RE: How to convert the server time in xEvent to system time?
On Tue, 10 Aug 2004, Weidong Cui wrote: Does anybody know how X computes the time stamp for xEvents? The Source, Luke. Use the Source... xEvent.u.keyButtonPointer.time (aka 'server time'?), defined in X11/Xproto.h, indicates the number of milliseconds elapsed since the X server started. I want to convert it to an As far as I can tell that's not so. Instead, this value appears to be the elapsed time (in milliseconds) since the server system's Epoch, as defined by its gettimeofday(). Keep in mind, though, that the server system's Epoch is not necessarily exactly in sync with the client system's Epoch, even if they both sync to the same time server, unless of course they are both the same system. Also, given this is a 32-bit value, it rolls over every 49.71 days. FWIW, the X server does not keep track of when it was started. absolute time which then can be compared with times recorded by gettimeofday () in some other program. Unfortunately, after spending a lot of time, I still can't find out how to do it. If you happen to know how to do it, can you please tell me? Marc. +--+---+ | Marc Aurele La France | work: 1-780-492-9310 | | Computing and Network Services | fax:1-780-492-1729 | | 352 General Services Building | email: [EMAIL PROTECTED] | | University of Alberta +---+ | Edmonton, Alberta | | | T6G 2H1 | Standard disclaimers apply| | CANADA | | +--+---+ XFree86 developer and VP. ATI driver and X server internals. ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
Re: How to convert the server time in xEvent to system time?
Am 11.08.2004 00:31:59 schrieb(en) Weidong Cui: Hi, There, xEvent.u.keyButtonPointer.time (aka 'server time'?), defined in X11/Xproto.h, indicates the number of milliseconds elapsed since the X server started. I want to convert it to an absolute time which then can be compared with times recorded by gettimeofday () in some other program. Unfortunately, after spending a lot of time, I still can't find out how to do it. If you happen to know how to do it, can you please tell me? Thanks a lot! Weidong Cui ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel I don't know much about this, but I would suggest, that you use the time-function to get the time in seconds. You divide the number of milliseconds to get seconds and then subtract the values. You get the time of the start of the X-Server in seconds. Maybe you can use this idea Oliver Welter ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
RE: How to convert the server time in xEvent to system time?
Hi, Oliver, Thanks a lot for your reply. I tried this idea before. But the time of the start of the X server I got in this way was not accurate enough for my purpose. Does anybody know how X computes the time stamp for xEvents? Thanks, Weidong Cui I don't know much about this, but I would suggest, that you use the time-function to get the time in seconds. You divide the number of milliseconds to get seconds and then subtract the values. You get the time of the start of the X-Server in seconds. Maybe you can use this idea Oliver Welter -Original Message- From: Weidong Cui [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 10, 2004 3:32 PM To: [EMAIL PROTECTED] Subject: How to convert the server time in xEvent to system time? Hi, There, xEvent.u.keyButtonPointer.time (aka 'server time'?), defined in X11/Xproto.h, indicates the number of milliseconds elapsed since the X server started. I want to convert it to an absolute time which then can be compared with times recorded by gettimeofday () in some other program. Unfortunately, after spending a lot of time, I still can't find out how to do it. If you happen to know how to do it, can you please tell me? Thanks a lot! Weidong Cui ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
