Esempio n. 1
0
 public static void Initialize()
 {
     if (SQLite3.StaticIsInitialized())
     {
         return;
     }
     if (!AppDomain.CurrentDomain.IsDefaultAppDomain() && UnsafeNativeMethods.GetSettingValue("Force_SQLiteLog", null) == null)
     {
         return;
     }
     lock (SQLiteLog.syncRoot)
     {
         if (SQLiteLog._domainUnload == null)
         {
             SQLiteLog._domainUnload = new EventHandler(SQLiteLog.DomainUnload);
             AppDomain.CurrentDomain.DomainUnload += SQLiteLog._domainUnload;
         }
         if (SQLiteLog._sql == null)
         {
             SQLiteLog._sql = new SQLite3(SQLiteDateFormats.ISO8601, DateTimeKind.Unspecified, null, IntPtr.Zero, null, false);
         }
         if (SQLiteLog._callback == null)
         {
             SQLiteLog._callback = new SQLiteLogCallback(SQLiteLog.LogCallback);
             SQLiteErrorCode sQLiteErrorCode = SQLiteLog._sql.SetLogCallback(SQLiteLog._callback);
             if (sQLiteErrorCode != SQLiteErrorCode.Ok)
             {
                 throw new SQLiteException(sQLiteErrorCode, "Failed to initialize logging.");
             }
         }
         SQLiteLog._enabled = true;
         SQLiteLog.AddDefaultHandler();
     }
 }
Esempio n. 2
0
 private static void DomainUnload(object sender, EventArgs e)
 {
     lock (SQLiteLog.syncRoot)
     {
         SQLiteLog.RemoveDefaultHandler();
         SQLiteLog._enabled = false;
         if (SQLiteLog._sql != null)
         {
             SQLiteErrorCode sQLiteErrorCode = SQLiteLog._sql.Shutdown();
             if (sQLiteErrorCode != SQLiteErrorCode.Ok)
             {
                 throw new SQLiteException(sQLiteErrorCode, "Failed to shutdown interface.");
             }
             sQLiteErrorCode = SQLiteLog._sql.SetLogCallback(null);
             if (sQLiteErrorCode != SQLiteErrorCode.Ok)
             {
                 throw new SQLiteException(sQLiteErrorCode, "Failed to shutdown logging.");
             }
         }
         if (SQLiteLog._callback != null)
         {
             SQLiteLog._callback = null;
         }
         if (SQLiteLog._domainUnload != null)
         {
             AppDomain.CurrentDomain.DomainUnload -= SQLiteLog._domainUnload;
             SQLiteLog._domainUnload = null;
         }
     }
 }
 public static extern SQLiteErrorCode sqlite3_config_log_arm64(SQLiteConfigOpsEnum op, IntPtr p2, IntPtr p3, IntPtr p4, IntPtr p5, IntPtr p6, IntPtr p7, IntPtr p8, SQLiteLogCallback func, IntPtr pvUser);
Esempio n. 4
0
        ///////////////////////////////////////////////////////////////////////

#if !PLATFORM_COMPACTFRAMEWORK
        /// <summary>
        /// Handles the AppDomain being unloaded.
        /// </summary>
        /// <param name="sender">Should be null.</param>
        /// <param name="e">The data associated with this event.</param>
        private static void DomainUnload(
            object sender,
            EventArgs e
            )
        {
            lock (syncRoot)
            {
                //
                // NOTE: Remove the default log event handler.
                //
                RemoveDefaultHandler();

                //
                // NOTE: Disable logging.  If necessary, it can be re-enabled
                //       later by the Initialize method.
                //
                _enabled = false;

#if !USE_INTEROP_DLL || !INTEROP_LOG
                //
                // BUGBUG: This will cause serious problems if other AppDomains
                //         have any open SQLite connections; however, there is
                //         currently no way around this limitation.
                //
                if (_sql != null)
                {
                    SQLiteErrorCode rc = _sql.Shutdown();

                    if (rc != SQLiteErrorCode.Ok)
                    {
                        throw new SQLiteException(rc,
                                                  "Failed to shutdown interface.");
                    }

                    rc = _sql.SetLogCallback(null);

                    if (rc != SQLiteErrorCode.Ok)
                    {
                        throw new SQLiteException(rc,
                                                  "Failed to shutdown logging.");
                    }
                }

