Hi,

On Fri, 2013-03-15 at 15:18 +0100, Jean-Marc Choulet wrote:
> <%session>
> A a;
> </%session>
> 
> I think I must use Mutex in add function , but how ?

you don't need to, variables in the session scope are implicit protected
by a mutex, adding a mutex here, would be redundant. 



The semantic for cxxtools::Mutex however is the following. But be
warned, the mutex is not per session.

#include <cxxtools/mutex.h>
//...
{
  cxxtools::Mutex mutex
  std::verctor<int> shared_vec;
  {
     cxxtools::MutexLock lock(mutex); // lock mutex
     shared_vec.puth_back(1);
  } // release mutex lock
  ...
}


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