Date: Mon, 14 Mar 2005 23:57:29 -0500 (EST) From: Daniel Eischen <deischen@freebsd.org> To: "Michael C. Shultz" <ringworm01@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: threads question Message-ID: <Pine.GSO.4.43.0503142350110.9058-100000@sea.ntplx.net> In-Reply-To: <200503142014.28897.ringworm01@gmail.com>
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On Mon, 14 Mar 2005, Michael C. Shultz wrote:
> Hi, I've just reached a point in a program I'm writing where I'd like to
> do threading.
>
> When I try to start a thread like this:
>
> pthread_create(&thread, &attr, MGPMrUpgrade, property );
^^^^^^^^ &property
You should compile with -Wall and get rid of any warnings.
> where property is a structure of many variables it doesn't get passed
> to the function. If I do this:
>
> pthread_create(&thread, &attr, MGPMrUpgrade( &property ), NULL );
That looks like it will actuall call MGPMrUpgrade() and use its
return value as the function pointer.
> It works, but just seems wrong.
>
> Can anyone point me to a source file, preferably in /usr/src somewhere
> that passes a structure to a function being run as a thread so I may
> study the proper way to do this?
src/lib/libpthread/test/sem_d.c
src/lib/libpthread/test/mutex_d.c
src/lib/libpthread/test/sigwait_d.c
I'd suggest getting Butenhof's "Programming with POSIX Threads" book.
--
DE
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