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fix db locking errors

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This commit is contained in:
Luke Pulverenti
2016-12-11 00:12:00 -05:00
parent 0c2489059d
commit a9a808a9c4
12 changed files with 310 additions and 217 deletions
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116
Emby.Server.Implementations/Data/BaseSqliteRepository.cs
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@@ -20,14 +20,7 @@ namespace Emby.Server.Implementations.Data
{
Logger = logger;
WriteLock = AllowLockRecursion ?
new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion) :
new ReaderWriterLockSlim(LockRecursionPolicy.NoRecursion);
}
protected virtual bool AllowLockRecursion
{
get { return false; }
WriteLock = new ReaderWriterLockSlim(LockRecursionPolicy.NoRecursion);
}
protected TransactionMode TransactionMode
@@ -35,12 +28,26 @@ namespace Emby.Server.Implementations.Data
get { return TransactionMode.Immediate; }
}
protected TransactionMode ReadTransactionMode
{
get { return TransactionMode.Deferred; }
}
internal static int ThreadSafeMode { get; set; }
static BaseSqliteRepository()
{
SQLite3.EnableSharedCache = false;
int rc = raw.sqlite3_config(raw.SQLITE_CONFIG_MEMSTATUS, 0);
//CheckOk(rc);
rc = raw.sqlite3_config(raw.SQLITE_CONFIG_MULTITHREAD, 1);
//CheckOk(rc);
rc = raw.sqlite3_enable_shared_cache(1);
ThreadSafeMode = raw.sqlite3_threadsafe();
}
private static bool _versionLogged;
@@ -61,16 +68,19 @@ namespace Emby.Server.Implementations.Data
if (isReadOnly)
{
//Logger.Info("Opening read connection");
//connectionFlags = ConnectionFlags.ReadOnly;
connectionFlags = ConnectionFlags.Create;
connectionFlags |= ConnectionFlags.ReadWrite;
}
else
{
//Logger.Info("Opening write connection");
connectionFlags = ConnectionFlags.Create;
connectionFlags |= ConnectionFlags.ReadWrite;
}
connectionFlags = ConnectionFlags.Create;
connectionFlags |= ConnectionFlags.ReadWrite;
connectionFlags |= ConnectionFlags.SharedCached;
//connectionFlags |= ConnectionFlags.NoMutex;
//connectionFlags |= ConnectionFlags.SharedCached;
connectionFlags |= ConnectionFlags.NoMutex;
var db = SQLite3.Open(DbFilePath, connectionFlags, null);
@@ -114,7 +124,8 @@ namespace Emby.Server.Implementations.Data
db.ExecuteAll(string.Join(";", queries.ToArray()));
}
}
else*/ if (queries.Count > 0)
else*/
if (queries.Count > 0)
{
db.ExecuteAll(string.Join(";", queries.ToArray()));
}
@@ -122,6 +133,26 @@ namespace Emby.Server.Implementations.Data
return db;
}
public IStatement PrepareStatement(IDatabaseConnection connection, string sql)
{
return connection.PrepareStatement(sql);
}
public IStatement PrepareStatementSafe(IDatabaseConnection connection, string sql)
{
return connection.PrepareStatement(sql);
}
public List<IStatement> PrepareAll(IDatabaseConnection connection, string sql)
{
return connection.PrepareAll(sql).ToList();
}
public List<IStatement> PrepareAllSafe(IDatabaseConnection connection, string sql)
{
return connection.PrepareAll(sql).ToList();
}
protected void RunDefaultInitialization(IDatabaseConnection db)
{
var queries = new List<string>
@@ -288,12 +319,69 @@ namespace Emby.Server.Implementations.Data
}
}
public class DummyToken : IDisposable
{
public void Dispose()
{
}
}
public static IDisposable Read(this ReaderWriterLockSlim obj)
{
return new ReadLockToken(obj);
//if (BaseSqliteRepository.ThreadSafeMode > 0)
//{
// return new DummyToken();
//}
return new WriteLockToken(obj);
}
public static IDisposable Write(this ReaderWriterLockSlim obj)
{
//if (BaseSqliteRepository.ThreadSafeMode > 0)
//{
// return new DummyToken();
//}
return new WriteLockToken(obj);
}
}
public static class SemaphpreSlimExtensions
{
private sealed class WriteLockToken : IDisposable
{
private SemaphoreSlim _sync;
public WriteLockToken(SemaphoreSlim sync)
{
_sync = sync;
var task = sync.WaitAsync();
Task.WaitAll(task);
}
public void Dispose()
{
if (_sync != null)
{
_sync.Release();
_sync = null;
}
}
}
public class DummyToken : IDisposable
{
public void Dispose()
{
}
}
public static IDisposable Read(this SemaphoreSlim obj)
{
return Write(obj);
}
public static IDisposable Write(this SemaphoreSlim obj)
{
//if (BaseSqliteRepository.ThreadSafeMode > 0)
//{
// return new DummyToken();
//}
return new WriteLockToken(obj);
}
}