98 lines
2.7 KiB
C#
98 lines
2.7 KiB
C#
//
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// System.LocalDataStoreSlot.cs
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//
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// Author:
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// Dick Porter (dick@ximian.com)
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//
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// (C) Ximian, Inc. http://www.ximian.com
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//
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//
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// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Reflection;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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namespace System
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{
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[ComVisible (true)]
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public sealed class LocalDataStoreSlot
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{
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internal int slot;
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internal bool thread_local; // false for context-local
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static object lock_obj = new object ();
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static bool[] slot_bitmap_thread;
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static bool[] slot_bitmap_context;
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internal LocalDataStoreSlot (bool in_thread)
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{
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thread_local = in_thread;
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lock (lock_obj) {
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int i;
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bool[] slot_bitmap;
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if (in_thread)
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slot_bitmap = slot_bitmap_thread;
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else
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slot_bitmap = slot_bitmap_context;
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if (slot_bitmap != null) {
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for (i = 0; i < slot_bitmap.Length; ++i) {
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if (!slot_bitmap [i]) {
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slot = i;
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slot_bitmap [i] = true;
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return;
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}
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}
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bool[] new_bitmap = new bool [i + 2];
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slot_bitmap.CopyTo (new_bitmap, 0);
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slot_bitmap = new_bitmap;
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} else {
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slot_bitmap = new bool [2];
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i = 0;
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}
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slot_bitmap [i] = true;
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slot = i;
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if (in_thread)
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slot_bitmap_thread = slot_bitmap;
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else
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slot_bitmap_context = slot_bitmap;
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}
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}
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~LocalDataStoreSlot ()
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{
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/* first remove all the values from the slots and
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* then free the slot itself for reuse.
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*/
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System.Threading.Thread.FreeLocalSlotValues (slot, thread_local);
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lock (lock_obj) {
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if (thread_local)
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slot_bitmap_thread [slot] = false;
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else
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slot_bitmap_context [slot] = false;
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}
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}
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}
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}
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