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Overview
| Comment: | Attempt to invalidate all native delegates from a connection during its disposal. Pursuant to [0e48e80333]. Still needs tests. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | tkt-0e48e80333 |
| Files: | files | file ages | folders |
| SHA1: |
aa991525681a68d2bf2ed86014ad0ba1 |
| User & Date: | mistachkin 2017-11-09 08:04:19 |
Context
|
2017-11-09
| ||
| 08:37 | Add another error message to the UnhookNativeCallbacks method. check-in: df1cca89d1 user: mistachkin tags: tkt-0e48e80333 | |
| 08:04 | Attempt to invalidate all native delegates from a connection during its disposal. Pursuant to [0e48e80333]. Still needs tests. check-in: aa99152568 user: mistachkin tags: tkt-0e48e80333 | |
|
2017-11-07
| ||
| 03:38 | Update a doc comment. check-in: 67190e9b52 user: mistachkin tags: trunk | |
Changes
Changes to System.Data.SQLite/SQLite3.cs.
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/// <summary>
/// The opaque pointer returned to us by the sqlite provider
/// </summary>
protected internal SQLiteConnectionHandle _sql;
protected string _fileName;
protected SQLiteConnectionFlags _flags;
protected bool _usePool;
protected int _poolVersion;
private int _cancelCount;
#if (NET_35 || NET_40 || NET_45 || NET_451 || NET_452 || NET_46 || NET_461 || NET_462 || NET_47) && !PLATFORM_COMPACTFRAMEWORK
private bool _buildingSchema;
#endif
................................................................................
// release unmanaged resources here...
//////////////////////////////////////
#if INTEROP_VIRTUAL_TABLE
DisposeModules();
#endif
Close(false); /* Disposing, cannot throw. */
}
}
finally
{
base.Dispose(disposing);
//
................................................................................
///////////////////////////////////////////////////////////////////////////////////////////////
// It isn't necessary to cleanup any functions we've registered. If the connection
// goes to the pool and is resurrected later, re-registered functions will overwrite the
// previous functions. The SQLiteFunctionCookieHandle will take care of freeing unmanaged
// resources belonging to the previously-registered functions.
internal override void Close(bool canThrow)
{
if (_sql != null)
{
if (!_sql.OwnHandle)
{
_sql = null;
return;
}
bool unbindFunctions = ((_flags & SQLiteConnectionFlags.UnbindFunctionsOnClose)
== SQLiteConnectionFlags.UnbindFunctionsOnClose);
if (_usePool)
{
if (SQLiteBase.ResetConnection(_sql, _sql, canThrow))
{
if (unbindFunctions)
{
if (SQLiteFunction.UnbindAllFunctions(this, _flags, false))
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
Trace.WriteLine(HelperMethods.StringFormat(
................................................................................
#endif
SQLiteConnectionPool.Add(_fileName, _sql, _poolVersion);
SQLiteConnection.OnChanged(null, new ConnectionEventArgs(
SQLiteConnectionEventType.ClosedToPool, null, null,
null, null, _sql, _fileName, new object[] {
typeof(SQLite3), canThrow, _fileName, _poolVersion }));
#if !NET_COMPACT_20 && TRACE_CONNECTION
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Close (Pool) Success: {0}",
HandleToString()));
#endif
}
#if !NET_COMPACT_20 && TRACE_CONNECTION
else
{
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Close (Pool) Failure: {0}",
HandleToString()));
}
#endif
}
else
{
if (unbindFunctions)
{
if (SQLiteFunction.UnbindAllFunctions(this, _flags, false))
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
................................................................................
{
//
// NOTE: If the database connection is currently open, attempt to
// close it now. This must be done because the file name or
// other parameters that may impact the underlying database
// connection may have changed.
//
if (_sql != null) Close(true);
//
// NOTE: If the connection was not closed successfully, throw an
// exception now.
//
if (_sql != null)
throw new SQLiteException("connection handle is still active");
................................................................................
/// <param name="func">The callback function to invoke.</param>
/// <returns>Returns a result code</returns>
internal override SQLiteErrorCode SetLogCallback(SQLiteLogCallback func)
{
SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3_config_log(
SQLiteConfigOpsEnum.SQLITE_CONFIG_LOG, func, IntPtr.Zero);
return rc;
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Creates a new SQLite backup object based on the provided destination
/// database connection. The source database connection is the one
/// associated with this object. The source and destination database
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/// <summary>
/// The opaque pointer returned to us by the sqlite provider
/// </summary>
protected internal SQLiteConnectionHandle _sql;
protected string _fileName;
protected SQLiteConnectionFlags _flags;
private bool _setLogCallback;
protected bool _usePool;
protected int _poolVersion;
private int _cancelCount;
#if (NET_35 || NET_40 || NET_45 || NET_451 || NET_452 || NET_46 || NET_461 || NET_462 || NET_47) && !PLATFORM_COMPACTFRAMEWORK
private bool _buildingSchema;
#endif
................................................................................