                //
                // BUGFIX: Make sure to reset the callback for next time.  This
                //         must be done after it has been succesfully removed
                //         as logging callback by the SQLite core library as we
                //         cannot allow native code to refer to a delegate that
                //         has been garbage collected.
                //
                if (_callback != null)
                {
                    _callback = null;
                }
#endif

                //
                // NOTE: Remove the event handler for the DomainUnload event
                //       that we added earlier.
                //
                if (_domainUnload != null)
                {
                    AppDomain.CurrentDomain.DomainUnload -= _domainUnload;
                    _domainUnload = null;
                }
            }
        }
Esempio n. 5
0
        ///////////////////////////////////////////////////////////////////////

        /// <summary>
        /// Initializes the SQLite logging facilities.
        /// </summary>
        /// <param name="className">
        /// The name of the managed class that called this method.  This
        /// parameter may be null.
        /// </param>
        internal static void Initialize(
            string className
            )
        {
            //
            // NOTE: See if the logging subsystem has been totally disabled.
            //       If so, do nothing.
            //
            if (UnsafeNativeMethods.GetSettingValue(
                    "No_SQLiteLog", null) != null)
            {
                return;
            }

            ///////////////////////////////////////////////////////////////

            //
            // NOTE: Keep track of exactly how many times this method is
            //       called (i.e. per-AppDomain, of course).
            //
            Interlocked.Increment(ref _initializeCallCount);

            ///////////////////////////////////////////////////////////////

            //
            // NOTE: First, check if the managed logging subsystem is always
            //       supposed to at least attempt to initialize itself.  In
            //       order to do this, several fairly complex steps must be
            //       taken, including calling a P/Invoke (interop) method;
            //       therefore, by default, attempt to perform these steps
            //       once.
            //
            if (UnsafeNativeMethods.GetSettingValue(
                    "Initialize_SQLiteLog", null) == null)
            {
                if (Interlocked.Increment(ref _attemptedInitialize) > 1)
                {
                    Interlocked.Decrement(ref _attemptedInitialize);
                    return;
                }
            }

            ///////////////////////////////////////////////////////////////////

            //
            // BUFXIX: Cannot initialize the logging interface if the SQLite
            //         core library has already been initialized anywhere in
            //         the process (see ticket [2ce0870fad]).
            //
            if (SQLite3.StaticIsInitialized())
            {
                return;
            }

            ///////////////////////////////////////////////////////////////////

#if !PLATFORM_COMPACTFRAMEWORK
            //
            // BUGFIX: To avoid nasty situations where multiple AppDomains are
            //         attempting to initialize and/or shutdown what is really
            //         a shared native resource (i.e. the SQLite core library
            //         is loaded per-process and has only one logging callback,
            //         not one per-AppDomain, which it knows nothing about),
            //         prevent all non-default AppDomains from registering a
            //         log handler unless the "Force_SQLiteLog" environment
            //         variable is used to manually override this safety check.
            //
            if (!AppDomain.CurrentDomain.IsDefaultAppDomain() &&
                UnsafeNativeMethods.GetSettingValue("Force_SQLiteLog", null) == null)
            {
                return;
            }
#endif

            ///////////////////////////////////////////////////////////////////

            lock (syncRoot)
            {
#if !PLATFORM_COMPACTFRAMEWORK
                //
                // NOTE: Add an event handler for the DomainUnload event so
                //       that we can unhook our logging managed function
                //       pointer from the native SQLite code prior to it
                //       being invalidated.
                //
                // BUGFIX: Make sure this event handler is only added one
                //         time (per-AppDomain).
                //
                if (_domainUnload == null)
                {
                    _domainUnload = new EventHandler(DomainUnload);
                    AppDomain.CurrentDomain.DomainUnload += _domainUnload;
                }
#endif

