[Bug 5803] New: Multiple LL hooks generate never ending loop of events

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=5803

Summary: Multiple LL hooks generate never ending loop of events
           Product: Wine
           Version: CVS
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: source
          Severity: major
          Priority: P2
         Component: wine-user
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
OtherBugsDependingO 5712
             nThis:

If we have two LL hooks in the system from the separate threads we will generate
never ending loop of events.
Attached is the sample program that demostrates the problem.

Here is the loop that starts from internal message that we generated in usr/hook.c:
LRESULT WINAPI CallNextHookEx( HHOOK hhook, INT code, WPARAM wparam, LPARAM lparam )
{
...
        case WH_MOUSE_LL:
            MSG_SendInternalMessageTimeout( pid, tid, WM_WINE_MOUSE_LL_HOOK,
wparam, lparam,
                                            SMTO_ABORTIFHUNG,
get_ll_hook_timeout(), &ret );

And trying to process in user/message.c:
static LRESULT handle_internal_message( HWND hwnd, UINT msg, WPARAM wparam,
LPARAM lparam )
{
...
    case WM_WINE_MOUSE_LL_HOOK:
        return HOOK_CallHooks( WH_MOUSE_LL, HC_ACTION, wparam, lparam, TRUE );

Which re-starts the hook chain.