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71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
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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 <vector>
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#include <boost/bind.hpp>
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#include <boost/date_time/posix_time/posix_time.hpp>
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#include "boost/task.hpp"
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namespace pt = boost::posix_time;
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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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inline
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int fibonacci_fn( int n)
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{
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if ( n == 0) return 0;
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if ( n == 1) return 1;
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int k1( 1), k2( 0);
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for ( int i( 2); i <= n; ++i)
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{
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boost::this_thread::interruption_point();
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int tmp( k1);
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k1 = k1 + k2;
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k2 = tmp;
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}
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boost::this_thread::interruption_point();
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return k1;
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}
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inline
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void long_running_fn()
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{ boost::this_thread::sleep( pt::seconds( 1) ); }
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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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pool_type pool( tsk::poolsize( 5) );
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tsk::async(
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tsk::make_task( long_running_fn),
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pool);
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std::cout << "poolsize == " << pool.size() << std::endl;
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tsk::handle< int > h(
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tsk::async(
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tsk::make_task( fibonacci_fn, 10),
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pool) );
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h.interrupt();
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std::cout << h.get() << std::endl;
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return EXIT_SUCCESS;
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}
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catch ( tsk::task_interrupted const& )
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{ std::cerr << "task_interrupted: task was interrupted" << std::endl; }
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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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