                ///////////////////////////////////////////////////////////////

#if USE_INTEROP_DLL && INTEROP_LOG
                //
                // NOTE: Attempt to setup interop assembly log callback.
                //       This may fail, e.g. if the SQLite core library
                //       has somehow been initialized.  An exception will
                //       be raised in that case.
                //
                SQLiteErrorCode rc = SQLite3.ConfigureLogForInterop(
                    className);

                if (rc != SQLiteErrorCode.Ok)
                {
                    throw new SQLiteException(rc,
                                              "Failed to configure interop assembly logging.");
                }
#else
                //
                // NOTE: Create an instance of the SQLite wrapper class.
                //
                if (_sql == null)
                {
                    _sql = new SQLite3(
                        SQLiteDateFormats.Default, DateTimeKind.Unspecified,
                        null, IntPtr.Zero, null, false);
                }

                //
                // NOTE: Create a single "global" (i.e. per-process) callback
                //       to register with SQLite.  This callback will pass the
                //       event on to any registered handler.  We only want to
                //       do this once.
                //
                if (_callback == null)
                {
                    _callback = new SQLiteLogCallback(LogCallback);

                    SQLiteErrorCode rc = _sql.SetLogCallback(_callback);

                    if (rc != SQLiteErrorCode.Ok)
                    {
                        _callback = null; /* UNDO */

                        throw new SQLiteException(rc,
                                                  "Failed to configure managed assembly logging.");
                    }
                }
#endif

                ///////////////////////////////////////////////////////////////

                //
                // NOTE: Logging is enabled by default unless the configuration
                //       setting "Disable_SQLiteLog" is present.
                //
                if (UnsafeNativeMethods.GetSettingValue(
                        "Disable_SQLiteLog", null) == null)
                {
                    _enabled = true;
                }

                ///////////////////////////////////////////////////////////////

                //
                // NOTE: For now, always setup the default log event handler.
                //
                AddDefaultHandler();
            }
        }
Esempio n. 6
0
    /// <summary>
    /// Allows the setting of a logging callback invoked by SQLite when a
    /// log event occurs.  Only one callback may be set.  If NULL is passed,
    /// the logging callback is unregistered.
    /// </summary>
    /// <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;
    }
		public static extern SQLiteErrorCode sqlite3_config_log_arm64(SQLiteConfigOpsEnum op, IntPtr p2, IntPtr p3, IntPtr p4, IntPtr p5, IntPtr p6, IntPtr p7, IntPtr p8, SQLiteLogCallback func, IntPtr pvUser);
Esempio n. 8
0
 internal abstract int SetLogCallback(SQLiteLogCallback func);
 internal abstract SQLiteErrorCode SetLogCallback(SQLiteLogCallback func);
Esempio n. 10
0
        ///////////////////////////////////////////////////////////////////////

#if !PLATFORM_COMPACTFRAMEWORK
        /// <summary>
        /// Handles the AppDomain being unloaded.
        /// </summary>
        /// <param name="sender">Should be null.</param>
        /// <param name="e">The data associated with this event.</param>
        private static void DomainUnload(
            object sender,
            EventArgs e
            )
        {
            lock (syncRoot)
            {
                //
                // NOTE: Remove the default log event handler.
                //
                RemoveDefaultHandler();

                //
                // NOTE: Disable logging.  If necessary, it can be re-enabled
                //       later by the Initialize method.
                //
                _enabled = false;

#if !INTEROP_LOG
                //
                // BUGBUG: This will cause serious problems if other AppDomains
                //         have any open SQLite connections; however, there is
                //         currently no way around this limitation.
                //
                if (_sql != null)
                {
                    SQLiteErrorCode rc = _sql.Shutdown();

                    if (rc != SQLiteErrorCode.Ok)
                        throw new SQLiteException(rc,
                            "Failed to shutdown interface.");

                    rc = _sql.SetLogCallback(null);

                    if (rc != SQLiteErrorCode.Ok)
                        throw new SQLiteException(rc,
                            "Failed to shutdown logging.");
                }

