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Date: Mon, 17 Sep 2007 16:23:41 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: [ipc] semtimedop undeclared
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On Aug 28 14:47, Dave Korn wrote:
> On 28 August 2007 14:28, Mehdi Rabah wrote:
> 
> > Hi,
> > 
> > I'm trying to compile a linux project with cygwin. There is a file
> > which use IPC and include all the necessary files
> > 
> > #include <sys/types.h>
> > #include <sys/ipc.h>
> > #include <sys/shm.h>
> > #include <sys/sem.h>
> > #include <sys/time.h>
> > 
> > 
> > but still, I have this error at compile time:
> > 
> > error: `semtimedop' undeclared (first use this function)
> > 
> > what can I do about this ?
> 
>   Cygwin doesn't currently implement semtimedop, so your choices are 1) patch the
> cygwin source and implement it in the dll 2) change your linux project to not use
> it 3) implement it in your linux project as a wrapper around semop, possibly
> using a SIGALARM or other timer to trigger the timeout...

I'd opt for solution 2.  semtimedop is a Linux-only function.  It's not
in the POSIX standard, nor will it become part of the next upcoming POSIX
standard.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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