3 // Permission is hereby granted, free of charge, to any person obtaining
4 // a copy of this software and associated documentation files (the
5 // "Software"), to deal in the Software without restriction, including
6 // without limitation the rights to use, copy, modify, merge, publish,
7 // distribute, sublicense, and/or sell copies of the Software, and to
8 // permit persons to whom the Software is furnished to do so, subject to
9 // the following conditions:
11 // The above copyright notice and this permission notice shall be
12 // included in all copies or substantial portions of the Software.
14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
15 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
17 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
18 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
19 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
20 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 using System
.Collections
;
25 namespace IBM
.Data
.DB2
28 internal sealed class DB2Environment
: IDisposable
30 private static DB2Environment environment
;
31 internal Hashtable connectionPools
;
32 internal IntPtr penvHandle
= IntPtr
.Zero
;
34 private DB2Environment()
36 connectionPools
= Hashtable
.Synchronized(new Hashtable());
38 // short sqlRet = DB2CLIWrapper.SQLAllocHandle(DB2Constants.SQL_HANDLE_ENV, IntPtr.Zero, ref penvHandle);
39 short sqlRet
= DB2CLIWrapper
.Initialize(ref penvHandle
);
40 DB2ClientUtils
.DB2CheckReturn(sqlRet
, 0, IntPtr
.Zero
, "Unable to allocate Environment handle.", null);
42 // SQLSetEnvAttr( hEnv=0:1, fAttribute=SQL_ATTR_APP_TYPE 2473, vParam=4, cbParam=0 ) // 4=ADO.NET apptype????
43 // SQLSetEnvAttr( hEnv=0:1, fAttribute=SQL_ATTR_OUTPUT_NTS 10001, vParam=0, cbParam=0 ) // strings not 0-terminated
46 public static DB2Environment Instance
50 if(environment
== null)
52 lock(typeof(DB2Environment
))
54 if(environment
== null)
56 environment
= new DB2Environment();
63 #region IDisposable Members
69 GC
.SuppressFinalize(this);
72 public void Dispose(bool disposing
)
76 DB2CLIWrapper
.SQLFreeHandle(DB2Constants
.SQL_HANDLE_ENV
, penvHandle
);