Boost C++ Application Development Cookbook - Second Edition

How to do it...

It is time to make a thread local variable. Declare a function in a header file after the connection class definition:

connection& get_connection();

Make your source file look like this:

#include <boost/thread/tss.hpp>boost::thread_specific_ptr<connection> connection_ptr;connection& get_connection() {    connection* p = connection_ptr.get();    if (!p) {        connection_ptr.reset(new connection);        p = connection_ptr.get();        p->open();    }    return *p;}

Done. Using a thread-specific resource was never so easy:

void task() {    int result;    // Some computations go there.    // ...    // Sending the result:    get_connection().send_result(result);}