// release unmanaged resources here...
//////////////////////////////////////
#if INTEROP_VIRTUAL_TABLE
DisposeModules();
#endif
Close(true); /* Disposing, cannot throw. */
}
}
finally
{
base.Dispose(disposing);
//
................................................................................
///////////////////////////////////////////////////////////////////////////////////////////////
// It isn't necessary to cleanup any functions we've registered. If the connection
// goes to the pool and is resurrected later, re-registered functions will overwrite the
// previous functions. The SQLiteFunctionCookieHandle will take care of freeing unmanaged
// resources belonging to the previously-registered functions.
internal override void Close(bool disposing)
{
if (_sql != null)
{
if (!_sql.OwnHandle)
{
_sql = null;
return;
}
bool unbindFunctions = ((_flags & SQLiteConnectionFlags.UnbindFunctionsOnClose)
== SQLiteConnectionFlags.UnbindFunctionsOnClose);
retry:
if (_usePool)
{
if (SQLiteBase.ResetConnection(_sql, _sql, !disposing) &&
UnhookNativeCallbacks(true, !disposing))
{
if (unbindFunctions)
{
if (SQLiteFunction.UnbindAllFunctions(this, _flags, false))
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
Trace.WriteLine(HelperMethods.StringFormat(
................................................................................
#endif
SQLiteConnectionPool.Add(_fileName, _sql, _poolVersion);
SQLiteConnection.OnChanged(null, new ConnectionEventArgs(
SQLiteConnectionEventType.ClosedToPool, null, null,
null, null, _sql, _fileName, new object[] {
typeof(SQLite3), !disposing, _fileName, _poolVersion }));
#if !NET_COMPACT_20 && TRACE_CONNECTION
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Close (Pool) Success: {0}",
HandleToString()));
#endif
}
else
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Close (Pool) Failure: {0}",
HandleToString()));
#endif
//
// NOTE: This connection cannot be added to the pool;
// therefore, just use the normal disposal
// procedure on it.
//
_usePool = false;
goto retry;
}
}
else
{
/* IGNORED */
UnhookNativeCallbacks(disposing, !disposing);
if (unbindFunctions)
{
if (SQLiteFunction.UnbindAllFunctions(this, _flags, false))
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
................................................................................
{
//
// NOTE: If the database connection is currently open, attempt to
// close it now. This must be done because the file name or
// other parameters that may impact the underlying database
// connection may have changed.
//
if (_sql != null) Close(false);
//
// NOTE: If the connection was not closed successfully, throw an
// exception now.
//
if (_sql != null)
throw new SQLiteException("connection handle is still active");
................................................................................
/// <param name="func">The callback function to invoke.</param>
/// <returns>Returns a result code</returns>
internal override SQLiteErrorCode SetLogCallback(SQLiteLogCallback func)
{
SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3_config_log(
SQLiteConfigOpsEnum.SQLITE_CONFIG_LOG, func, IntPtr.Zero);
if (rc == SQLiteErrorCode.Ok)
_setLogCallback = (func != null);
return rc;
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Appends an error message and an appropriate line-ending to a <see cref="StringBuilder" />
/// instance. This is useful because the .NET Compact Framework has a slightly different set
/// of supported methods for the <see cref="StringBuilder" /> class.
/// </summary>
/// <param name="builder">
/// The <see cref="StringBuilder" /> instance to append to.
/// </param>
/// <param name="message">
/// The message to append. It will be followed by an appropriate line-ending.
/// </param>
private static void AppendError(
StringBuilder builder,
string message
)
{
if (builder == null)
return;
#if !PLATFORM_COMPACTFRAMEWORK
builder.AppendLine(message);
#else
builder.Append(message);
builder.Append("\r\n");
#endif
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// This method attempts to cause the SQLite native library to invalidate
/// its function pointers that refer to this instance. This is necessary
/// to prevent calls from native code into delegates that may have been
/// garbage collected. Normally, these types of issues can only arise for
/// connections that are added to the pool; howver, it is good practice to
/// unconditionally invalidate function pointers that may refer to objects
/// being disposed.
/// <param name="includeGlobal">
/// Non-zero to also invalidate global function pointers (i.e. those that
/// are not directly associated with this connection on the native side).
/// </param>
/// <param name="canThrow">
/// Non-zero if this method is being executed within a context where it can
/// throw an exception in the event of failure; otherwise, zero.
