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same function name form different classes used in pthread

I try to implement multi-threading on Linux using C/C++ using pthread, but got a question:
how can I use the same function name from two different classes in the pthread's pthread_create?

more precisely:
I have two classes by using a template, so they are:
==============================================================
class buyerA {
order(item);
pay(total);
}

class buyerB {
order(item);
pay(total);
}
==============================================================
now I like use the pthread library, how can I create threads for these two buyers?
can I do (assume A is one instance of Class A, and B is another instance of ClassB):
==============================================================
pthread_create(pt1, NULL, A.order(), NULL, item1);
pthread_create(pt2, NULL, B.order(), NULL, item2);

....

pthread_create(pt1, NULL, A.pay(), NULL, total1);
pthread_create(pt2, NULL, B.pay(), NULL, total2);

.....
=================================================

Thanks for the help.

SOLUTION

sunnycoder

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ASKER CERTIFIED SOLUTION

itsmeandnobodyelse

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cw1592

ASKER

thanks for the comments; maybe I should use the Boost libray?can I do something like:

boost::thread* pThread = new boost::thread(
boost::bind(
&ClassA::ret_val, // member function
&theClassA) ); // instance of class

could you advice on which approach will be better (pthres or boost) in this situtaiton where a tmeplate is used to get more than one class, and threas are generated based on the member funcitons in classes (from the virtual funcitons from the tamplate)?

SOLUTION

itsmeandnobodyelse

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cw1592

ASKER

thanks to all, these comments help.