                //
                // BUGFIX: Make sure to reset the callback for next time.  This
                //         must be done after it has been succesfully removed
                //         as logging callback by the SQLite core library as we
                //         cannot allow native code to refer to a delegate that
                //         has been garbage collected.
                //
                if (_callback != null)
                {
                    _callback = null;
                }
#endif

                //
                // NOTE: Remove the event handler for the DomainUnload event
                //       that we added earlier.
                //
                if (_domainUnload != null)
                {
                    AppDomain.CurrentDomain.DomainUnload -= _domainUnload;
                    _domainUnload = null;
                }
            }
        }
Esempio n. 11
0
        ///////////////////////////////////////////////////////////////////////

        /// <summary>
        /// Initializes the SQLite logging facilities.
        /// </summary>
        public static void Initialize()
        {
            //
            // BUFXIX: We cannot initialize the logging interface if the SQLite
            //         core library has already been initialized anywhere in
            //         the process (see ticket [2ce0870fad]).
            //
            if (SQLite3.StaticIsInitialized())
                return;

#if !PLATFORM_COMPACTFRAMEWORK
            //
            // BUGFIX: To avoid nasty situations where multiple AppDomains are
            //         attempting to initialize and/or shutdown what is really
            //         a shared native resource (i.e. the SQLite core library
            //         is loaded per-process and has only one logging callback,
            //         not one per-AppDomain, which it knows nothing about),
            //         prevent all non-default AppDomains from registering a
            //         log handler unless the "Force_SQLiteLog" environment
            //         variable is used to manually override this safety check.
            //
            if (!AppDomain.CurrentDomain.IsDefaultAppDomain() &&
                UnsafeNativeMethods.GetSettingValue("Force_SQLiteLog", null) == null)
            {
                return;
            }
#endif

            lock (syncRoot)
            {
#if !PLATFORM_COMPACTFRAMEWORK
                //
                // NOTE: Add an event handler for the DomainUnload event so
                //       that we can unhook our logging managed function
                //       pointer from the native SQLite code prior to it
                //       being invalidated.
                //
                // BUGFIX: Make sure this event handler is only added one
                //         time (per-AppDomain).
                //
                if (_domainUnload == null)
                {
                    _domainUnload = new EventHandler(DomainUnload);
                    AppDomain.CurrentDomain.DomainUnload += _domainUnload;
                }
#endif

#if !INTEROP_LOG
                //
                // NOTE: Create an instance of the SQLite wrapper class.
                //
                if (_sql == null)
                {
                    _sql = new SQLite3(
                        SQLiteDateFormats.Default, DateTimeKind.Unspecified,
                        null, IntPtr.Zero, null, false);
                }

                //
                // NOTE: Create a single "global" (i.e. per-process) callback
                //       to register with SQLite.  This callback will pass the
                //       event on to any registered handler.  We only want to
                //       do this once.
                //
                if (_callback == null)
                {
                    _callback = new SQLiteLogCallback(LogCallback);

                    SQLiteErrorCode rc = _sql.SetLogCallback(_callback);

                    if (rc != SQLiteErrorCode.Ok)
                        throw new SQLiteException(rc,
                            "Failed to initialize logging.");
                }
#endif

                //
                // NOTE: Logging is enabled by default.
                //
                _enabled = true;

                //
                // NOTE: For now, always setup the default log event handler.
                //
                AddDefaultHandler();
            }
        }
Esempio n. 12
0
 internal abstract SQLiteErrorCode SetLogCallback(SQLiteLogCallback func);
    /// <summary>
    /// Opens the connection using the parameters found in the <see cref="ConnectionString">ConnectionString</see>
    /// </summary>
    public override void Open()
    {
      if (_connectionState != ConnectionState.Closed)
        throw new InvalidOperationException();

