Am Samstag, 6. September 2008 06:40:03 schrieb vicente.botet:
----- Original Message ----- From: "Kowalke Oliver (QD IT PA SI)" <Oliver.Kowalke@qimonda.com> To: <boost@lists.boost.org> Sent: Friday, September 05, 2008 8:46 AM Subject: Re: [boost] [thread_pool] Dependencies between tasks
sequencing the access to the instance would be equivalent to chaining the tasks (== chained tasks are executed after each other -> as a sequence). take a look at thread_pool at the vault http://www.boostpro.com/vault/index.php?action=downloadfile&filename=boos t-threadpool.2.tar.gz&directory=Concurrent%20Programming&.
Do you mean that each time the user wants to sequence tasks she/he needs * chain the task to the stored one * store the last task
I don't know what you mean with sore a task. signature of chained_submit: template< typename Act, typename T > task< typename result_of< Act() >::type > chained_submit( Act const& act, task< T > & t); The function object act which should be passed to the thread pool is chained to the task t. This means - the function object act will be executed by I worker thread if the task t was finished. struct A { void f( std::string const& str) { printf("A::f(): %s\n", str.c_str() ); } }; struct B { void g() { printf("B::g()\n"); } }; A a; B b; tp::pool< tp::fixed, tp::unbounded_channel< tp::fifo > > pool( tp::max_poolsize( 5) ); tp::task< void > t1( pool.submit( boost::bind( & A::f, a, "abc", 2) ) ); tp::task< void > t2( pool.chained_submit( boost::bind( & A::f, a, "efg", 1), t1) ); tp::task< void > t3( pool.chained_submit( boost::bind( & A::f, a, "hij", 0), t2) ); pool.submit( boost::bind( & B::g, b) ); t3.get_future().wait();
I had already recovered your compressed file as other post let know. Please could you point me where the chaining task is described?
example_chained_submit and in the docu chapter 'Submiting Tasks'
Thanks, Vicente
Oliver