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Overview
| Comment: | Add the SQLiteConnectionLock base class and use it from the classes that need to hold onto a native database connection handle. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | sessions |
| Files: | files | file ages | folders |
| SHA1: |
91d210a6caf1c5139eb1770779eef2a6 |
| User & Date: | mistachkin 2017-10-06 21:44:00 |
Context
|
2017-10-06
| ||
| 23:07 | Add GetObject method to the SQLiteValue class for use in testing and debugging. check-in: 756bbf5fcb user: mistachkin tags: sessions | |
| 21:44 | Add the SQLiteConnectionLock base class and use it from the classes that need to hold onto a native database connection handle. check-in: 91d210a6ca user: mistachkin tags: sessions | |
| 20:56 | Make GetNativeHandle private. check-in: 4e6e08e9c5 user: mistachkin tags: sessions | |
Changes
Changes to System.Data.SQLite/SQLiteConnection.cs.
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if (sqlite3 == null)
throw new InvalidOperationException("Connection has no wrapper");
SQLiteConnectionHandle handle = sqlite3._sql;
if (handle == null)
throw new InvalidOperationException("Connection has an invalid handle.");
return handle;
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
|
> > > > > > > > |
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if (sqlite3 == null)
throw new InvalidOperationException("Connection has no wrapper");
SQLiteConnectionHandle handle = sqlite3._sql;
if (handle == null)
throw new InvalidOperationException("Connection has an invalid handle.");
IntPtr handlePtr = handle;
if (handlePtr == IntPtr.Zero)
{
throw new InvalidOperationException(
"Connection has an invalid handle pointer.");
}
return handle;
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
|
Changes to System.Data.SQLite/SQLiteModule.cs.
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/// <returns>
/// The native NUL-terminated UTF-8 string pointer or
/// <see cref="IntPtr.Zero" /> upon failure.
/// </returns>
public static IntPtr Utf8IntPtrFromString(
string value
)
{
if (value == null)
return IntPtr.Zero;
IntPtr result = IntPtr.Zero;
byte[] bytes = GetUtf8BytesFromString(value);
if (bytes == null)
return IntPtr.Zero;
int length = bytes.Length;
result = SQLiteMemory.Allocate(length + 1);
if (result == IntPtr.Zero)
return IntPtr.Zero;
Marshal.Copy(bytes, 0, result, length);
|
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/// <returns>
/// The native NUL-terminated UTF-8 string pointer or
/// <see cref="IntPtr.Zero" /> upon failure.
/// </returns>
public static IntPtr Utf8IntPtrFromString(
string value
)
{
int length = 0;
return Utf8IntPtrFromString(value, ref length);
}
///////////////////////////////////////////////////////////////////////
/// <summary>
/// Converts the specified managed string into a native NUL-terminated
/// UTF-8 string pointer using memory obtained from the SQLite core
/// library.
/// </summary>
/// <param name="value">
/// The managed string to convert.
/// </param>
/// <param name="length">
/// The length of the native string, in bytes.
/// </param>
/// <returns>
/// The native NUL-terminated UTF-8 string pointer or
/// <see cref="IntPtr.Zero" /> upon failure.
/// </returns>
public static IntPtr Utf8IntPtrFromString(
string value,
ref int length
)
{
if (value == null)
return IntPtr.Zero;
IntPtr result = IntPtr.Zero;
byte[] bytes = GetUtf8BytesFromString(value);
if (bytes == null)
return IntPtr.Zero;
length = bytes.Length;
result = SQLiteMemory.Allocate(length + 1);
if (result == IntPtr.Zero)
return IntPtr.Zero;
Marshal.Copy(bytes, 0, result, length);
|
Changes to System.Data.SQLite/SQLiteSession.cs.
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* Written by Joe Mistachkin (joe@mistachkin.com)
*
* Released to the public domain, use at your own risk!
********************************************************/
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Globalization;
using System.Runtime.InteropServices;
namespace System.Data.SQLite
{
#region Session Extension Enumerations
................................................................................
void LoadDifferencesFromTable(
string fromDatabaseName,
string tableName
);
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteChangeSetIterator Class
internal abstract class SQLiteChangeSetIterator : IDisposable
{
#region Private Data
................................................................................
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteSession Class
internal sealed class SQLiteSession : ISQLiteSession
{
#region Private Data
private SQLiteConnectionHandle handle;
private SQLiteConnectionFlags flags;
private string databaseName;
///////////////////////////////////////////////////////////////////////
................................................................................
