32 lines
630 B
C++
32 lines
630 B
C++
// Copyright (C) 2001-2003
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// William E. Kempf
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/thread/thread.hpp>
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#include <boost/thread/once.hpp>
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#include <cassert>
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int value=0;
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boost::once_flag once = BOOST_ONCE_INIT;
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void init()
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{
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++value;
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}
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void thread_proc()
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{
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boost::call_once(&init, once);
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}
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int main(int argc, char* argv[])
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{
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boost::thread_group threads;
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for (int i=0; i<5; ++i)
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threads.create_thread(&thread_proc);
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threads.join_all();
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assert(value == 1);
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}
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