Re: [boost] [thread] basic mutex problem

Subject: Re: [boost] [thread] basic mutex problem
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2011-08-13 06:30:06

On 08/12/2011 07:59 PM, Greg Rubino wrote:

> struct random_activity_planner {
>
>    random_activity_planner(vector<activity>&  a, posix_time::ptime o)
>      : activities(a)
>      , origin(o) {}
>
>    void operator()() {
>
>      g_mutex.lock();
>      posix_time::ptime start(origin + posix_time::seconds(rand() % 1000));
>      posix_time::ptime end(start + posix_time::seconds(rand() % 1000));
>      activities.push_back(activity(start, end));
>      g_mutex.unlock();
>
>    }
>
>    vector<activity>&  activities;
>    const posix_time::ptime&  origin;
>
> };

You store a dangling reference to a temporary object in the 
random_activity_planner::origin. Thus the result of operator() is undefined.