winex11: Use TEB to store driver thread data.

dlls/winex11.drv/event.c

@@ -478,8 +478,8 @@ static BOOL process_events( Display *display, Bool (*filter)(Display*, XEvent*,X
 DWORD X11DRV_MsgWaitForMultipleObjectsEx( DWORD count, const HANDLE *handles,
                                           DWORD timeout, DWORD mask, DWORD flags )
 {
+    struct x11drv_thread_data *data = x11drv_thread_data();
     DWORD ret;
-    struct x11drv_thread_data *data = TlsGetValue( thread_data_tls_index );
 
     if (!data)
     {

dlls/winex11.drv/x11drv.h

@@ -395,14 +395,10 @@ struct x11drv_thread_data
 };
 
 extern struct x11drv_thread_data *x11drv_init_thread_data(void) DECLSPEC_HIDDEN;
-extern DWORD thread_data_tls_index DECLSPEC_HIDDEN;
 
 static inline struct x11drv_thread_data *x11drv_thread_data(void)
 {
-    DWORD err = GetLastError();  /* TlsGetValue always resets last error */
-    struct x11drv_thread_data *data = TlsGetValue( thread_data_tls_index );
-    SetLastError( err );
-    return data;
+    return NtUserGetThreadInfo()->driver_data;
 }
 
 /* retrieve the thread display, or NULL if not created yet */

dlls/winex11.drv/x11drv_main.c

@@ -81,7 +81,6 @@ BOOL client_side_with_render = TRUE;
 BOOL shape_layered_windows = TRUE;
 int copy_default_colors = 128;
 int alloc_system_colors = 256;
-DWORD thread_data_tls_index = TLS_OUT_OF_INDEXES;
 int xrender_error_base = 0;
 HMODULE x11drv_module = 0;
 char *process_name = NULL;
@@ -650,8 +649,6 @@ static BOOL process_attach(void)
 
     setup_options();
 
-    if ((thread_data_tls_index = TlsAlloc()) == TLS_OUT_OF_INDEXES) return FALSE;
-
     /* Open display */
 
     if (!XInitThreads()) ERR( "XInitThreads failed, trouble ahead\n" );
@@ -702,7 +699,7 @@ static BOOL process_attach(void)
  */
 void X11DRV_ThreadDetach(void)
 {
-    struct x11drv_thread_data *data = TlsGetValue( thread_data_tls_index );
+    struct x11drv_thread_data *data = x11drv_thread_data();
 
     if (data)
     {
@@ -712,7 +709,7 @@ void X11DRV_ThreadDetach(void)
         XCloseDisplay( data->display );
         HeapFree( GetProcessHeap(), 0, data );
         /* clear data in case we get re-entered from user32 before the thread is truly dead */
-        TlsSetValue( thread_data_tls_index, NULL );
+        NtUserGetThreadInfo()->driver_data = NULL;
     }
 }
 
@@ -773,7 +770,7 @@ struct x11drv_thread_data *x11drv_init_thread_data(void)
     if (TRACE_ON(synchronous)) XSynchronize( data->display, True );
 
     set_queue_display_fd( data->display );
-    TlsSetValue( thread_data_tls_index, data );
+    NtUserGetThreadInfo()->driver_data = data;
 
     if (use_xim) X11DRV_SetupXIM();
 

include/ntuser.h

@@ -45,6 +45,7 @@ enum
 /* TEB thread info, not compatible with Windows */
 struct ntuser_thread_info
 {
+    void      *driver_data;       /* driver-specific data */
     DWORD      message_time;      /* value for GetMessageTime */
     DWORD      message_pos;       /* value for GetMessagePos */
     ULONG_PTR  message_extra;     /* value for GetMessageExtraInfo */