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Overview
| Comment: | Refactor native library pre-loading code to be more flexible. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | refactorNativeLibraryPreLoader |
| Files: | files | file ages | folders |
| SHA1: |
77a0e66f105534c8cc6109de764b6403 |
| User & Date: | mistachkin 2013-12-26 04:01:18 |
Context
|
2013-12-26
| ||
| 23:48 | More work-in-progress on refactoring the native library pre-loader. check-in: 60011bd9e5 user: mistachkin tags: refactorNativeLibraryPreLoader | |
| 04:01 | Refactor native library pre-loading code to be more flexible. check-in: 77a0e66f10 user: mistachkin tags: refactorNativeLibraryPreLoader | |
| 00:57 | Fix HTML entity escaping in the environment variable documentation page. check-in: 2f18d24bcc user: mistachkin tags: trunk | |
Changes
Changes to System.Data.SQLite/SQLiteConnection.cs.
1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 |
int n;
SortedList<string, string> ls = new SortedList<string, string>(StringComparer.OrdinalIgnoreCase);
// First split into semi-colon delimited values.
string error = null;
string[] arParts;
#if !PLATFORM_COMPACTFRAMEWORK
if (Environment.GetEnvironmentVariable("No_SQLiteConnectionNewParser") != null)
arParts = SQLiteConvert.Split(s, ';');
else
#endif
arParts = SQLiteConvert.NewSplit(s, ';', true, ref error);
if (arParts == null)
{
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture,
"Invalid ConnectionString format, cannot parse: {0}", (error != null) ?
error : "could not split connection string into properties"));
|
< | < |
1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 |
int n;
SortedList<string, string> ls = new SortedList<string, string>(StringComparer.OrdinalIgnoreCase);
// First split into semi-colon delimited values.
string error = null;
string[] arParts;
if (UnsafeNativeMethods.GetVariableValue("No_SQLiteConnectionNewParser") != null)
arParts = SQLiteConvert.Split(s, ';');
else
arParts = SQLiteConvert.NewSplit(s, ';', true, ref error);
if (arParts == null)
{
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture,
"Invalid ConnectionString format, cannot parse: {0}", (error != null) ?
error : "could not split connection string into properties"));
|
Changes to System.Data.SQLite/SQLiteFunction.cs.
653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 |
try
{
#if !PLATFORM_COMPACTFRAMEWORK
//
// NOTE: If the "No_SQLiteFunctions" environment variable is set,
// skip all our special code and simply return.
//
if (Environment.GetEnvironmentVariable("No_SQLiteFunctions") != null)
return;
SQLiteFunctionAttribute at;
System.Reflection.Assembly[] arAssemblies = System.AppDomain.CurrentDomain.GetAssemblies();
int w = arAssemblies.Length;
System.Reflection.AssemblyName sqlite = System.Reflection.Assembly.GetExecutingAssembly().GetName();
|
| |
653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 |
try
{
#if !PLATFORM_COMPACTFRAMEWORK
//
// NOTE: If the "No_SQLiteFunctions" environment variable is set,
// skip all our special code and simply return.
//
if (UnsafeNativeMethods.GetVariableValue("No_SQLiteFunctions") != null)
return;
SQLiteFunctionAttribute at;
System.Reflection.Assembly[] arAssemblies = System.AppDomain.CurrentDomain.GetAssemblies();
int w = arAssemblies.Length;
System.Reflection.AssemblyName sqlite = System.Reflection.Assembly.GetExecutingAssembly().GetName();
|
Changes to System.Data.SQLite/SQLiteLog.cs.
148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 |
// 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;
}
#endif
lock (syncRoot)
{
|
| |
148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 |
// 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.GetVariableValue("Force_SQLiteLog") == null)
{
return;
}
#endif
lock (syncRoot)
{
|
Changes to System.Data.SQLite/UnsafeNativeMethods.cs.
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#endif
using System.Runtime.InteropServices;
#if !PLATFORM_COMPACTFRAMEWORK || COUNT_HANDLE
using System.Threading;
#endif
#if !PLATFORM_COMPACTFRAMEWORK && !DEBUG
[SuppressUnmanagedCodeSecurity]
#endif
internal static class UnsafeNativeMethods
{
#region Critical Handle Counts (Debug Build Only)
................................................................................
#if SQLITE_STANDARD || USE_INTEROP_DLL || PLATFORM_COMPACTFRAMEWORK
//
// NOTE: Only compile in the native library pre-load code if the feature
// has been enabled for this build.
