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Overview
| Comment: | Make the SAVEPOINT names used for nested transactions much less predictable. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | tkt-1f7bfff467 |
| Files: | files | file ages | folders |
| SHA1: |
09db2a0a1b37532d62bca59cba34e4ba |
| User & Date: | mistachkin 2016-10-29 22:19:51 |
Context
|
2016-10-30
| ||
| 03:27 | Do not try to rollback a nested transaction after it has been committed. check-in: 2bed8a7ba9 user: mistachkin tags: tkt-1f7bfff467 | |
|
2016-10-29
| ||
| 22:19 | Make the SAVEPOINT names used for nested transactions much less predictable. check-in: 09db2a0a1b user: mistachkin tags: tkt-1f7bfff467 | |
|
2016-10-28
| ||
| 21:30 | Improve the new test. check-in: 588b7768a0 user: mistachkin tags: tkt-1f7bfff467 | |
Changes
Changes to System.Data.SQLite/SQLiteTransaction.cs.
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*
* Released to the public domain, use at your own risk!
********************************************************/
namespace System.Data.SQLite
{
using System;
using System.Data;
using System.Data.Common;
using System.Threading;
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
................................................................................
private int _version;
/// <summary>
/// The isolation level for this transaction.
/// </summary>
private IsolationLevel _level;
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Constructs the transaction object, binding it to the supplied connection
/// </summary>
/// <param name="connection">The connection to open a transaction on</param>
/// <param name="deferredLock">TRUE to defer the writelock, or FALSE to lock immediately</param>
................................................................................
/// </summary>
/// <param name="level">
/// The transaction level associated with the connection.
/// </param>
/// <returns>
/// The name of the savepoint -OR- null if it cannot be constructed.
/// </returns>
private static string GetSavePointName(
int level
)
{
return String.Format("sqlite_dotnet_savepoint_{0}", level);
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Checks the state of this transaction, optionally throwing an exception if a state inconsistency is found.
/// </summary>
|
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*
* Released to the public domain, use at your own risk!
********************************************************/
namespace System.Data.SQLite
{
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Threading;
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
................................................................................
private int _version;
/// <summary>
/// The isolation level for this transaction.
/// </summary>
private IsolationLevel _level;
/// <summary>
/// The SAVEPOINT names for each transaction level.
/// </summary>
private Dictionary<int, string> _savePointNames;
/// <summary>
/// Random number generator used when creating new SAVEPOINT names.
/// </summary>
private Random _random;
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Constructs the transaction object, binding it to the supplied connection
/// </summary>
/// <param name="connection">The connection to open a transaction on</param>
/// <param name="deferredLock">TRUE to defer the writelock, or FALSE to lock immediately</param>
................................................................................
/// </summary>
/// <param name="level">
/// The transaction level associated with the connection.
/// </param>
/// <returns>
/// The name of the savepoint -OR- null if it cannot be constructed.
/// </returns>
private string GetSavePointName(
int level
)
{
if (_savePointNames == null)
_savePointNames = new Dictionary<int, string>();
string name;
if (!_savePointNames.TryGetValue(level, out name))
{
if (_random == null)
_random = new Random();
name = String.Format(
"sqlite_dotnet_savepoint_{0}_{1}", level, _random.Next());
_savePointNames[level] = name;
}
return name;
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Checks the state of this transaction, optionally throwing an exception if a state inconsistency is found.
/// </summary>
|