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88 lines
1.8 KiB
C++
Executable File
88 lines
1.8 KiB
C++
Executable File
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// Copyright Oliver Kowalke 2009.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <iostream>
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#include <cstdlib>
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#include <stdexcept>
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#include <boost/assert.hpp>
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#include <boost/bind.hpp>
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#include <boost/ref.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/utility.hpp>
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#include "boost/task.hpp"
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namespace tsk = boost::tasks;
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typedef tsk::static_pool< tsk::unbounded_fifo > pool_type;
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void sub_task( int i, int n, tsk::spin::count_down_event & ev)
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{
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BOOST_ASSERT( boost::this_task::runs_in_pool() );
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fprintf( stderr, "t%d running ...\n", i);
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ev.set();
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fprintf( stderr, "t%d finished ...\n", i);
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}
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void main_task(
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pool_type & pool,
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int n,
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tsk::spin::count_down_event & outer_ev)
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{
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BOOST_ASSERT( boost::this_task::runs_in_pool() );
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fprintf( stderr, "main-task running %d sub-tasks\n", n);
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tsk::spin::count_down_event inner_ev( n);
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for ( int i = 0; i < n; ++i)
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tsk::async(
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tsk::make_task(
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& sub_task,
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i,
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n,
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boost::ref( inner_ev) ),
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tsk::as_sub_task() );
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inner_ev.wait();
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outer_ev.set();
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}
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int main( int argc, char *argv[])
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{
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try
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{
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tsk::poolsize psize( boost::thread::hardware_concurrency() );
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pool_type pool( psize);
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int n = 32;
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tsk::spin::count_down_event ev( 1);
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tsk::async(
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tsk::make_task(
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& main_task,
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boost::ref( pool),
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n,
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boost::ref( ev) ),
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pool);
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fprintf( stderr, "main thread: waiting for t0 to finish\n");
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ev.wait();
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fprintf( stderr, "main thread: t0 finished\n");
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return EXIT_SUCCESS;
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}
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catch ( std::exception const& e)
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{ std::cerr << "exception: " << e.what() << std::endl; }
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catch ( ... )
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{ std::cerr << "unhandled" << std::endl; }
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return EXIT_FAILURE;
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}
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