Date: Tue, 20 Apr 1999 11:45:08 +0200 From: Marc van Kempen <marc@bowtie.nl> To: Graham Wheeler <gram@cdsec.com> Cc: hackers@FreeBSD.ORG Subject: Re: Using select() to implement a delay Message-ID: <199904200945.LAA28715@bowtie.nl> In-Reply-To: gram's message of Tue, 20 Apr 1999 11:21:21 %2B0200. <199904200921.LAA09941@cdsec.com>
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> Hi all
>
> I have an interesting problem. I have a routine to implement delays:
>
> void Sleep(int secs, int usecs = 0)
> {
> struct timeval tv;
> tv.tv_sec = secs;
> tv.tv_usec = usecs;
> (void)select(0, 0, 0, 0, &tv);
> }
>
> I am using this both because it gives better resolution than sleep(),
> and also because it doesn't require the use of SIGALRM, which I am
> using elsewhere.
>
> On my development machine, Sleep(60) does exactly what is expected. On
> my clients machine, Sleep(60) returns immediately. Both are running
> FreeBSD 2.2.7. I don't have access to the clients machine, which is
> in another city, and has no development environment, so I can't run gdb,
> although it may not give away anything in any case.
>
> Does anyone have any ideas why the one works and the other doesn't?
>
Did you try catching the return value from select, it might be getting a
signal.
Marc.
----------------------------------------------------
Marc van Kempen BowTie Technology
Email: marc@bowtie.nl WWW & Databases
tel. +31 40 2 43 20 65
fax. +31 40 2 44 21 86 http://www.bowtie.nl
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