template<typename Duration>

bool timed_wait_and_pop(Data& popped_value,

Duration const& wait_duration)

{

boost::system_time const timeout=boost::get_system_time()+wait_duration;

boost::mutex::scoped_lock lock(the_mutex);

while(the_queue.empty())

{

if(!the_condition_variable.timed_wait(lock,timeout))

return false;

}

popped_value=the_queue.front();

the_queue.pop();

return true;

}

However, shouldn't this program instead start with

boost::mutex::scoped_lock lock(the_mutex, timeout);

if(!lock.owns())

return false;

i.e. shouldn't it also take care of getting stuck while locking the mutex.

i.e. if the timeout is 5 seconds & the getting the lock itself takes 10 seconds,

then, the earlier the program will return is 10+ seconds.