      Close();

      SortedList<string, string> opts = ParseConnectionString(_connectionString);
      string fileName;

      if (Convert.ToInt32(FindKey(opts, "Version", "3"), CultureInfo.InvariantCulture) != 3)
        throw new NotSupportedException("Only SQLite Version 3 is supported at this time");

      fileName = FindKey(opts, "Data Source", "");

      if (String.IsNullOrEmpty(fileName))
      {
        fileName = FindKey(opts, "Uri", "");
        if (String.IsNullOrEmpty(fileName))
          throw new ArgumentException("Data Source cannot be empty.  Use :memory: to open an in-memory database");
        else
          fileName = MapUriPath(fileName);
      }

      if (String.Compare(fileName, ":MEMORY:", StringComparison.OrdinalIgnoreCase) == 0)
        fileName = ":memory:";
      else
      {
#if PLATFORM_COMPACTFRAMEWORK
       if (fileName.StartsWith(".\\"))
         fileName = Path.GetDirectoryName(System.Reflection.Assembly.GetCallingAssembly().GetName().CodeBase) + fileName.Substring(1);
#endif
       fileName = ExpandFileName(fileName);
      }
      try
      {
        bool usePooling = (SQLiteConvert.ToBoolean(FindKey(opts, "Pooling", Boolean.FalseString)) == true);
        int maxPoolSize = Convert.ToInt32(FindKey(opts, "Max Pool Size", "100"), CultureInfo.InvariantCulture);

        _defaultTimeout = Convert.ToInt32(FindKey(opts, "Default Timeout", "30"), CultureInfo.CurrentCulture);

        _defaultIsolation = (IsolationLevel)Enum.Parse(typeof(IsolationLevel), FindKey(opts, "Default IsolationLevel", "Serializable"), true);
        if (_defaultIsolation != IsolationLevel.Serializable && _defaultIsolation != IsolationLevel.ReadCommitted)
          throw new NotSupportedException("Invalid Default IsolationLevel specified");

        //string temp = FindKey(opts, "DateTimeFormat", "ISO8601");
        //if (String.Compare(temp, "ticks", StringComparison.OrdinalIgnoreCase) == 0) dateFormat = SQLiteDateFormats.Ticks;
        //else if (String.Compare(temp, "julianday", StringComparison.OrdinalIgnoreCase) == 0) dateFormat = SQLiteDateFormats.JulianDay;

        if (_sql == null)
        {
          bool bUTF16 = (SQLiteConvert.ToBoolean(FindKey(opts, "UseUTF16Encoding", Boolean.FalseString)) == true);
          SQLiteDateFormats dateFormat = (SQLiteDateFormats)Enum.Parse(typeof(SQLiteDateFormats),
                                                                       FindKey(opts, "DateTimeFormat", "ISO8601"),
                                                                       true);

          if (bUTF16) // SQLite automatically sets the encoding of the database to UTF16 if called from sqlite3_open16()
            _sql = new SQLite3_UTF16(dateFormat);
          else
            _sql = new SQLite3(dateFormat);

          if (_sql != null && _logHandler != null)
          {
              if (_logCallback == null) _logCallback = new SQLiteLogCallback(LogCallback);
              if (_logCallback != null) _sql.SetLogCallback(_logCallback);
          }
        }

        SQLiteOpenFlagsEnum flags = SQLiteOpenFlagsEnum.None;

        if (SQLiteConvert.ToBoolean(FindKey(opts, "FailIfMissing", Boolean.FalseString)) == false)
          flags |= SQLiteOpenFlagsEnum.Create;

        if (SQLiteConvert.ToBoolean(FindKey(opts, "Read Only", Boolean.FalseString)) == true)
        {
          flags |= SQLiteOpenFlagsEnum.ReadOnly;
          // SQLite will return SQLITE_MISUSE on ReadOnly and Create
          flags &= ~SQLiteOpenFlagsEnum.Create;
        }
        else
        {
          flags |= SQLiteOpenFlagsEnum.ReadWrite;
        }

