Replace all uses of AMTL threads with STL threads.

This also rewrites the work loop for threaded queries. It has been
simplified significantly.

extensions/sqlite/driver/SqDatabase.cpp

@@ -64,17 +64,13 @@ const char *SqDatabase::GetError(int *errorCode/* =NULL */)
 
 bool SqDatabase::LockForFullAtomicOperation()
 {
-	if (!m_FullLock)
-		m_FullLock = new ke::Mutex();
-
-	m_FullLock->Lock();
+	m_FullLock.lock();
 	return true;
 }
 
 void SqDatabase::UnlockFromFullAtomicOperation()
 {
-	if (m_FullLock)
-		m_FullLock->Unlock();
+	m_FullLock.unlock();
 }
 
 IDBDriver *SqDatabase::GetDriver()

extensions/sqlite/driver/SqDatabase.h

@@ -33,7 +33,7 @@
 #define _INCLUDE_SQLITE_SOURCEMOD_DATABASE_H_
 
 #include <am-refcounting-threadsafe.h>
-#include <am-thread-utils.h>
+#include <mutex>
 #include "SqDriver.h"
 
 class SqDatabase
@@ -70,7 +70,7 @@ public:
 	}
 private:
 	sqlite3 *m_sq3;
-	ke::AutoPtr<ke::Mutex> m_FullLock;
+	std::mutex m_FullLock;
 	bool m_Persistent;
 	String m_LastError;
 	int m_LastErrorCode;

extensions/sqlite/driver/SqDriver.cpp

@@ -75,7 +75,7 @@ SqDriver::SqDriver()
 // of g_SqDriver in SqDatabase's destructor.
 SqDriver::~SqDriver()
 {
-	ke::AutoLock lock(&m_OpenLock);
+	std::lock_guard<std::mutex> lock(m_OpenLock);
 
 	List<SqDbInfo>::iterator iter;
 	SqDatabase *sqdb;
@@ -178,7 +178,7 @@ inline bool IsPathSepChar(char c)
 
 IDatabase *SqDriver::Connect(const DatabaseInfo *info, bool persistent, char *error, size_t maxlength)
 {
-	ke::AutoLock lock(&m_OpenLock);
+	std::lock_guard<std::mutex> lock(m_OpenLock);
 	
 	/* Full path to the database file */
 	char fullpath[PLATFORM_MAX_PATH];
@@ -296,7 +296,7 @@ IDatabase *SqDriver::Connect(const DatabaseInfo *info, bool persistent, char *er
 
 void SqDriver::RemovePersistent(IDatabase *pdb)
 {
-	ke::AutoLock lock(&m_OpenLock);
+	std::lock_guard<std::mutex> lock(m_OpenLock);
 
 	List<SqDbInfo>::iterator iter;
 	for (iter = m_Cache.begin(); iter != m_Cache.end(); iter++)

extensions/sqlite/driver/SqDriver.h

@@ -36,7 +36,7 @@
 #include <IDBDriver.h>
 #include <sh_list.h>
 #include <sh_string.h>
-#include <am-thread-utils.h>
+#include <mutex>
 #include "sqlite-source/sqlite3.h"
 
 using namespace SourceMod;
@@ -72,7 +72,7 @@ public:
 	void RemovePersistent(IDatabase *pdb);
 private:
 	Handle_t m_Handle;
-	ke::Mutex m_OpenLock;
+	std::mutex m_OpenLock;
 	List<SqDbInfo> m_Cache;
 	bool m_bThreadSafe;
 	bool m_bShutdown;