Geometry Boost List: Re: [geometry] volatile polygon

Subject: Re: [geometry] volatile polygon
From: Barend Gehrels (barend_at_[hidden])
Date: 2013-11-25 13:56:24

Adam Wulkiewicz wrote On 25-11-2013 13:13:
> Hi,
>
> Long Guo wrote:
>> Dear sir,
>>
>> I have two threads using the same polygon.
>> One thread is modifying the polygon.
>> And I want the other thread to use the modified polygon,
>> so I need to define the polygon as volatile.
>> However, when I use *(volatile polygon*)&mypolygon,
>> I get some error as follows:
>> error: no type named ‘type’ in ‘struct 
>> boost::geometry::dimension<volatile 
>> boost::geometry::model::polygon<boost::geometry::model::d2::point_xy<double> 
>> > >’.
>>
>> What's wrong with this usage?
>>
>
> boost::geometry::dimension (probably as well as some other functions) 
> isn't volatile-aware. Barend maybe we should use remove_volatile<> as 
> well?.

Sure, we've never handled this. We should probably add this, or add a 
convenience meta-function doing all the removals necessary, and use that 
(see also bare_type, which also removes a pointer, that is necessary for 
point-types, but not for point-types).

Regards, Barend