Calderon Hector wrote:
I think boost::thread will beneficiate from a third constructor:
thread::thread( boost::shared_ptr< boost::function0<void>& > )
1. This constructor will allow to use functors that are heavy to copy or simply non - copiable.
2. This contructor will also allow polymorphic functors. For example, in the following code, the copying of the functor destroys its polymorphism (there is not any 2 printed in the output) :
#include
#include <iostream> class A { public: unsigned int m_a;
A( unsigned int a_a ) : m_a( a_a ) {}
void Begin() {boost::thread ( * this );}
void operator ()() {foo(); std::cout << m_a;}
virtual void foo() {m_a = 3; std::cout << m_a;} };
Drop operator() and use boost::bind( &A::foo, shared_ptr<A>( new B ) ) as a thread proc.