ReferenceEquals(lockslot, null))
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{
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return;
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}
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var context = Interlocked.Exchange(ref _context, null);
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if (context != null)
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{
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context.Slot = _parent;
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}
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var needleLocks = Interlocked.Exchange(ref _needleLocks, null);
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if (needleLocks != null)
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{
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foreach (var needleLock in needleLocks)
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{
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needleLock.Uncapture(lockslot);
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needleLock.Release();
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}
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needleLocks.Clear();
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}
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lockslot.Close();
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ThreadingHelper.MemoryBarrier();
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_parent = null;
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GC.SuppressFinalize(this);
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}
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internal void Add(NeedleLock<Thread> pin)
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{
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_needleLocks.Add(pin);
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}
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}
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}
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#endif
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