/// </param>
/// </summary>
/// <returns>
/// Non-zero if this method was successful; otherwise, zero.
/// </returns>
private bool UnhookNativeCallbacks(
bool includeGlobal,
bool canThrow
)
{
//
// NOTE: Initially, this method assumes success. Then, if any attempt
// to invalidate a function pointer fails, the overall result is
// set to failure. However, this will not prevent further
// attempts, if any, to invalidate subsequent function pointers.
//
bool result = true;
SQLiteErrorCode rc = SQLiteErrorCode.Ok;
StringBuilder builder = new StringBuilder();
///////////////////////////////////////////////////////////////////////////////////////////
#region Rollback Hook (Per-Connection)
try
{
SetRollbackHook(null); /* throw */
}
#if !NET_COMPACT_20 && TRACE_CONNECTION
catch (Exception e)
#else
catch (Exception)
#endif
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
try
{
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Failed to unset rollback hook: {0}",
e)); /* throw */
}
catch
{
// do nothing.
}
#endif
AppendError(builder, "failed to unset rollback hook");
rc = SQLiteErrorCode.Error;
result = false;
}
#endregion
///////////////////////////////////////////////////////////////////////////////////////////
#region Trace Callback (Per-Connection)
try
{
SetTraceCallback(null); /* throw */
}
#if !NET_COMPACT_20 && TRACE_CONNECTION
catch (Exception e)
#else
catch (Exception)
#endif
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
try
{
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Failed to unset trace callback: {0}",
e)); /* throw */
}
catch
{
// do nothing.
}
#endif
AppendError(builder, "failed to unset trace callback");
rc = SQLiteErrorCode.Error;
result = false;
}
#endregion
///////////////////////////////////////////////////////////////////////////////////////////
#region Commit Hook (Per-Connection)
try
{
SetCommitHook(null); /* throw */
}
#if !NET_COMPACT_20 && TRACE_CONNECTION
catch (Exception e)
#else
catch (Exception)
#endif
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
try
{
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Failed to unset commit hook: {0}",
e)); /* throw */
}
catch
{
// do nothing.
}
#endif
AppendError(builder, "failed to unset commit hook");
rc = SQLiteErrorCode.Error;
result = false;
}
#endregion
///////////////////////////////////////////////////////////////////////////////////////////
#region Update Hook (Per-Connection)
try
{
SetUpdateHook(null); /* throw */
}
#if !NET_COMPACT_20 && TRACE_CONNECTION
catch (Exception e)
#else
catch (Exception)
#endif
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
try
{
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Failed to unset update hook: {0}",
e)); /* throw */
}
catch
{
// do nothing.
}
#endif
AppendError(builder, "failed to unset update hook");
rc = SQLiteErrorCode.Error;
result = false;
}
#endregion
///////////////////////////////////////////////////////////////////////////////////////////
#region Authorizer Hook (Per-Connection)
try
{
SetAuthorizerHook(null); /* throw */
}
#if !NET_COMPACT_20 && TRACE_CONNECTION
catch (Exception e)
#else
catch (Exception)
#endif
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
try
{
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Failed to unset authorizer hook: {0}",
e)); /* throw */
}
catch
{
// do nothing.
}
#endif
AppendError(builder, "failed to unset authorizer hook");
rc = SQLiteErrorCode.Error;
result = false;
}
#endregion
///////////////////////////////////////////////////////////////////////////////////////////
#region Progress Hook (Per-Connection)
try
{
SetProgressHook(0, null); /* throw */
}
#if !NET_COMPACT_20 && TRACE_CONNECTION
catch (Exception e)
#else
catch (Exception)
#endif
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
try
{
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Failed to unset progress hook: {0}",
e)); /* throw */
}
catch
{
// do nothing.
}
#endif
AppendError(builder, "failed to unset progress hook");
rc = SQLiteErrorCode.Error;
result = false;
}
#endregion
///////////////////////////////////////////////////////////////////////////////////////////
#region Log Callback (Global)
//
// NOTE: We have to be careful here because the log callback
// is not per-connection on the native side. It should
// only be unset by this method if this instance was
// responsible for setting it.
//
if (includeGlobal && _setLogCallback)
{
try
{
SQLiteErrorCode rc2 = SetLogCallback(null); /* throw */
if (rc2 != SQLiteErrorCode.Ok)
{
rc = rc2;
result = false;
}
}
#if !NET_COMPACT_20 && TRACE_CONNECTION
catch (Exception e)
#else
catch (Exception)
#endif
{
#if !NET_COMPACT_20 && TRACE_CONNECTION
try
{
Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Failed to unset log callback: {0}",
e)); /* throw */
}
catch
{
// do nothing.
