//
// System.LocalDataStoreSlot.cs
//
// Author:
// Dick Porter (dick@ximian.com)
//
// (C) Ximian, Inc. http://www.ximian.com
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// 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.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace System{
[ComVisible (true)]
public sealed class LocalDataStoreSlot
{
internal int slot;
internal bool thread_local; // false for context-local
static object lock_obj = new object ();
static bool[] slot_bitmap_thread;
static bool[] slot_bitmap_context;
internal LocalDataStoreSlot (bool in_thread)
{
thread_local = in_thread;
lock (lock_obj) {
int i;
bool[] slot_bitmap;
if (in_thread)
slot_bitmap = slot_bitmap_thread;
else
slot_bitmap = slot_bitmap_context;
if (slot_bitmap != null) {
for (i = 0; i < slot_bitmap.Length; ++i) {
if (!slot_bitmap [i]) {
slot = i;
slot_bitmap [i] = true;
return;
}
}
bool[] new_bitmap = new bool [i + 2];
slot_bitmap.CopyTo (new_bitmap, 0);
slot_bitmap = new_bitmap;
} else {
slot_bitmap = new bool [2];
i = 0;
}
slot_bitmap [i] = true;
slot = i;
if (in_thread)
slot_bitmap_thread = slot_bitmap;
else
slot_bitmap_context = slot_bitmap;
}
}
~LocalDataStoreSlot ()
{
/* first remove all the values from the slots and
* then free the slot itself for reuse.
*/
System.Threading.Thread.FreeLocalSlotValues (slot, thread_local);
lock (lock_obj) {
if (thread_local)
slot_bitmap_thread [slot] = false;
else
slot_bitmap_context [slot] = false;
}
}
}
}
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