Re: LuaJIT FFI callbacks (was Re: Calling lua functions from C when using luajit ffi.)

[steve donovan <steve.j.donovan@...>]

On Tue, Nov 15, 2011 at 1:27 AM, Mike Pall <mikelu-1111@mike.de> wrote:
> The first example is for Windows that lists all window titles, the

I'm seriously impressed!

But I did notice a problem with this example:

With my Windows 7 x64 machine (VS 2010 build) this script runs fine up
to a point, and then hangs. If I replace the
C.SendMessageA(hwnd,C.WM_GETTEXT,255,lbuf) with a
C.GetWindowTextA(hwnd,buf,255) then things complete normally.

I think from [1] that sending a message may actually block if the
window is unresponsive for some reason, and GetWindowText is designed
to handle this case.

So it probably isn't a LuaJIT issue at all!

steve d.

[1] http://msdn.microsoft.com/en-us/library/windows/desktop/ms633520(v=vs.85).aspx