updated to sqlite-3.5.1 now that it's stable

used new shared cache functionality (yay)

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%401651

extensions/sqlite/driver/SqDriver.cpp

@@ -67,11 +67,14 @@ SqDriver::SqDriver()
 {
 	m_Handle = BAD_HANDLE;
 	m_pOpenLock = NULL;
+	m_bThreadSafe = false;
 }
 
 void SqDriver::Initialize()
 {
 	m_pOpenLock = threader->MakeMutex();
+
+	InitializeThreadSafety();
 }
 
 void SqDriver::Shutdown()
@@ -80,6 +83,11 @@ void SqDriver::Shutdown()
 	{
 		m_pOpenLock->DestroyThis();
 	}
+
+	if (m_bThreadSafe)
+	{
+		sqlite3_enable_shared_cache(0);
+	}
 }
 
 bool SqDriver::IsThreadSafe()
@@ -89,10 +97,23 @@ bool SqDriver::IsThreadSafe()
 
 bool SqDriver::InitializeThreadSafety()
 {
-	/* sqlite should be thread safe if the locks are done right.
-	 * we don't enable the "shared cache" because it can corrupt
-	 * open databases!
-	 */
+	if (m_bThreadSafe)
+	{
+		return true;
+	}
+
+	if (sqlite3_threadsafe() == 0)
+	{
+		return false;
+	}
+
+	if (sqlite3_enable_shared_cache(1) != SQLITE_OK)
+	{
+		return false;
+	}
+
+	m_bThreadSafe = true;
+
 	return true;
 }
 

extensions/sqlite/driver/SqDriver.h

@@ -72,6 +72,7 @@ private:
 	Handle_t m_Handle;
 	IMutex *m_pOpenLock;
 	List<SqDbInfo> m_Cache;
+	bool m_bThreadSafe;
 };
 
 extern SqDriver g_SqDriver;