Alexandre Julliard : user32: Only wait for the desktop process when necessary.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: b4b817b907bb7ff3e1ab8769914676b1419fe3f3
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=b4b817b907bb7ff3e1ab8769914676b1419fe3f3

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Thu Jan 30 21:49:32 2014 +0100

user32: Only wait for the desktop process when necessary.

---

 dlls/user32/driver.c |    7 +++++++
 dlls/user32/win.c    |    3 ---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/dlls/user32/driver.c b/dlls/user32/driver.c
index 85e4116..672f194 100644
--- a/dlls/user32/driver.c
+++ b/dlls/user32/driver.c
@@ -57,8 +57,15 @@ static HMODULE load_desktop_driver( HWND hwnd )
     WCHAR key[(sizeof(key_pathW) + sizeof(displayW)) / sizeof(WCHAR) + 40];
     UINT guid_atom = HandleToULong( GetPropW( hwnd, display_device_guid_propW ));
 
+    USER_CheckNotLock();
+
     strcpy( driver_load_error, "The explorer process failed to start." );  /* default error */
 
+    if (!guid_atom)
+    {
+        SendMessageW( hwnd, WM_NULL, 0, 0 );  /* wait for the desktop process to be ready */
+        guid_atom = HandleToULong( GetPropW( hwnd, display_device_guid_propW ));
+    }
     memcpy( key, key_pathW, sizeof(key_pathW) );
     if (!GlobalGetAtomNameW( guid_atom, key + strlenW(key), 40 )) return 0;
     strcatW( key, displayW );
diff --git a/dlls/user32/win.c b/dlls/user32/win.c
index e29153a..275b93c 100644
--- a/dlls/user32/win.c
+++ b/dlls/user32/win.c
@@ -2086,9 +2086,6 @@ HWND WINAPI GetDesktopWindow(void)
         SERVER_END_REQ;
     }
 
-    /* wait for the desktop process to be ready */
-    SendMessageW( thread_info->top_window, WM_NULL, 0, 0 );
-
     if (!thread_info->top_window || !USER_Driver->pCreateDesktopWindow( thread_info->top_window ))
         ERR( "failed to create desktop window\n" );