merge common implementations and server implementations

Emby.Server.Implementations/IO/SharpCifs/Smb/BufferCache.cs

@@ -0,0 +1,80 @@
+// This code is derived from jcifs smb client library <jcifs at samba dot org>
+// Ported by J. Arturo <webmaster at komodosoft dot net>
+//  
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// 
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+// 
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+namespace SharpCifs.Smb
+{
+	public class BufferCache
+	{
+		private static readonly int MaxBuffers = Config.GetInt("jcifs.smb.maxBuffers", 16
+			);
+
+		internal static object[] Cache = new object[MaxBuffers];
+
+		private static int _freeBuffers;
+
+		public static byte[] GetBuffer()
+		{
+			lock (Cache)
+			{
+				byte[] buf;
+				if (_freeBuffers > 0)
+				{
+					for (int i = 0; i < MaxBuffers; i++)
+					{
+						if (Cache[i] != null)
+						{
+							buf = (byte[])Cache[i];
+							Cache[i] = null;
+							_freeBuffers--;
+							return buf;
+						}
+					}
+				}
+				buf = new byte[SmbComTransaction.TransactionBufSize];
+				return buf;
+			}
+		}
+
+		internal static void GetBuffers(SmbComTransaction req, SmbComTransactionResponse 
+			rsp)
+		{
+			lock (Cache)
+			{
+				req.TxnBuf = GetBuffer();
+				rsp.TxnBuf = GetBuffer();
+			}
+		}
+
+		public static void ReleaseBuffer(byte[] buf)
+		{
+			lock (Cache)
+			{
+				if (_freeBuffers < MaxBuffers)
+				{
+					for (int i = 0; i < MaxBuffers; i++)
+					{
+						if (Cache[i] == null)
+						{
+							Cache[i] = buf;
+							_freeBuffers++;
+							return;
+						}
+					}
+				}
+			}
+		}
+	}
+}