Subject:
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Re: thread class for legOS
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Mon, 21 Jan 2002 00:28:36 GMT
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Viewed:
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1940 times
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In lugnet.robotics.rcx.legos, Eric Swalens writes:
> > !! m_Pid = execi(&Thread::runWrapper, 0, (char**)NULL,
> > m_Prio, m_Stack);
>
> IRC, every method in C++ has an implicit parameter wich is the object itself;
> that's why you can't cast it. Try the following (does someone have a nicer
> solution?):
>
> Put runWrapper() outside the class:
>
> int runWrapper(int, char **th) {
> ((Thread*)th)->Run();
> return 0;
> }
>
> in Start():
>
> m_Pid = execi(runWrapper, 0, (char**)this, m_Prio, m_Stack);
Haven't done any C++ for a while, but IIRC you just need to declare runWrapper
as static, ie:
private:
static int runWrapper(...);
HTH
ROSCO
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Message has 2 Replies:
 | | Re: thread class for legOS
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| (...) No, static doesn't matter but it is possible the calling conventions of C and C++ might be different (I don't know of a platform where that is the case for a an extern function), so you might need to specify C linkage, as in: extern "C" int (...) (23 years ago, 21-Jan-02, to lugnet.robotics.rcx.legos)
| | | Re: thread class for legOS
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| (...) In fact, neither of these suggestions will work with the code as it stands, because the runWrapper() function tries to call the Run() function, which is a non-static member function. You could pass a pointer to the class instance (this) in the (...) (23 years ago, 21-Jan-02, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Re: thread class for legOS
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| (...) IRC, every method in C++ has an implicit parameter wich is the object itself; that's why you can't cast it. Try the following (does someone have a nicer solution?): Put runWrapper() outside the class: int runWrapper(int, char **th) { (...) (23 years ago, 18-Jan-02, to lugnet.robotics.rcx.legos)
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