        _sql.Open(fileName, flags, maxPoolSize, usePooling);

        _binaryGuid = (SQLiteConvert.ToBoolean(FindKey(opts, "BinaryGUID", Boolean.TrueString)) == true);

        string password = FindKey(opts, "Password", null);

        if (String.IsNullOrEmpty(password) == false)
          _sql.SetPassword(System.Text.UTF8Encoding.UTF8.GetBytes(password));
        else if (_password != null)
          _sql.SetPassword(_password);
        _password = null;

        _dataSource = Path.GetFileNameWithoutExtension(fileName);

        _version++;

        ConnectionState oldstate = _connectionState;
        _connectionState = ConnectionState.Open;
        try
        {
          using (SQLiteCommand cmd = CreateCommand())
          {
            string defValue;

            if (fileName != ":memory:")
            {
              defValue = FindKey(opts, "Page Size", "1024");
              if (Convert.ToInt32(defValue, CultureInfo.InvariantCulture) != 1024)
              {
                cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA page_size={0}", defValue);
                cmd.ExecuteNonQuery();
              }
            }

            defValue = FindKey(opts, "Max Page Count", "0");
            if (Convert.ToInt32(defValue, CultureInfo.InvariantCulture) != 0)
            {
              cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA max_page_count={0}", defValue);
              cmd.ExecuteNonQuery();
            }

            defValue = FindKey(opts, "Legacy Format", Boolean.FalseString);
            cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA legacy_file_format={0}", SQLiteConvert.ToBoolean(defValue) == true ? "ON" : "OFF");
            cmd.ExecuteNonQuery();

            defValue = FindKey(opts, "Synchronous", "Normal");
            if (String.Compare(defValue, "Full", StringComparison.OrdinalIgnoreCase) != 0)
            {
              cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA synchronous={0}", defValue);
              cmd.ExecuteNonQuery();
            }

            defValue = FindKey(opts, "Cache Size", "2000");
            if (Convert.ToInt32(defValue, CultureInfo.InvariantCulture) != 2000)
            {
              cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA cache_size={0}", defValue);
              cmd.ExecuteNonQuery();
            }

            defValue = FindKey(opts, "Journal Mode", "Delete");
            if (String.Compare(defValue, "Default", StringComparison.OrdinalIgnoreCase) != 0)
            {
              cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA journal_mode={0}", defValue);
              cmd.ExecuteNonQuery();
            }

            defValue = FindKey(opts, "Foreign Keys", Boolean.FalseString);
            cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA foreign_keys={0}", SQLiteConvert.ToBoolean(defValue) == true ? "ON" : "OFF");
            cmd.ExecuteNonQuery();
          }

          if (_commitHandler != null)
            _sql.SetCommitHook(_commitCallback);

          if (_updateHandler != null)
            _sql.SetUpdateHook(_updateCallback);

          if (_rollbackHandler != null)
            _sql.SetRollbackHook(_rollbackCallback);

#if !PLATFORM_COMPACTFRAMEWORK
          if (Transactions.Transaction.Current != null && SQLiteConvert.ToBoolean(FindKey(opts, "Enlist", Boolean.TrueString)) == true)
            EnlistTransaction(Transactions.Transaction.Current);
#endif

          _connectionState = oldstate;
          OnStateChange(ConnectionState.Open);
        }
        catch
        {
          _connectionState = oldstate;
          throw;
        }
      }
      catch (SQLiteException)
      {
        Close();
        throw;
      }
    }
Esempio n. 14
0
    /// <summary>
    /// Allows the setting of a logging callback invoked by SQLite when a
    /// log event occurs.  Only one callback may be set.  If NULL is passed,
    /// the logging callback is unregistered.
    /// </summary>
    /// <param name="func">The callback function to invoke.</param>
    /// <returns>Returns a result code</returns>
    internal override int SetLogCallback(SQLiteLogCallback func)
    {
        //int rc = UnsafeNativeMethods.sqlite3_config(
        //    (int)SQLiteConfigOpsEnum.SQLITE_CONFIG_LOG, func, (IntPtr)0);

