Lazy initialisation of thread locale.

scheduler/thread.c

@@ -90,7 +90,6 @@ static BOOL THREAD_InitTEB( TEB *teb )
     teb->StaticUnicodeString.MaximumLength = sizeof(teb->StaticUnicodeBuffer);
     teb->StaticUnicodeString.Buffer = (PWSTR)teb->StaticUnicodeBuffer;
     teb->teb_sel = SELECTOR_AllocBlock( teb, 0x1000, SEGMENT_DATA, TRUE, FALSE );
-    teb->CurrentLocale = GetUserDefaultLCID(); /* for threads in user context */
     return (teb->teb_sel != 0);
 }
 
@@ -272,10 +271,6 @@ static void THREAD_Start(void)
 
 /***********************************************************************
  *           CreateThread   (KERNEL32.63)
- *
- * NOTE
- *  this function is not called for the first thread of a process
- *  do initializations in THREAD_InitTEB
  */
 HANDLE WINAPI CreateThread( SECURITY_ATTRIBUTES *sa, DWORD stack,
                             LPTHREAD_START_ROUTINE start, LPVOID param,
@@ -858,7 +853,9 @@ VOID WINAPI VWin32_BoostThreadStatic( DWORD threadId, INT boost )
  */
 LCID WINAPI GetThreadLocale(void)
 {
-    return NtCurrentTeb()->CurrentLocale;
+    LCID ret = NtCurrentTeb()->CurrentLocale;
+    if (!ret) NtCurrentTeb()->CurrentLocale = ret = GetUserDefaultLCID();
+    return ret;
 }