Hi All,
I am using boost 1.41.0 on Windows with Visual Studio 2008 and am seeing what seems to be an issue with signals2 and shared_ptr. The problem is that the shared_ptr does not decrement is reference count after I disconnect the signals2::connection. This is probably best illustrated with some code.
===== Test.h=====
#ifndef _CLASS1_H
#define _CLASS1_H
#include
#include
class Callee : public boost::enable_shared_from_this<Callee> {
public:
Callee() :
mInt(0)
{};
virtual ~Callee() {};
void func1() { mInt++; };
private:
int mInt;
};
class Caller {
public:
typedef boost::signals2::signal OnRun;
public:
Caller() :
mOnRun()
{};
~Caller() {};
void run(boost::shared_ptr<Callee> sp)
{
boost::signals2::connection conn = mOnRun.connect(boost::bind(&Callee::func1, sp));
_sleep(1000);
conn.disconnect();
};
private:
OnRun mOnRun;
};
#endif
===== End Test.h=====
======main.cpp======
int
main(int argc, char **argv)
{
Caller caller;
{
boost::shared_ptr<Callee> sp(new Callee);
caller.run(sp);
}
}
======End main.cpp======
Running this in the debugger I would expect to hit a breakpoint in the Callee class before the Caller class, this is not the case I destruct Caller before Callee. Having dug in a bit I see the use_count of the shared pointer go to 2 while in the caller.run which I would expect. The strange thing is the use_count does not decrement after the disconnect or exiting the caller.run function.
Is there a way to force the connection/signal to release that shared_ptr?
Thanks
Glenn