//
#if PRELOAD_NATIVE_LIBRARY
#if !PLATFORM_COMPACTFRAMEWORK
/// <summary>
/// The name of the environment variable containing the processor
/// architecture of the current process.
/// </summary>
private static readonly string PROCESSOR_ARCHITECTURE =
"PROCESSOR_ARCHITECTURE";
#endif
/////////////////////////////////////////////////////////////////////////
private static readonly string DllFileExtension = ".dll";
/////////////////////////////////////////////////////////////////////////
/// <summary>
/// This is the P/Invoke method that wraps the native Win32 LoadLibrary
/// function. See the MSDN documentation for full details on what it
/// does.
/// </summary>
................................................................................
/////////////////////////////////////////////////////////////////////////
/// <summary>
/// Attempts to initialize this class by pre-loading the native SQLite
/// library for the processor architecture of the current process.
/// </summary>
internal static void Initialize()
{
#if !PLATFORM_COMPACTFRAMEWORK
//
// NOTE: If the "No_PreLoadSQLite" environment variable is set (to
// anything), skip all our special code and simply return.
//
if (Environment.GetEnvironmentVariable("No_PreLoadSQLite") != null)
return;
#endif
lock (staticSyncRoot)
{
//
// TODO: Make sure this list is updated if the supported
// processor architecture names and/or platform names
// changes.
................................................................................
if (_SQLiteModule == IntPtr.Zero)
_SQLiteModule = PreLoadSQLiteDll(null, null);
}
}
/////////////////////////////////////////////////////////////////////////
/// <summary>
/// Queries and returns the base directory of the current application
/// domain.
/// </summary>
/// <returns>
/// The base directory for the current application domain -OR- null if it
/// cannot be determined.
/// </returns>
private static string GetBaseDirectory()
{
#if !PLATFORM_COMPACTFRAMEWORK
//
// NOTE: If the "PreLoadSQLite_BaseDirectory" environment variable
// is set, use it verbatim for the base directory.
//
string directory = Environment.GetEnvironmentVariable(
"PreLoadSQLite_BaseDirectory");
if (directory != null)
return directory;
//
// NOTE: If the "PreLoadSQLite_UseAssemblyDirectory" environment
// variable is set (to anything), attempt to use the directory
// containing the currently executing assembly (i.e.
// System.Data.SQLite) intsead of the application domain base
// directory.
//
if (Environment.GetEnvironmentVariable(
"PreLoadSQLite_UseAssemblyDirectory") != null)
{
try
{
Assembly assembly = Assembly.GetExecutingAssembly();
if (assembly != null)
{
directory = Path.GetDirectoryName(assembly.Location);
if (!String.IsNullOrEmpty(directory))
return directory;
}
}
catch
{
// do nothing.
}
}
//
// NOTE: Otherwise, fallback on using the base directory of the
// current application domain.
//
return AppDomain.CurrentDomain.BaseDirectory;
#else
Assembly assembly = Assembly.GetExecutingAssembly();
if (assembly == null)
return null;
AssemblyName assemblyName = assembly.GetName();
if (assemblyName == null)
return null;
try
{
return Path.GetDirectoryName(assemblyName.CodeBase);
}
catch
{
// do nothing.
}
return null;
#endif
}
/////////////////////////////////////////////////////////////////////////
/// <summary>
/// Determines if the dynamic link library file name requires a suffix
/// and adds it if necessary.
................................................................................
/// </summary>
/// <returns>
/// The processor architecture of the current process -OR- null if it
/// cannot be determined.
/// </returns>
private static string GetProcessorArchitecture()
{
#if !PLATFORM_COMPACTFRAMEWORK
//
// NOTE: If the "PreLoadSQLite_ProcessorArchitecture" environment
// variable is set, use it verbatim for the current processor
// architecture.
//
string processorArchitecture = Environment.GetEnvironmentVariable(
"PreLoadSQLite_ProcessorArchitecture");
if (processorArchitecture != null)
return processorArchitecture;
//
// BUGBUG: Will this always be reliable?
//
processorArchitecture = Environment.GetEnvironmentVariable(
PROCESSOR_ARCHITECTURE);
//
// HACK: Check for an "impossible" situation. If the pointer size
// is 32-bits, the processor architecture cannot be "AMD64".
// In that case, we are almost certainly hitting a bug in the
// operating system and/or Visual Studio that causes the
// PROCESSOR_ARCHITECTURE environment variable to contain the
// wrong value in some circumstances. Please refer to ticket
................................................................................
