DragonFly bugs List (threaded) for 2008-05
Re: Qt 4.4 QtConcurrent and libthread_xu
Aggelos Economopoulos wrote:
On Thursday 08 May 2008, Matthew Dillon wrote:
Ultimately it comes down to what does the standard intend?
So I am willing to commit the change, even if the standard doesn't allow
Well, SUSv3 says
"The pthread_mutex_lock(), pthread_mutex_trylock(), and pthread_mutex_unlock()
functions may fail if:
The value specified by mutex does not refer to an initialized mutex object."
So it definitely allows NULL and seems to encourage extra mtx->magic checks.
checking with linux (ubuntu hardy), passing a NULL pointer to
pthread_mutex_trylock() crashes, so I don't think we have to do the checks
as well. The root of the problem seems to be somewhere else.
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