Ejemplos de _SEH2_YIELD en C++ (Cpp)

Ejemplo n.º 1

Archivo: accelerator.c Proyecto: hackbunny/reactos

int
APIENTRY
NtUserTranslateAccelerator(
    HWND hWnd,
    HACCEL hAccel,
    LPMSG pUnsafeMessage)
{
    PWND Window = NULL;
    PACCELERATOR_TABLE Accel = NULL;
    ULONG i;
    MSG Message;
    USER_REFERENCE_ENTRY AccelRef, WindowRef;
    DECLARE_RETURN(int);

    TRACE("NtUserTranslateAccelerator(hWnd %p, hAccel %p, Message %p)\n",
          hWnd, hAccel, pUnsafeMessage);
    UserEnterShared();

    if (hWnd == NULL)
    {
        RETURN( 0);
    }

    _SEH2_TRY
    {
        ProbeForRead(pUnsafeMessage, sizeof(MSG), 4);
        RtlCopyMemory(&Message, pUnsafeMessage, sizeof(MSG));
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        SetLastNtError(_SEH2_GetExceptionCode());
        _SEH2_YIELD(RETURN( 0));
    }
    _SEH2_END;

    if ((Message.message != WM_KEYDOWN) &&
        (Message.message != WM_SYSKEYDOWN) &&
        (Message.message != WM_SYSCHAR) &&
        (Message.message != WM_CHAR))
    {
        RETURN( 0);
    }

    Accel = UserGetAccelObject(hAccel);
    if (!Accel)
    {
        RETURN( 0);
    }

    UserRefObjectCo(Accel, &AccelRef);

    Window = UserGetWindowObject(hWnd);
    if (!Window)
    {
        RETURN( 0);
    }

    UserRefObjectCo(Window, &WindowRef);

    /* FIXME: Associate AcceleratorTable with the current thread */

    for (i = 0; i < Accel->Count; i++)
    {
        if (co_IntTranslateAccelerator(Window, &Message, &Accel->Table[i]))
        {
            RETURN( 1);
        }

        /* Undocumented feature... */
        if (Accel->Table[i].fVirt & FVIRT_TBL_END)
            break;
    }

    RETURN( 0);

CLEANUP:
    if (Window) UserDerefObjectCo(Window);
    if (Accel) UserDerefObjectCo(Accel);

    TRACE("NtUserTranslateAccelerator returns %d\n", _ret_);
    UserLeave();
    END_CLEANUP;
}

Ejemplo n.º 2

Archivo: scrollbar.c Proyecto: GYGit/reactos

BOOL
APIENTRY
NtUserSBGetParms(
  HWND hWnd,
  int fnBar,
  PSBDATA pSBData,
  LPSCROLLINFO lpsi)
{
   PWND Window;
   SCROLLINFO psi;
   BOOL Ret;
   SBDATA SBDataSafe;
   DECLARE_RETURN(BOOL);
   USER_REFERENCE_ENTRY Ref;

   TRACE("Enter NtUserGetScrollInfo\n");
   UserEnterShared();

   _SEH2_TRY
   {
      RtlCopyMemory(&psi, lpsi, sizeof(SCROLLINFO));
      if (pSBData)
      {
         RtlCopyMemory(&SBDataSafe, pSBData, sizeof(SBDATA));
      }
   }
   _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
   {
      ERR("NtUserGetScrollInfo Failed size.\n");
      SetLastNtError(_SEH2_GetExceptionCode());
      _SEH2_YIELD(RETURN(FALSE));
   }
   _SEH2_END

   if(!(Window = UserGetWindowObject(hWnd)))
   {
      ERR("NtUserGetScrollInfo Bad window.\n");
      RETURN(FALSE);
   }

   UserRefObjectCo(Window, &Ref);
   Ret = co_IntGetScrollInfo(Window, fnBar, &SBDataSafe, &psi);
   UserDerefObjectCo(Window);

   _SEH2_TRY
   {
      RtlCopyMemory(lpsi, &psi, sizeof(SCROLLINFO));
   }
   _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
   {
      ERR("NtUserGetScrollInfo Failed copy to user.\n");
      SetLastNtError(_SEH2_GetExceptionCode());
      _SEH2_YIELD(RETURN(FALSE));
   }
   _SEH2_END

   RETURN( Ret);

CLEANUP:
   TRACE("Leave NtUserGetScrollInfo, ret=%i\n",_ret_);
   UserLeave();
   END_CLEANUP;
}