Al 21/02/11 07:23, En/na Bo Berglund ha escrit: > The posted variation is apparently a Linux platform compatible version > that returns a millisecond value the same way as the Windows version > does, since there is no Windows GetTickCount API call in Linux.
The problem with the current implementation of GetTickCount under Linux is that's it's not monotonic: I use it to measure elapsed time (usually short spans, in the range from half a second to a few seconds), and, while under Windows it's guaranteed to work (I don't mind the wrap-around after 24 days, since the difference between two consecutive GetTickCount still gives a positive difference representing the elapsed time), under Linux if somebody adjusts the clock my timekeeping will fail (I have some checks in place to fail gracefully, but there are still some corner cases). Maybe a better way to implement a compatibility function would be to use clock_get_time with CLOCK_MONOTONIC, though I don't know if it's accessible from freepascal. http://linux.die.net/man/3/clock_gettime Bye -- Luca Olivetti Wetron Automatización S.A. http://www.wetron.es/ Tel. +34 93 5883004 (Ext.133) Fax +34 93 5883007 -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
