Date: Mon, 5 Feb 2001 11:30:55 -0800 From: Alfred Perlstein <bright@wintelcom.net> To: "Paul D. Schmidt" <pds@uberhacker.org> Cc: hackers@FreeBSD.ORG Subject: Re: known pthread bug? Message-ID: <20010205113055.T26076@fw.wintelcom.net> In-Reply-To: <20010205111506.A73450@uberhacker.org>; from pds@uberhacker.org on Mon, Feb 05, 2001 at 11:15:06AM -0800 References: <20010204232301.C30977@uberhacker.org> <20010205005937.M26076@fw.wintelcom.net> <20010205111506.A73450@uberhacker.org>
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* Paul D. Schmidt <pds@uberhacker.org> [010205 11:15] wrote:
> On Mon, Feb 05, 2001 at 12:59:37AM -0800, Alfred Perlstein wrote:
> > * Paul D. Schmidt <pds@uberhacker.org> [010204 23:23] wrote:
>
> > > Are there currently any known bugs with pthread_mutex_init
> > > and pthread_cond_init returning 0, but pthread_cond_wait
> > > returning EINVAL nonetheless?
> >
> > Can you provide a code sample to replicate this and specify which
> > version of FreeBSD you're using?
>
> typedef struct cond_tag {
> long cond_id;
> char *name;
>
> pthread_mutex_t cond_mutex;
> pthread_cond_t sys_cond;
> } cond_t;
>
> void thread_cond_create(cond_t *cond)
> {
> pthread_cond_init(&cond->sys_cond, NULL);
> pthread_mutex_init(&cond->cond_mutex, NULL);
> }
>
> void thread_cond_wait(cond_t *cond)
> {
> pthread_cond_wait(&cond->sys_cond, &cond->cond_mutex);
> }
>
> pthread_cond_wait() is returning immediately with EINVAL, even though
> printf debugging tells me that both the pthread_(cond|mutex)_init
> functions returned 0 (which man tells me is success).
>
> This is on FreeBSD 4.2-RELEASE.
1) 4.2 RELEASE has known pthreads bugs, you should upgrade to -stable.
2) is cond->cond_mutex held when thread_cond_wait() is called? if not
I'm pretty sure it needs to be.
--
-Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
"I have the heart of a child; I keep it in a jar on my desk."
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