        return 0;
    }
 internal static extern SQLiteErrorCode sqlite3_config_log(SQLiteConfigOpsEnum op, SQLiteLogCallback func, IntPtr pvUser);
Esempio n. 16
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 public static extern SQLiteErrorCode sqlite3_config_log(SQLiteConfigOpsEnum op, SQLiteLogCallback func, IntPtr pvUser);
Esempio n. 17
0
        /// <summary>
        /// Initializes the SQLite logging facilities.
        /// </summary>
        public static void Initialize()
        {
            //
            // BUFXIX: We cannot initialize the logging interface if the SQLite
            //         core library has already been initialized anywhere in
            //         the process (see ticket [2ce0870fad]).
            //
            if (SQLite3.StaticIsInitialized())
            {
                return;
            }

            //
            // BUGFIX: To avoid nasty situations where multiple AppDomains are
            //         attempting to initialize and/or shutdown what is really
            //         a shared native resource (i.e. the SQLite core library
            //         is loaded per-process and has only one logging callback,
            //         not one per-AppDomain, which it knows nothing about),
            //         prevent all non-default AppDomains from registering a
            //         log handler unless the "Force_SQLiteLog" environment
            //         variable is used to manually override this safety check.
            //
            if (!AppDomain.CurrentDomain.IsDefaultAppDomain() &&
                Environment.GetEnvironmentVariable("Force_SQLiteLog") == null)
            {
                return;
            }

            lock (syncRoot)
            {
                //
                // NOTE: Add an event handler for the DomainUnload event so
                //       that we can unhook our logging managed function
                //       pointer from the native SQLite code prior to it
                //       being invalidated.
                //
                // BUGFIX: Make sure this event handler is only added one
                //         time (per-AppDomain).
                //
                if (_domainUnload == null)
                {
                    _domainUnload = new EventHandler(DomainUnload);
                    AppDomain.CurrentDomain.DomainUnload += _domainUnload;
                }

                //
                // NOTE: Create an instance of the SQLite wrapper class.
                //
                if (_sql == null)
                {
                    _sql = new SQLite3(SQLiteDateFormats.Default,
                                       DateTimeKind.Unspecified);
                }

                //
                // NOTE: Create a single "global" (i.e. per-process) callback
                //       to register with SQLite.  This callback will pass the
                //       event on to any registered handler.  We only want to
                //       do this once.
                //
                if (_callback == null)
                {
                    _callback = new SQLiteLogCallback(LogCallback);

                    SQLiteErrorCode rc = _sql.SetLogCallback(_callback);

                    if (rc != SQLiteErrorCode.Ok)
                    {
                        throw new SQLiteException(rc,
                                                  "Failed to initialize logging.");
                    }
                }

                //
                // NOTE: Logging is enabled by default.
                //
                _enabled = true;

                //
                // NOTE: For now, always setup the default log event handler.
                //
                AddDefaultHandler();
            }
        }
Esempio n. 18
0
 internal abstract int SetLogCallback(SQLiteLogCallback func);
Esempio n. 19
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 internal static extern int sqlite3_config(int op, SQLiteLogCallback func, IntPtr pvUser);
 internal static extern int sqlite3_config(int op, SQLiteLogCallback func, IntPtr pvUser);
Esempio n. 21
0
        /// <summary>
        /// Allows the setting of a logging callback invoked by SQLite when a
        /// log event occurs.  Only one callback may be set.  If NULL is passed,
        /// the logging callback is unregistered.
        /// </summary>
        /// <param name="func">The callback function to invoke.</param>
        /// <returns>Returns a result code</returns>
        internal override int SetLogCallback(SQLiteLogCallback func)
        {
            int rc = UnsafeNativeMethods.sqlite3_config((int)SQLiteConfigOpsEnum.SQLITE_CONFIG_LOG, func, (IntPtr)0);

            return(rc);
        }