Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / DataOracleClient / System / Data / OracleClient / OciEnlistContext.cs / 1 / OciEnlistContext.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Data.OracleClient { using System; using System.Data.Common; using System.Diagnostics; using System.Runtime.CompilerServices; using System.Runtime.InteropServices; using System.Threading; using SysTx = System.Transactions; using System.Runtime.ConstrainedExecution; sealed internal class OciEnlistContext : SafeHandle { private OciServiceContextHandle _serviceContextHandle; internal OciEnlistContext(byte[] userName, byte[] password, byte[] serverName, OciServiceContextHandle serviceContextHandle, OciErrorHandle errorHandle) : base(IntPtr.Zero, true) { RuntimeHelpers.PrepareConstrainedRegions(); try {} finally { _serviceContextHandle = serviceContextHandle; int rc = 0; try { rc = TracedNativeMethods.OraMTSEnlCtxGet(userName, password, serverName, _serviceContextHandle, errorHandle, out base.handle); } catch (DllNotFoundException e) { throw ADP.DistribTxRequiresOracleServicesForMTS(e); } if (0 != rc) { OracleException.Check(errorHandle, rc); } // Make sure the transaction context is disposed before the service // context is. serviceContextHandle.AddRef(); } } public override bool IsInvalid { get { return (IntPtr.Zero == base.handle); } } internal void Join(OracleInternalConnection internalConnection, SysTx.Transaction indigoTransaction) { SysTx.IDtcTransaction oleTxTransaction = ADP.GetOletxTransaction(indigoTransaction); int rc = TracedNativeMethods.OraMTSJoinTxn(this, oleTxTransaction); if (0 != rc) { OracleException.Check(rc, internalConnection); } } override protected bool ReleaseHandle() { // NOTE: The SafeHandle class guarantees this will be called exactly once. IntPtr ptr = base.handle; base.handle = IntPtr.Zero; if (IntPtr.Zero != ptr) { TracedNativeMethods.OraMTSEnlCtxRel(ptr); } // OK, now we can release the service context. if (null != _serviceContextHandle) { _serviceContextHandle.Release(); _serviceContextHandle = null; } return true; } internal static void SafeDispose(ref OciEnlistContext ociEnlistContext) { // Safely disposes of the handle (even if it is already null) and // then nulls it out. if (null != ociEnlistContext) { ociEnlistContext.Dispose(); } ociEnlistContext = null; } //--------------------------------------------------------------------- static internal IntPtr HandleValueToTrace (OciEnlistContext handle) { return handle.DangerousGetHandle(); // for tracing purposes, it's safe to just print this -- no handle recycling issues. } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Data.OracleClient { using System; using System.Data.Common; using System.Diagnostics; using System.Runtime.CompilerServices; using System.Runtime.InteropServices; using System.Threading; using SysTx = System.Transactions; using System.Runtime.ConstrainedExecution; sealed internal class OciEnlistContext : SafeHandle { private OciServiceContextHandle _serviceContextHandle; internal OciEnlistContext(byte[] userName, byte[] password, byte[] serverName, OciServiceContextHandle serviceContextHandle, OciErrorHandle errorHandle) : base(IntPtr.Zero, true) { RuntimeHelpers.PrepareConstrainedRegions(); try {} finally { _serviceContextHandle = serviceContextHandle; int rc = 0; try { rc = TracedNativeMethods.OraMTSEnlCtxGet(userName, password, serverName, _serviceContextHandle, errorHandle, out base.handle); } catch (DllNotFoundException e) { throw ADP.DistribTxRequiresOracleServicesForMTS(e); } if (0 != rc) { OracleException.Check(errorHandle, rc); } // Make sure the transaction context is disposed before the service // context is. serviceContextHandle.AddRef(); } } public override bool IsInvalid { get { return (IntPtr.Zero == base.handle); } } internal void Join(OracleInternalConnection internalConnection, SysTx.Transaction indigoTransaction) { SysTx.IDtcTransaction oleTxTransaction = ADP.GetOletxTransaction(indigoTransaction); int rc = TracedNativeMethods.OraMTSJoinTxn(this, oleTxTransaction); if (0 != rc) { OracleException.Check(rc, internalConnection); } } override protected bool ReleaseHandle() { // NOTE: The SafeHandle class guarantees this will be called exactly once. IntPtr ptr = base.handle; base.handle = IntPtr.Zero; if (IntPtr.Zero != ptr) { TracedNativeMethods.OraMTSEnlCtxRel(ptr); } // OK, now we can release the service context. if (null != _serviceContextHandle) { _serviceContextHandle.Release(); _serviceContextHandle = null; } return true; } internal static void SafeDispose(ref OciEnlistContext ociEnlistContext) { // Safely disposes of the handle (even if it is already null) and // then nulls it out. if (null != ociEnlistContext) { ociEnlistContext.Dispose(); } ociEnlistContext = null; } //--------------------------------------------------------------------- static internal IntPtr HandleValueToTrace (OciEnlistContext handle) { return handle.DangerousGetHandle(); // for tracing purposes, it's safe to just print this -- no handle recycling issues. } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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