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Re: [Qemu-devel] [PATCH 1/6] Enable joinable POSIX threads

From: Kevin Wolf
Subject: Re: [Qemu-devel] [PATCH 1/6] Enable joinable POSIX threads
Date: Wed, 21 Sep 2011 15:40:28 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0.2) Gecko/20110906 Thunderbird/6.0.2

Am 21.09.2011 09:16, schrieb Paolo Bonzini:
> On 09/20/2011 06:53 PM, Jan Kiszka wrote:
>> -    qemu_thread_create(&thread_id, event_thread, card);
>> -    qemu_thread_create(&thread_id, handle_apdu_thread, card);
>> +    qemu_thread_create(&thread_id, event_thread, card, 
>> +    qemu_thread_create(&thread_id, handle_apdu_thread, card,
>> +                       QEMU_THREAD_DETACHED);
>>       return 0;
>>   }
> I think these two should be joinable.  Otherwise, you might be 
> destroying the apdu_thread_quit_mutex while the handle_apdu_thread 
> hasn't yet finished unlocking it (even though it already progressed 
> enough in qemu_mutex_destroy to release the main thread).
> Anyhow, the bug is not introduced by your patch, so
> Reviewed-by: Paolo Bonzini <address@hidden>

Actually, the man page says that joinable is the default, so this patch
does change the behaviour.


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