An application using _beginthreadex crashes

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Hi All,

I am using the method _beginthreadex to create a thread in Visual Studio 2008 compiling with /MD option as suggested by MSDN.

Code :
ifdef _WINDOWS
_beginthreadex(NULL,0, &CMyClass::threadFunction, NULL, 0, NULL );
#endif

for running i am installing Visual Studio 2008 restributable package but my application crashes. if i am not using this method _beginthreadex, then my application runs correclty,

Please let me know what mistake am i doing,

Thanks,
Yash,

Posted 10-Jul-12 10:14am

Yashusid

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[no name] 10-Jul-12 16:21pm

It could be crashing because of something in CMyClass::threadFunction...

Yashusid 10-Jul-12 17:17pm

Hi Wes Aday,

You are absolutely correct,

i didn't think of this, and was always thinking that redistributable is not working correctly,

Thanks,
Yash

[no name] 11-Jul-12 8:08am

This question lacks sufficient information for an answer. It simply supplies a hypothesis:
"if i am not using this method _beginthreadex, then my application runs correclty"
What does this mean - if you don't use threading, if you use another type of threading - whatever?
Where do you start the thread, what's in the thread function etc?
What have you done to try to diagnose this bug - debugger?
Have you set a breakpoint in your thread function?

Sergey Alexandrovich Kryukov 11-Jul-12 14:18pm

Exactly.
--SA

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Blake Miller · Accepted Answer · 2012-07-10T10:27:00

Solution 1

CMyClass::threadFunction needs to be a static function of the class, since the _beginthreadex does not understand the hidden 'this' pointer.

I usually pass the pointer to the class as the argument to _beginthreadex so that inside the static function you can convert over to calling a member function via use of the pointer.

Search CodeProject for _beginthreadex and I am sure you will find some examples.

Posted 10-Jul-12 10:27am

Blake Miller

Comments

Sergey Alexandrovich Kryukov 10-Jul-12 16:56pm

It does not answer the question, because OP already uses a static thread method, but this is know reasonable practice which is good to understand, my 4.
--SA

[no name] 11-Jul-12 8:09am

Generous.