The Windows Threadpool (from Vista onwards) has quite a lot of features and is very usable, unfortunately prior to Vista it was much more limited and couldn't do tracking of job completion well. Using the threadpool involves a lot of functions calls, mainly for initialising static data (you create a structure and pass it to the function to init). The starting point is here: http://msdn.microsoft.com/en-us/library/ms682456.aspx (though you don't actually have to create a threadpool yourself because there is a default). When a job is submitted and the pool is busy it 'may' create a new thread, depending on a private algorithm. You use SetThreadpoolCallbackRunsLong to influence this. Bearing in mind that thread creation is expensive (potentially much more so than simply completing a callback) you don't want to use a naiive implementation that always creates new threads (unless you know your jobs are big, which a library can't know). Obviously, being as they are Windows functions they aren't C++ specific - the job function has a fixed signature taking a PVOID, for example. If you need to support Windows and pthreads I wouldn't use the windows threadpool, coming up with a suitable abstraction won't be simple - I'd go for something built on top of boost::threads. See here for a sample: http://msdn.microsoft.com/en-us/library/ms686980(VS.85).aspx HTH. Jim
-----Original Message----- From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of vicente.botet Sent: 09 May 2008 09:48 To: boost@lists.boost.org Subject: Re: [boost] [thread] cache of initialized threads
----- Original Message ----- From: "James Talbut" <James.Talbut@omg3d.com> To: <boost@lists.boost.org> Sent: Friday, May 09, 2008 9:39 AM Subject: Re: [boost] [thread] cache of initialized threads
With a thread cache either the threre is a cached_thread in the pool and we use it to launch the user function, either the chached_threader will crate a new one.
I suspect it's not going to help you much, but this is how the native thread pool behaves on Windows.
Hi Jim,
I don't know Windows at all. This is a good new, we will need only to implement it for posix threads.
Could you give me some pointers?
Thanks,
Vicente
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