Date: Tue, 15 Mar 2005 13:19:25 -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.4.43.0503151312090.12075-100000@sea.ntplx.net> In-Reply-To: <200503150948.01624.ringworm01@gmail.com>
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On Tue, 15 Mar 2005, Michael C. Shultz wrote: > > Daniel, sorry to bother you again but I ran into something that is > either a bug or I am missing a vital piece of information somewhere. > Here is the situation: > > this works perfectly because I moved MGPMrUpgrade into > the same .c file so it would be a static function: > > structProperty* property; > pthread_t threads[NTHREADS]; > pthread_create( &threads[0], NULL, zzMGPMrUpgrade, property ); > > When I use MGPMrUpgrade from a shared library the function runs > yet property isn't being passed! > > I remember from assembly days that there were some stack tricks to be > done when making calls to a shared library in order to pass the > parameters, I forget what they are (been ages since I did assembly > programming) but anyways it seems like with gcc passing the args > through the stack to a function in a shared library isn't being handled > correctly. Am I missing something obvious? I don't know. You have to be sure that whatever property points to stays valid for the life of the thread (or at least as long as it is used). -- DE
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