Re: [Boost-users] initialization of boost::thread::id object

Subject: Re: [Boost-users] initialization of boost::thread::id object
From: Anthony Williams (anthony.ajw_at_[hidden])
Date: 2010-06-09 03:25:09

Boost lzw <boostlzw_at_[hidden]> writes:

> Thanks a lot for the answer. In fact, I am trying to associate data
> (std::vector<int> and Widget objects) with a boost::mutex by wrapping its
> interface [ lock(), try_lock() and unlock() ] as follows:
> Â 
> class Widget { ... }; // data to be associated with
> Â 
> class MyData {
> public:
> Â Â  MyData(std::vector<int>& v) : v_(v), w_(new Widget) { }
>
> Â Â  ~MyData() {
> Â Â Â Â Â Â Â  m_.~mutex();

Do not call destructors manually. This will lead to undefined behaviour.

> Â Â Â Â Â  delete w_;
> Â }

> Â void unlock() {
> Â Â Â Â Â Â  id_ = 0;Â  // reset it, does not compile

id_ = boost::thread::id();

> Â Â Â Â Â Â  m_.unlock();
> Â  }

HTH,

Anthony
-- 
Author of C++ Concurrency in Action     http://www.stdthread.co.uk/book/
just::thread C++0x thread library             http://www.stdthread.co.uk
Just Software Solutions Ltd       http://www.justsoftwaresolutions.co.uk
15 Carrallack Mews, St Just, Cornwall, TR19 7UL, UK. Company No. 5478976