// NOTE: We know that operating systems that return "AMD64" as
// the processor architecture are actually a superset of
// the "x86" processor architecture; therefore, return
// "x86" when the pointer size is 32-bits.
//
processorArchitecture = "x86";
//
// NOTE: Show that we hit a fairly unusual situation (i.e. the
// "wrong" processor architecture was detected).
//
#if !NET_COMPACT_20 && TRACE_PRELOAD
Trace.WriteLine(String.Format(
CultureInfo.CurrentCulture,
"Detected {0}-bit pointer size with processor architecture " +
"\"{1}\", using processor architecture \"{2}\" instead...",
IntPtr.Size * 8 /* bits */, savedProcessorArchitecture,
processorArchitecture));
#endif
}
return processorArchitecture;
#else
//
// NOTE: On the .NET Compact Framework, attempt to use the native
// Win32 API function (via P/Invoke) that can provide us with
// the processor architecture.
//
try
{
................................................................................
// the structure.
//
GetSystemInfo(out systemInfo);
//
// NOTE: Return the processor architecture value as a string.
//
return systemInfo.wProcessorArchitecture.ToString();
}
catch
{
// do nothing.
}
//
// NOTE: Upon failure, return an empty string.
//
return String.Empty;
#endif
}
/////////////////////////////////////////////////////////////////////////
/// <summary>
/// Given the processor architecture, returns the name of the platform.
/// </summary>
/// <param name="processorArchitecture">
................................................................................
/// </returns>
private static IntPtr PreLoadSQLiteDll(
string directory,
string processorArchitecture
)
{
//
// NOTE: If the specified base directory is null, use the default.
//
if (directory == null)
directory = GetBaseDirectory();
//
// NOTE: If we failed to query the base directory, stop now.
//
................................................................................
// NOTE: If the file does not exist, skip trying to load it.
//
if (!File.Exists(fileName))
return IntPtr.Zero;
}
try
{
//
// NOTE: Show exactly where we are trying to load the native
// SQLite library from.
//
#if !NET_COMPACT_20 && TRACE_PRELOAD
Trace.WriteLine(String.Format(
CultureInfo.CurrentCulture,
"Trying to load native SQLite library \"{0}\"...",
fileName));
#endif
//
// NOTE: Attempt to load the native library. This will either
// return a valid native module handle, return IntPtr.Zero,
// or throw an exception.
//
................................................................................
{
#if !NET_COMPACT_20 && TRACE_PRELOAD
try
{
//
// NOTE: First, grab the last Win32 error number.
//
int lastError = Marshal.GetLastWin32Error();
//
// NOTE: Show where we failed to load the native SQLite
// library from along with the Win32 error code and
// exception information.
//
Trace.WriteLine(String.Format(
CultureInfo.CurrentCulture,
"Failed to load native SQLite library \"{0}\" " +
"(getLastError = {1}): {2}",
fileName, lastError, e)); /* throw */
}
catch
{
// do nothing.
}
#endif
................................................................................
SQLiteBase.CloseConnection(this, localHandle);
#endif
#if !NET_COMPACT_20 && TRACE_HANDLE
try
{
Trace.WriteLine(String.Format(
"CloseConnection: {0}", localHandle));
}
catch
{
}
#endif
#else
lock (syncRoot)
................................................................................
#endif
{
#if !NET_COMPACT_20 && TRACE_HANDLE
try
{
Trace.WriteLine(String.Format(
"CloseConnection: {0}, exception: {1}",
handle, e));
}
catch
{
}
#endif
}
finally
................................................................................
if (localHandle != IntPtr.Zero)
SQLiteBase.FinalizeStatement(cnn, localHandle);
#if !NET_COMPACT_20 && TRACE_HANDLE
try
{
Trace.WriteLine(String.Format(
"FinalizeStatement: {0}", localHandle));
}
catch
{
}
#endif
#else
lock (syncRoot)
................................................................................
#endif
{
#if !NET_COMPACT_20 && TRACE_HANDLE
try
{
Trace.WriteLine(String.Format(
"FinalizeStatement: {0}, exception: {1}",
handle, e));
}
catch
{
}
#endif
}
finally
................................................................................
if (localHandle != IntPtr.Zero)
SQLiteBase.FinishBackup(cnn, localHandle);
#if !NET_COMPACT_20 && TRACE_HANDLE
try
{
Trace.WriteLine(String.Format(
"FinishBackup: {0}", localHandle));
}
catch
{
}
#endif
#else
lock (syncRoot)
................................................................................
