/// <summary>
/// Dequeues a value from our thread-safe blocking queue. The caller becomes responsible
/// for the lifetime of the returned value. This method blocks until an element from the
/// queue becomes available (as in, we wait while it is empty).
/// </summary>
T pop()
{
lock_type lock(m_mutex);
m_condition.wait(lock, [this]{ return !m_queue.empty(); });
T returnedValue = std::move(m_queue.front()); //via http://stackoverflow.com/questions/2142965/c0x-move-from-container#comment2084416_2143009
m_queue.pop_front();
return returnedValue;
}
//[ some_helpers
point_type center_of_mass( const container_type &x , const mass_type &m )
{
double overall_mass = 0.0;
point_type mean( 0.0 );
for( size_t i=0 ; i<x.size() ; ++i )
{
overall_mass += m[i];
mean += m[i] * x[i];
}
if( !x.empty() ) mean /= overall_mass;
return mean;
}
static bool empty(const container_type& p) { return p.empty(); }
//Observe
bool empty() const { return values.empty(); }
bool empty() const { return list.empty(); }