MESSAGE
| DATE | 2016-12-21 |
| FROM | Ruben Safir
|
| SUBJECT | Subject: [Learn] (fwd) Re: Threads and Object Methods
|
From learn-bounces-at-nylxs.com Wed Dec 21 17:21:10 2016
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From: Ruben Safir
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Date: Wed, 21 Dec 2016 17:20:23 -0500 (EST)
Subject: [Learn] (fwd) Re: Threads and Object Methods
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From: ruben safir
Newsgroups: comp.lang.c++
Subject: Re: Threads and Object Methods
Date: Sun, 18 Dec 2016 09:36:24 -0500
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Xref: panix comp.lang.c++:1126112
On 12/18/2016 06:09 AM, ?? Tiib wrote:
> On Sunday, 18 December 2016 11:49:07 UTC+2, ruben safir wrote:
>> Why can't the threads library handle object methods that are not static
>> to the class
>>
>>
>> such as std::thread paint(read_chunk);
>> paint.detach();
>>
>>
>> where read_chunk is an method of an object of class Images.
>
> Again some voodoo trying-out nonsense that we can't even
> copy-paste and run? :-/ The 'std::thread' *can* use non-static
> methods. However the caller has to supply arguments (starting
> from 'this') to it.
>
> #include
> #include
>
> struct Reader
> {
> void read_chunk()
> {
> std::cout << "quod erat demonstrandum" << std::endl;
> }
> };
>
> int main()
> {
> std::thread paint(&Reader::read_chunk, Reader());
> paint.join();
> }
>
> See? It is easy peasy.
>
if you call it like that it loses its context of the object that
instantated it which, especially in this case, it needs in order to do
its job.
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