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RE: pthread_cond_timedwait accurate to one second only
- From: "Hannu E K Nevalainen \(garbage mail\)" <garbage_collector at telia dot com>
- To: <cygwin at cygwin dot com>
- Date: Mon, 25 Aug 2003 20:49:13 +0200
- Subject: RE: pthread_cond_timedwait accurate to one second only
> From: cygwin-owner@cygwin.com [mailto:cygwin-owner@cygwin.com]On Behalf
> Of peter garrone
> I would like to use this function down to 10 milliseconds
> accuracy if possible.
> However upon looking at winsup/cygwin/thread.cc,
> it uses the function "ftime" and the millisecond field is ignored.
>
> All the examples in the winsup testsuite also generally check to
> 5 seconds only.
>
> Is there any inherent reason why finer timing would not work?
In general; You're asking for RTOS granularity from a desktop OS.
Desktop OS'es in general allows that accuracy only in theoretical terms.
This might very well be the sole reason.
Expect even less accuracy from Cygwin; because it is a partly emulated
environment. NOTE: not saying to which degree here... I simply do not know.
/Hannu E K Nevalainen, B.Sc. EE Microcomputer systems - 59°16.37'N,
17°12.60'E
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