#endif
{
#if !NET_COMPACT_20 && TRACE_HANDLE
try
{
Trace.WriteLine(String.Format(
"FinishBackup: {0}, exception: {1}",
handle, e));
}
catch
{
}
#endif
}
finally
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#endif using System.Runtime.InteropServices; #if !PLATFORM_COMPACTFRAMEWORK || COUNT_HANDLE using System.Threading; #endif using System.Xml; #if !PLATFORM_COMPACTFRAMEWORK && !DEBUG [SuppressUnmanagedCodeSecurity] #endif internal static class UnsafeNativeMethods { #region Critical Handle Counts (Debug Build Only) ................................................................................ #if SQLITE_STANDARD || USE_INTEROP_DLL || PLATFORM_COMPACTFRAMEWORK // // NOTE: Only compile in the native library pre-load code if the feature // has been enabled for this build. // #if PRELOAD_NATIVE_LIBRARY /// <summary> /// The name of the environment variable containing the processor /// architecture of the current process. /// </summary> private static readonly string PROCESSOR_ARCHITECTURE = "PROCESSOR_ARCHITECTURE"; ///////////////////////////////////////////////////////////////////////// private static readonly string DllFileExtension = ".dll"; ///////////////////////////////////////////////////////////////////////// private static readonly string XmlConfigurationFileName = typeof(UnsafeNativeMethods).Namespace + ".config"; ///////////////////////////////////////////////////////////////////////// /// <summary> /// This is the P/Invoke method that wraps the native Win32 LoadLibrary /// function. See the MSDN documentation for full details on what it /// does. /// </summary> ................................................................................ ///////////////////////////////////////////////////////////////////////// /// <summary> /// Attempts to initialize this class by pre-loading the native SQLite /// library for the processor architecture of the current process. /// </summary> internal static void Initialize() { // // NOTE: If the "No_PreLoadSQLite" environment variable is set (to // anything), skip all our special code and simply return. // if (GetVariableValue("No_PreLoadSQLite") != null) return; lock (staticSyncRoot) { // // TODO: Make sure this list is updated if the supported // processor architecture names and/or platform names // changes. ................................................................................ if (_SQLiteModule == IntPtr.Zero) _SQLiteModule = PreLoadSQLiteDll(null, null); } } ///////////////////////////////////////////////////////////////////////// /// <summary> /// /// </summary> /// <returns> /// /// </returns> private static string GetXmlConfigurationFileName() { string directory; string fileName; #if !PLATFORM_COMPACTFRAMEWORK directory = AppDomain.CurrentDomain.BaseDirectory; fileName = Path.Combine(directory, XmlConfigurationFileName); if (File.Exists(fileName)) return fileName; #endif directory = GetAssemblyDirectory(); fileName = Path.Combine(directory, XmlConfigurationFileName); if (File.Exists(fileName)) return fileName; return null; } ///////////////////////////////////////////////////////////////////////// /// <summary> /// Queries and returns the value of the specified "configuration" /// variable, using the XML configuration file and/or the environment /// variables for the current process and/or the current system, when /// available. /// </summary> /// <param name="name"> /// The name of the configuration variable. /// </param> /// <returns> /// The value of the configuration variable -OR- null if it cannot be /// determined. By default, references to existing environment will /// be expanded within the returned value unless either the "No_Expand" /// or "No_Expand_<paramref name="name" />" environment variables are /// set. /// </returns> internal static string GetVariableValue( string name ) { string value = null; if (name == null) return value; #if !PLATFORM_COMPACTFRAMEWORK bool expand = true; if (Environment.GetEnvironmentVariable("No_Expand") != null) { expand = false; } else if (Environment.GetEnvironmentVariable(String.Format( "No_Expand_{0}", name)) != null) { expand = false; } value = Environment.GetEnvironmentVariable(name); if (expand && !String.IsNullOrEmpty(value)) value = Environment.ExpandEnvironmentVariables(value); if (value != null) return value; #endif try { string fileName = GetXmlConfigurationFileName(); if (fileName == null) return value; XmlDocument document = new XmlDocument(); document.Load(fileName); XmlElement element = document.SelectSingleNode(String.Format( "/configuration/appSettings/add[@key='{0}']")) as XmlElement; if (element != null) { value = element.GetAttribute("value"); if (String.IsNullOrEmpty(value)) value = null; #if !PLATFORM_COMPACTFRAMEWORK else if (expand) value = Environment.ExpandEnvironmentVariables(value); #endif } } #if !NET_COMPACT_20 && TRACE_PRELOAD catch (Exception e) #else catch (Exception) #endif { #if !NET_COMPACT_20 && TRACE_PRELOAD try { Trace.WriteLine(String.Format( CultureInfo.CurrentCulture, "Native library pre-loader failed to get variable " + "\"{0}\" value: {1}", name, e)); /* throw */ } catch { // do nothing. } #endif } return value; } ///////////////////////////////////////////////////////////////////////// /// <summary> /// Queries and returns the directory for the assembly currently being /// executed. /// </summary> /// <returns> /// The directory for the assembly currently being executed -OR- null if /// it cannot be determined. /// </returns> private static string GetAssemblyDirectory() { try { Assembly assembly = Assembly.GetExecutingAssembly(); if (assembly == null) return null; string fileName; #if PLATFORM_COMPACTFRAMEWORK AssemblyName assemblyName = assembly.GetName(); if (assemblyName == null) return null; fileName = assemblyName.CodeBase; #else fileName = assembly.Location; #endif if (String.IsNullOrEmpty(fileName)) return null; string directory = Path.GetDirectoryName(fileName); if (String.IsNullOrEmpty(directory)) return null; return directory; } #if !NET_COMPACT_20 && TRACE_PRELOAD catch (Exception e) #else catch (Exception) #endif { #if !NET_COMPACT_20 && TRACE_PRELOAD try { Trace.WriteLine(String.Format( CultureInfo.CurrentCulture, "Native library pre-loader failed to get directory " + "for currently executing assembly: {0}", e)); /* throw */ } catch { // do nothing. } #endif } return null; } ///////////////////////////////////////////////////////////////////////// /// <summary> /// Queries and returns the base directory of the current application /// domain. /// </summary> /// <returns> /// The base directory for the current application domain -OR- null if it /// cannot be determined. /// </returns> private static string GetBaseDirectory() { // // NOTE: If the "PreLoadSQLite_BaseDirectory" environment variable // is set, use it verbatim for the base directory. // string directory = GetVariableValue("PreLoadSQLite_BaseDirectory"); if (directory != null) return directory; #if !PLATFORM_COMPACTFRAMEWORK // // NOTE: If the "PreLoadSQLite_UseAssemblyDirectory" environment // variable is set (to anything), attempt to use the directory // containing the currently executing assembly (i.e. // System.Data.SQLite) intsead of the application domain base // directory. // if (GetVariableValue("PreLoadSQLite_UseAssemblyDirectory") != null) { directory = GetAssemblyDirectory(); if (directory != null) return directory; } // // NOTE: Otherwise, fallback on using the base directory of the // current application domain. // return AppDomain.CurrentDomain.BaseDirectory; #else // // NOTE: Otherwise, fallback on using the directory containing // the currently executing assembly. // return GetAssemblyDirectory(); #endif } ///////////////////////////////////////////////////////////////////////// /// <summary> /// Determines if the dynamic link library file name requires a suffix /// and adds it if necessary. ................................................................................ /// </summary> /// <returns> /// The processor architecture of the current process -OR- null if it /// cannot be determined. /// </returns> private static string GetProcessorArchitecture() { // // NOTE: If the "PreLoadSQLite_ProcessorArchitecture" environment // variable is set, use it verbatim for the current processor // architecture. // string processorArchitecture = GetVariableValue( "PreLoadSQLite_ProcessorArchitecture"); if (processorArchitecture != null) return processorArchitecture; // // BUGBUG: Will this always be reliable? // processorArchitecture = GetVariableValue(PROCESSOR_ARCHITECTURE); ///////////////////////////////////////////////////////////////////// #if !PLATFORM_COMPACTFRAMEWORK // // HACK: Check for an "impossible" situation. If the pointer size // is 32-bits, the processor architecture cannot be "AMD64". // In that case, we are almost certainly hitting a bug in the // operating system and/or Visual Studio that causes the // PROCESSOR_ARCHITECTURE environment variable to contain the // wrong value in some circumstances. Please refer to ticket ................................................................................ // NOTE: We know that operating systems that return "AMD64" as // the processor architecture are actually a superset of // the "x86" processor architecture; therefore, return // "x86" when the pointer size is 32-bits. // processorArchitecture = "x86"; #if !NET_COMPACT_20 && TRACE_PRELOAD try { // // NOTE: Show that we hit a fairly unusual situation (i.e. the // "wrong" processor architecture was detected). // Trace.WriteLine(String.Format( CultureInfo.CurrentCulture, "Native library pre-loader detected {0}-bit pointer " + "size with processor architecture \"{1}\", using " + "processor architecture \"{2}\" instead...", IntPtr.Size * 8 /* bits */, savedProcessorArchitecture, processorArchitecture)); /* throw */ } catch { // do nothing. } #endif } #endif ///////////////////////////////////////////////////////////////////// #if PLATFORM_COMPACTFRAMEWORK // // NOTE: On the .NET Compact Framework, attempt to use the native // Win32 API function (via P/Invoke) that can provide us with // the processor architecture. // try { ................................................................................ // the structure. // GetSystemInfo(out systemInfo); // // NOTE: Return the processor architecture value as a string. // processorArchitecture = systemInfo.wProcessorArchitecture.ToString(); } catch { // do nothing. } // // NOTE: Upon failure, return an empty string. // processorArchitecture = String.Empty; #endif return processorArchitecture; } ///////////////////////////////////////////////////////////////////////// /// <summary> /// Given the processor architecture, returns the name of the platform. /// </summary> /// <param name="processorArchitecture"> ................................................................................ /// </returns> private static IntPtr PreLoadSQLiteDll( string directory, string processorArchitecture ) { // // NOTE: If the specified base directory is null, use the default // (i.e. attempt to automatically detect it). // if (directory == null) directory = GetBaseDirectory(); // // NOTE: If we failed to query the base directory, stop now. // ................................................................................ // NOTE: If the file does not exist, skip trying to load it. // if (!File.Exists(fileName)) return IntPtr.Zero; } try { #if !NET_COMPACT_20 && TRACE_PRELOAD try { // // NOTE: Show exactly where we are trying to load the native // SQLite library from. // Trace.WriteLine(String.Format( CultureInfo.CurrentCulture, "Native library pre-loader is trying to load native " + "SQLite library \"{0}\"...", fileName)); /* throw */ } catch { // do nothing. } #endif // // NOTE: Attempt to load the native library. This will either // return a valid native module handle, return IntPtr.Zero, // or throw an exception. // ................................................................................ { #if !NET_COMPACT_20 && TRACE_PRELOAD try { // // NOTE: First, grab the last Win32 error number. // int lastError = Marshal.GetLastWin32Error(); /* throw */ // // NOTE: Show where we failed to load the native SQLite // library from along with the Win32 error code and // exception information. // Trace.WriteLine(String.Format( CultureInfo.CurrentCulture, "Native library pre-loader failed to load native " + "SQLite library \"{0}\" (getLastError = {1}): {2}", fileName, lastError, e)); /* throw */ } catch { // do nothing. } #endif ................................................................................ SQLiteBase.CloseConnection(this, localHandle); #endif #if !NET_COMPACT_20 && TRACE_HANDLE try { Trace.WriteLine(String.Format( "CloseConnection: {0}", localHandle)); /* throw */ } catch { } #endif #else lock (syncRoot) ................................................................................ #endif { #if !NET_COMPACT_20 && TRACE_HANDLE try { Trace.WriteLine(String.Format( "CloseConnection: {0}, exception: {1}", handle, e)); /* throw */ } catch { } #endif } finally ................................................................................ if (localHandle != IntPtr.Zero) SQLiteBase.FinalizeStatement(cnn, localHandle); #if !NET_COMPACT_20 && TRACE_HANDLE try { Trace.WriteLine(String.Format( "FinalizeStatement: {0}", localHandle)); /* throw */ } catch { } #endif #else lock (syncRoot) ................................................................................ #endif { #if !NET_COMPACT_20 && TRACE_HANDLE try { Trace.WriteLine(String.Format( "FinalizeStatement: {0}, exception: {1}", handle, e)); /* throw */ } catch { } #endif } finally ................................................................................ if (localHandle != IntPtr.Zero) SQLiteBase.FinishBackup(cnn, localHandle); #if !NET_COMPACT_20 && TRACE_HANDLE try { Trace.WriteLine(String.Format( "FinishBackup: {0}", localHandle)); /* throw */ } catch { } #endif #else lock (syncRoot) ................................................................................ #endif { #if !NET_COMPACT_20 && TRACE_HANDLE try { Trace.WriteLine(String.Format( "FinishBackup: {0}, exception: {1}", handle, e)); /* throw */ } catch { } #endif } finally |