On Fri, Jun 19, 2015 at 7:10 PM, Patrick Walton <pwal...@mozilla.com> wrote:
> In theory you can use cmsg on POSIX systems to send channels over > channels, by treating channels as file descriptors. I tried this first, and > I believe it actually worked well on Linux. But on Mac I ran into all sorts > of (as far as I can tell) kernel bugs, including kernel panics and data > loss. It might still be possible by using Mach ports instead on the Mac > (and I started to sketch that code), but I eventually figured it was going > to be cleaner to just stop sending channels over channels across process > boundaries. > Firefox IPDL sends file descriptors over sockets on Mac using cmsg. There is a kernel bug where an in-flight file descriptor is not kept open by the kernel, so you must keep it open on the sender side until the message is acknowledged. I don't know about any kernel panics related to that feature. On Windows you should be able to rig something up using DuplicateHandle. I think Firefox uses this on Windows but I'm not sure. Rob -- oIo otoeololo oyooouo otohoaoto oaonoyooonoeo owohooo oioso oaonogoroyo owoiotoho oao oboroootohoeoro oooro osoiosotoeoro owoiololo oboeo osouobojoeocoto otooo ojouodogomoeonoto.o oAogoaoiono,o oaonoyooonoeo owohooo osoaoyoso otooo oao oboroootohoeoro oooro osoiosotoeoro,o o‘oRoaocoao,o’o oioso oaonosowoeoroaoboloeo otooo otohoeo ocooouoroto.o oAonodo oaonoyooonoeo owohooo osoaoyoso,o o‘oYooouo ofooooolo!o’o owoiololo oboeo oiono odoaonogoeoro ooofo otohoeo ofoioroeo ooofo ohoeololo. _______________________________________________ dev-servo mailing list dev-servo@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-servo
