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Overview
| Comment: | Avoid unnecessary lock contention and managed heap allocations in the data type mapping subsystem. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
ca18c8f4ddc5d60bc2a77e460bad2564 |
| User & Date: | mistachkin 2017-11-07 01:00:47 |
Context
|
2017-11-07
| ||
| 01:42 | Fix incorrect memory allocation counts in the SQLiteSession class for SQLite memory obtained without using the SQLiteMemory class. Only debug builds with TRACK_MEMORY_BYTES defined were impacted. check-in: 395909320d user: mistachkin tags: trunk | |
| 01:00 | Avoid unnecessary lock contention and managed heap allocations in the data type mapping subsystem. check-in: ca18c8f4dd user: mistachkin tags: trunk | |
|
2017-11-02
| ||
| 02:37 | Final updates for release 1.0.106.0. check-in: 62313f295f user: mistachkin tags: trunk, release, release-1.0.106.0 | |
Changes
Changes to System.Data.SQLite/SQLiteConvert.cs.
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#if !NET_COMPACT_20 && TRACE_WARNING
DefaultTypeNameWarning(dbType, flags, defaultTypeName);
#endif
return defaultTypeName;
}
lock (_syncRoot)
{
if (_typeNames == null)
_typeNames = GetSQLiteDbTypeMap();
SQLiteDbTypeMapping value;
if (_typeNames.TryGetValue(dbType, out value))
return value.typeName;
}
if (defaultTypeName != null)
return defaultTypeName;
defaultTypeName = GetDefaultTypeName(connection);
................................................................................
#if !NET_COMPACT_20 && TRACE_WARNING
DefaultDbTypeWarning(typeName, flags, defaultDbType);
#endif
return (DbType)defaultDbType;
}
lock (_syncRoot)
{
if (_typeNames == null)
_typeNames = GetSQLiteDbTypeMap();
if (typeName != null)
{
SQLiteDbTypeMapping value;
if (_typeNames.TryGetValue(typeName, out value))
{
return value.dataType;
}
................................................................................
DefaultDbTypeWarning(typeName, flags, defaultDbType);
#endif
return (DbType)defaultDbType;
}
#endregion
private static object _syncRoot = new object();
private static SQLiteDbTypeMap _typeNames = null;
}
/// <summary>
/// SQLite has very limited types, and is inherently text-based. The first 5 types below represent the sum of all types SQLite
/// understands. The DateTime extension to the spec is for internal use only.
/// </summary>
public enum TypeAffinity
................................................................................
//
// NOTE: The only thing that we must guarantee here, according
// to the MSDN documentation for IEqualityComparer, is
// that for two given strings, if Equals return true then
// the two strings must hash to the same value.
//
if (value != null)
#if !PLATFORM_COMPACTFRAMEWORK
return value.ToLowerInvariant().GetHashCode();
#else
return value.ToLower().GetHashCode();
#endif
else
throw new ArgumentNullException("value");
}
#endregion
///////////////////////////////////////////////////////////////////////////
|
< < < < > | > > < < < < | < | | < < < < |
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#if !NET_COMPACT_20 && TRACE_WARNING
DefaultTypeNameWarning(dbType, flags, defaultTypeName);
#endif
return defaultTypeName;
}
{
SQLiteDbTypeMapping value;
if ((_typeNames != null) &&
_typeNames.TryGetValue(dbType, out value))
{
return value.typeName;
}
}
if (defaultTypeName != null)
return defaultTypeName;
defaultTypeName = GetDefaultTypeName(connection);
................................................................................
#if !NET_COMPACT_20 && TRACE_WARNING
DefaultDbTypeWarning(typeName, flags, defaultDbType);
#endif
return (DbType)defaultDbType;
}
{
if ((_typeNames != null) && (typeName != null))
{
SQLiteDbTypeMapping value;
if (_typeNames.TryGetValue(typeName, out value))
{
return value.dataType;
}
................................................................................
DefaultDbTypeWarning(typeName, flags, defaultDbType);
#endif
return (DbType)defaultDbType;
}
#endregion
private static readonly SQLiteDbTypeMap _typeNames = GetSQLiteDbTypeMap();
}
/// <summary>
/// SQLite has very limited types, and is inherently text-based. The first 5 types below represent the sum of all types SQLite
/// understands. The DateTime extension to the spec is for internal use only.
/// </summary>
public enum TypeAffinity
................................................................................
//
// NOTE: The only thing that we must guarantee here, according
// to the MSDN documentation for IEqualityComparer, is
// that for two given strings, if Equals return true then
// the two strings must hash to the same value.
//
if (value != null)
return StringComparer.OrdinalIgnoreCase.GetHashCode(value);
else
throw new ArgumentNullException("value");
}
#endregion
///////////////////////////////////////////////////////////////////////////
|