Re: [Boost-users] [asio] What happens when a deadline_timer is deleted

Subject: Re: [Boost-users] [asio] What happens when a deadline_timer is deleted
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-09-01 10:50:03

AMDG

Bjarne Laursen wrote:
> If I have a deadline_timer in my class and my class is deleted, the 
> compleetion function will be called (with error code). But as the 
> destructor have already been run I guess that the 'this' pointer will 
> be invalid!

Correct.

> Is this safe?

No.

> What if my compleetion function is virtual?

It doesn't matter.

> timer.async_wait(boost::bind(&MyClass::OnTimer, this, 
> boost::asio::placeholders::error));

The safest way to handle it is to use shared_ptr and 
enable_shared_from_this.

In Christ,
Steven Watanabe