#region Public Constructors
public SQLiteSession(
SQLiteConnectionHandle handle,
SQLiteConnectionFlags flags,
string databaseName
)
{
this.handle = handle;
this.flags = flags;
this.databaseName = databaseName;
Initialize();
}
................................................................................
}
}
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IDisposable Members
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IDisposable "Pattern" Members
private bool disposed;
private void CheckDisposed() /* throw */
{
#if THROW_ON_DISPOSED
if (disposed)
throw new ObjectDisposedException(typeof(SQLiteSession).Name);
#endif
}
///////////////////////////////////////////////////////////////////////
private /* protected virtual */ void Dispose(bool disposing)
{
try
{
if (!disposed)
{
//if (disposing)
//{
................................................................................
//////////////////////////////////////
if (session != IntPtr.Zero)
{
UnsafeNativeMethods.sqlite3session_delete(session);
session = IntPtr.Zero;
}
}
}
finally
{
//
// NOTE: Everything should be fully disposed at this point.
//
disposed = true;
}
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Destructor
~SQLiteSession()
{
Dispose(false);
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteMemoryChangeSet Class
internal sealed class SQLiteMemoryChangeSet :
ISQLiteChangeSet, IEnumerable<ISQLiteChangeSetMetadataItem>
{
#region Private Data
private byte[] rawData;
private SQLiteConnectionHandle handle;
private SQLiteConnectionFlags flags;
#endregion
................................................................................
#region Private Constructors
internal SQLiteMemoryChangeSet(
byte[] rawData,
SQLiteConnectionHandle handle,
SQLiteConnectionFlags flags
)
{
this.rawData = rawData;
this.handle= handle;
this.flags = flags;
}
#endregion
................................................................................
{
return GetEnumerator();
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IDisposable Members
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IDisposable "Pattern" Members
private bool disposed;
private void CheckDisposed() /* throw */
{
#if THROW_ON_DISPOSED
if (disposed)
{
................................................................................
typeof(SQLiteMemoryChangeSet).Name);
}
#endif
}
///////////////////////////////////////////////////////////////////////
private /* protected virtual */ void Dispose(bool disposing)
{
try
{
if (!disposed)
{
if (disposing)
{
................................................................................
if (rawData != null)
rawData = null;
}
//////////////////////////////////////
// release unmanaged resources here...
//////////////////////////////////////
}
}
finally
{
//
// NOTE: Everything should be fully disposed at this point.
//
disposed = true;
}
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Destructor
~SQLiteMemoryChangeSet()
{
Dispose(false);
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteStreamChangeSet Class
internal sealed class SQLiteStreamChangeSet :
ISQLiteChangeSet, IEnumerable<ISQLiteChangeSetMetadataItem>
{
#region Private Data
private Stream inputStream;
private Stream outputStream;
private SQLiteConnectionHandle handle;
private SQLiteConnectionFlags flags;
#endregion
................................................................................
#region Private Constructors
internal SQLiteStreamChangeSet(
Stream inputStream,
Stream outputStream,
SQLiteConnectionHandle handle,
SQLiteConnectionFlags flags
)
{
this.inputStream = inputStream;
this.outputStream = outputStream;
this.handle = handle;
this.flags = flags;
}
#endregion
................................................................................
{
return GetEnumerator();
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IDisposable Members
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IDisposable "Pattern" Members
private bool disposed;
private void CheckDisposed() /* throw */
{
#if THROW_ON_DISPOSED
if (disposed)
{
................................................................................
typeof(SQLiteStreamChangeSet).Name);
}
#endif
}
///////////////////////////////////////////////////////////////////////
private /* protected virtual */ void Dispose(bool disposing)
{
try
{
if (!disposed)
{
if (disposing)
{
................................................................................
if (inputStream != null)
inputStream = null; /* NOT OWNED */
}
//////////////////////////////////////
// release unmanaged resources here...
//////////////////////////////////////
}
}
finally
{
//
// NOTE: Everything should be fully disposed at this point.
