[Interest] QMap crashing in a thread

[BOUCARD Olivier]

The weird thing is that I have debug outputs in my Server destructor and they only appear at the end of the of the application as they should.
When I quit my application without sending a HTTP request.
And if I access my QMap in the destructor I have no problem.

 

Le Jeudi 13 mars 2014 22h40, Jason H <scorp1us at yahoo.com> a écrit :
 
I wouldn't think so. as they should have a very good idea of what this is, and that this exists.
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>I would think perhaps you are accessing a deleted object?
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>I've used QMap successfully in similar situations.
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>________________________________
> From: BOUCARD Olivier <boucard_olivier at yahoo.fr>
>To: "interest at qt-project.org" <interest at qt-project.org> 
>Sent: Thursday, March 13, 2014 4:21 PM
>Subject: Re: [Interest] QMap crashing in a thread
> 
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>
>Hum they do a static_cast before calling the callback:
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>void render_POST(const http_request& req, http_response** res)
>{
> 
 static_cast<CHILD*>(this)->render_POST(req, res);
>}
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>Maybe is the source of the problem.
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>Le Jeudi 13 mars 2014 22h16, BOUCARD Olivier <boucard_olivier at yahoo.fr> a écrit :
> 
>Thanks Thiago.
>>
>>I'm not sure to understand. QMap::contains is const.
>>So as QMap is re-entrant, in theory QMap::contains should be "thread-safe".
>>And I have no other thread accessing the map at this time.
>>I sent request manually with curl.
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>>Le Jeudi 13 mars 2014 22h07, Thiago Macieira <thiago.macieira at intel.com> a écrit :
>> 
>>Em qui 13 mar 2014, às 18:52:32, BOUCARD Olivier escreveu:
>>>> I have this Server class with a QMap<QString, MyClass*> object member.
>>>> This server is a HTTP server class using libhttpserver.
>>>> I have also a member function which is called by
 libhttpserver when it
>>>> receives a HTTP request. This function is called in a thread created by
>>>>
 libhttpserver automatically. And when I try call a  function on the QMap
>>>> inside this function I get a Segmentation Fault:
>>>
>>>You probably forgot to lock a mutex before accessing that QMap.
>>>-- 
>>>Thiago Macieira - thiago.macieira (AT) intel.com
>>>  Software Architect - Intel Open Source Technology Center
>>>
>>>
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