Re: [Boost-users] [Thread] (Newb) shared memory in multithread process

Subject: Re: [Boost-users] [Thread] (Newb) shared memory in multithread process
From: gabe_rosser (gabriel.rosser_at_[hidden])
Date: 2009-07-10 07:17:20

Anthony Williams-4 wrote:
> 
> gabe_rosser <gabriel.rosser_at_[hidden]> writes:
> 
>> Now I have an error from main() (also shown in bold
>> above):
>>
>> main.cpp:123: error: variable ‘boost::thread t1’ has initialiser but
>> incomplete type
>> main.cpp:124: error: variable ‘boost::thread t2’ has initialiser but
>> incomplete type
>>
>> Sorry but I'm  not sure how to fix this.
> 
> There's a missing include:
> 
> #include <boost/thread/thread.hpp>
> 
> Anthony
> -- 
> Author of C++ Concurrency in Action | http://www.manning.com/williams
> just::thread C++0x thread library   | http://www.stdthread.co.uk
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> 

Perfect, sorry - I should have spotted that one (was too baffled by the code
to start with the simple things!).

The simple example above is around 10% slower when run multithreaded
compared with a single thread (optimized).  This is substantially better
than my previous attempts!  If reader_thread() were more complex then I
guess we would expect an increase in efficiency compared with a single
thread.

Thanks very much Anthony and Steven for your help.

Gabe
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