//
disposed = true;
}
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Destructor
~SQLiteStreamChangeSet()
{
Dispose(false);
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteChangeSetEnumerator Class
|
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* Written by Joe Mistachkin (joe@mistachkin.com) * * Released to the public domain, use at your own risk! ********************************************************/ using System.Collections; using System.Collections.Generic; #if DEBUG using System.Diagnostics; #endif using System.IO; using System.Globalization; using System.Runtime.InteropServices; namespace System.Data.SQLite { #region Session Extension Enumerations ................................................................................ void LoadDifferencesFromTable( string fromDatabaseName, string tableName ); } #endregion /////////////////////////////////////////////////////////////////////////// #region SQLiteConnectionLock Class internal abstract class SQLiteConnectionLock : IDisposable { #region Private Constants private const string LockNopSql = "SELECT 1;"; #endregion /////////////////////////////////////////////////////////////////////// #region Private Data private SQLiteConnectionHandle handle; private SQLiteConnectionFlags flags; /////////////////////////////////////////////////////////////////////// private IntPtr statement; #endregion /////////////////////////////////////////////////////////////////////// #region Public Constructors public SQLiteConnectionLock( SQLiteConnectionHandle handle, SQLiteConnectionFlags flags ) { this.handle = handle; this.flags = flags; Lock(); } #endregion /////////////////////////////////////////////////////////////////////// #region Private Methods private IntPtr GetHandle() { if (handle == null) { throw new InvalidOperationException( "Connection lock object has an invalid handle."); } IntPtr handlePtr = handle; if (handlePtr == IntPtr.Zero) { throw new InvalidOperationException( "Connection lock object has an invalid handle pointer."); } return handlePtr; } #endregion /////////////////////////////////////////////////////////////////////// #region Public Methods public void Lock() { CheckDisposed(); if (statement != IntPtr.Zero) return; IntPtr pSql = IntPtr.Zero; try { int nSql = 0; pSql = SQLiteString.Utf8IntPtrFromString(LockNopSql, ref nSql); IntPtr pRemain = IntPtr.Zero; int nRemain = 0; SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3_prepare_interop( GetHandle(), pSql, nSql, ref statement, ref pRemain, ref nRemain); if (rc != SQLiteErrorCode.Ok) throw new SQLiteException(rc, "sqlite3_prepare_interop"); } finally { if (pSql != IntPtr.Zero) { SQLiteMemory.Free(pSql); pSql = IntPtr.Zero; } } } /////////////////////////////////////////////////////////////////////// public void Unlock() { CheckDisposed(); if (statement == IntPtr.Zero) return; SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3_finalize_interop( statement); if (rc != SQLiteErrorCode.Ok) throw new SQLiteException(rc, "sqlite3_finalize_interop"); statement = IntPtr.Zero; } #endregion /////////////////////////////////////////////////////////////////////// #region IDisposable Members public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } #endregion /////////////////////////////////////////////////////////////////////// #region IDisposable "Pattern" Members private bool disposed; private void CheckDisposed() /* throw */ { #if THROW_ON_DISPOSED if (disposed) { throw new ObjectDisposedException( typeof(SQLiteConnectionLock).Name); } #endif } /////////////////////////////////////////////////////////////////////// protected virtual void Dispose(bool disposing) { try { if (!disposed) { //if (disposing) //{ // //////////////////////////////////// // // dispose managed resources here... // //////////////////////////////////// //} ////////////////////////////////////// // release unmanaged resources here... ////////////////////////////////////// if (statement != IntPtr.Zero) { // // NOTE: This should never happen. This object was // disposed (or finalized) without the Unlock // method being called first. // try { if ((flags & SQLiteConnectionFlags.LogPrepare) == SQLiteConnectionFlags.LogPrepare) { /* throw */ SQLiteLog.LogMessage(SQLiteErrorCode.Misuse, HelperMethods.StringFormat(CultureInfo.CurrentCulture, "Connection lock object was {0} with statement {1}", disposing ? "disposed" : "finalized", statement)); } } catch { // do nothing. } #if DEBUG Debugger.Break(); #endif } } } finally { // // NOTE: Everything should be fully disposed at this point. // disposed = true; } } #endregion /////////////////////////////////////////////////////////////////////// #region Destructor ~SQLiteConnectionLock() { Dispose(false); } #endregion } #endregion /////////////////////////////////////////////////////////////////////////// #region SQLiteChangeSetIterator Class internal abstract class SQLiteChangeSetIterator : IDisposable { #region Private Data ................................................................................ #endregion } #endregion /////////////////////////////////////////////////////////////////////////// #region SQLiteSession Class internal sealed class SQLiteSession : SQLiteConnectionLock, ISQLiteSession { #region Private Data private SQLiteConnectionHandle handle; private SQLiteConnectionFlags flags; private string databaseName; /////////////////////////////////////////////////////////////////////// ................................................................................ #region Public Constructors public SQLiteSession( SQLiteConnectionHandle handle, SQLiteConnectionFlags flags, string databaseName ) : base(handle, flags) { this.handle = handle; this.flags = flags; this.databaseName = databaseName; Initialize(); } ................................................................................ } } } #endregion /////////////////////////////////////////////////////////////////////// #region IDisposable "Pattern" Members private bool disposed; private void CheckDisposed() /* throw */ { #if THROW_ON_DISPOSED if (disposed) throw new ObjectDisposedException(typeof(SQLiteSession).Name); #endif } /////////////////////////////////////////////////////////////////////// protected override void Dispose(bool disposing) { try { if (!disposed) { //if (disposing) //{ ................................................................................ ////////////////////////////////////// if (session != IntPtr.Zero) { UnsafeNativeMethods.sqlite3session_delete(session); session = IntPtr.Zero; } Unlock(); } } finally { base.Dispose(disposing); // // NOTE: Everything should be fully disposed at this point. // disposed = true; } } #endregion } #endregion /////////////////////////////////////////////////////////////////////////// #region SQLiteMemoryChangeSet Class internal sealed class SQLiteMemoryChangeSet : SQLiteConnectionLock, ISQLiteChangeSet, IEnumerable<ISQLiteChangeSetMetadataItem> { #region Private Data private byte[] rawData; private SQLiteConnectionHandle handle; private SQLiteConnectionFlags flags; #endregion ................................................................................ #region Private Constructors internal SQLiteMemoryChangeSet( byte[] rawData, SQLiteConnectionHandle handle, SQLiteConnectionFlags flags ) : base(handle, flags) { this.rawData = rawData; this.handle= handle; this.flags = flags; } #endregion ................................................................................ { return GetEnumerator(); } #endregion /////////////////////////////////////////////////////////////////////// #region IDisposable "Pattern" Members private bool disposed; private void CheckDisposed() /* throw */ { #if THROW_ON_DISPOSED if (disposed) { ................................................................................ typeof(SQLiteMemoryChangeSet).Name); } #endif } /////////////////////////////////////////////////////////////////////// protected override void Dispose(bool disposing) { try { if (!disposed) { if (disposing) { ................................................................................ if (rawData != null) rawData = null; } ////////////////////////////////////// // release unmanaged resources here... ////////////////////////////////////// Unlock(); } } finally { base.Dispose(disposing); // // NOTE: Everything should be fully disposed at this point. // disposed = true; } } #endregion } #endregion /////////////////////////////////////////////////////////////////////////// #region SQLiteStreamChangeSet Class internal sealed class SQLiteStreamChangeSet : SQLiteConnectionLock, ISQLiteChangeSet, IEnumerable<ISQLiteChangeSetMetadataItem> { #region Private Data private Stream inputStream; private Stream outputStream; private SQLiteConnectionHandle handle; private SQLiteConnectionFlags flags; #endregion ................................................................................ #region Private Constructors internal SQLiteStreamChangeSet( Stream inputStream, Stream outputStream, SQLiteConnectionHandle handle, SQLiteConnectionFlags flags ) : base(handle, flags) { this.inputStream = inputStream; this.outputStream = outputStream; this.handle = handle; this.flags = flags; } #endregion ................................................................................ { return GetEnumerator(); } #endregion /////////////////////////////////////////////////////////////////////// #region IDisposable "Pattern" Members private bool disposed; private void CheckDisposed() /* throw */ { #if THROW_ON_DISPOSED if (disposed) { ................................................................................ typeof(SQLiteStreamChangeSet).Name); } #endif } /////////////////////////////////////////////////////////////////////// protected override void Dispose(bool disposing) { try { if (!disposed) { if (disposing) { ................................................................................ if (inputStream != null) inputStream = null; /* NOT OWNED */ } ////////////////////////////////////// // release unmanaged resources here... ////////////////////////////////////// Unlock(); } } finally { base.Dispose(disposing); // // NOTE: Everything should be fully disposed at this point. // disposed = true; } } #endregion } #endregion /////////////////////////////////////////////////////////////////////////// #region SQLiteChangeSetEnumerator Class |