Yes, it's copied and you're not logging construction in your copy constructor. It's working as designed.

-----Original Message----- From: Cory Nelson [mailto:phrosty@gmail.com] Sent: Wednesday, November 03, 2004 8:08 AM To: boost-users@lists.boost.org Subject: Re: [Boost-users] boost::thread maybe have bug.

I think boost makes a copy of the object (i'm sure someone else will confirm/shoot this down), though I'm not sure if it would cause that. try passing a boost::ref?

On Wed, 3 Nov 2004 23:28:56 +0800, 蹬三轮的 wrote:

...

Recently, I download boost 1.31.0 and compile it with Visual studio.net 2003. But the code below can't work properly:

class A { public: A() { printf("constructor.\n"); }

~A() { printf("destructor.\n"); }

void operator () () { } };

int main(int argc, char* argv[]) { A a; boost::thread t(a); t.join(); }

In my system, it generate the message like this: D:\thread\Debug>thread.exe constructor. destructor. destructor. destructor. destructor. destructor. destructor.

Who can tell me what's wrong with boost or something else?

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-- Cory Nelson http://www.int64.org

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