}
#endif
AppendError(builder, "failed to unset log callback");
rc = SQLiteErrorCode.Error;
result = false;
}
}
#endregion
///////////////////////////////////////////////////////////////////////////////////////////
if (!result && canThrow)
throw new SQLiteException(rc, builder.ToString());
return result;
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Creates a new SQLite backup object based on the provided destination
/// database connection. The source database connection is the one
/// associated with this object. The source and destination database
|
Changes to System.Data.SQLite/SQLite3_UTF16.cs.
134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 |
{
//
// NOTE: If the database connection is currently open, attempt to
// close it now. This must be done because the file name or
// other parameters that may impact the underlying database
// connection may have changed.
//
if (_sql != null) Close(true);
//
// NOTE: If the connection was not closed successfully, throw an
// exception now.
//
if (_sql != null)
throw new SQLiteException("connection handle is still active");
|
| |
134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 |
{
//
// NOTE: If the database connection is currently open, attempt to
// close it now. This must be done because the file name or
// other parameters that may impact the underlying database
// connection may have changed.
//
if (_sql != null) Close(false);
//
// NOTE: If the connection was not closed successfully, throw an
// exception now.
//
if (_sql != null)
throw new SQLiteException("connection handle is still active");
|
Changes to System.Data.SQLite/SQLiteBase.cs.
125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 |
/// <summary>
/// Closes the currently-open database.
/// </summary>
/// <remarks>
/// After the database has been closed implemeters should call SQLiteFunction.UnbindFunctions() to deallocate all interop allocated
/// memory associated with the user-defined functions and collating sequences tied to the closed connection.
/// </remarks>
/// <param name="canThrow">Non-zero if the operation is allowed to throw exceptions, zero otherwise.</param>
internal abstract void Close(bool canThrow);
/// <summary>
/// Sets the busy timeout on the connection. SQLiteCommand will call this before executing any command.
/// </summary>
/// <param name="nTimeoutMS">The number of milliseconds to wait before returning SQLITE_BUSY</param>
internal abstract void SetTimeout(int nTimeoutMS);
/// <summary>
/// Returns the text of the last error issued by SQLite
|
| | |
125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 |
/// <summary>
/// Closes the currently-open database.
/// </summary>
/// <remarks>
/// After the database has been closed implemeters should call SQLiteFunction.UnbindFunctions() to deallocate all interop allocated
/// memory associated with the user-defined functions and collating sequences tied to the closed connection.
/// </remarks>
/// <param name="disposing">Non-zero if connection is being disposed, zero otherwise.</param>
internal abstract void Close(bool disposing);
/// <summary>
/// Sets the busy timeout on the connection. SQLiteCommand will call this before executing any command.
/// </summary>
/// <param name="nTimeoutMS">The number of milliseconds to wait before returning SQLITE_BUSY</param>
internal abstract void SetTimeout(int nTimeoutMS);
/// <summary>
/// Returns the text of the last error issued by SQLite
|
Changes to System.Data.SQLite/SQLiteConnection.cs.
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|
_sql = null;
_enlistment = null;
}
#endif
if (_sql != null)
{
_sql.Close(!_disposing);
_sql = null;
}
_transactionLevel = 0;
_transactionSequence = 0;
}
StateChangeEventArgs eventArgs = null;
................................................................................
public SQLiteErrorCode Shutdown()
{
CheckDisposed();
if (_sql == null)
throw new InvalidOperationException("Database connection not valid for shutdown.");
_sql.Close(true); /* NOTE: MUST be closed before shutdown. */
SQLiteErrorCode rc = _sql.Shutdown();
#if !NET_COMPACT_20 && TRACE_CONNECTION
if (rc != SQLiteErrorCode.Ok)
System.Diagnostics.Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Shutdown (Instance) Failed: {0}", rc));
|
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_sql = null;
_enlistment = null;
}
#endif
if (_sql != null)
{
_sql.Close(_disposing);
_sql = null;
}
_transactionLevel = 0;
_transactionSequence = 0;
}
StateChangeEventArgs eventArgs = null;
................................................................................
public SQLiteErrorCode Shutdown()
{
CheckDisposed();
if (_sql == null)
throw new InvalidOperationException("Database connection not valid for shutdown.");
_sql.Close(false); /* NOTE: MUST be closed before shutdown. */
SQLiteErrorCode rc = _sql.Shutdown();
#if !NET_COMPACT_20 && TRACE_CONNECTION
if (rc != SQLiteErrorCode.Ok)
System.Diagnostics.Trace.WriteLine(HelperMethods.StringFormat(
CultureInfo.CurrentCulture,
"Shutdown (Instance) Failed: {0}", rc));
|