111 lines
2.3 KiB
C++
111 lines
2.3 KiB
C++
// Copyright (C) 2011 Tim Blechmann
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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#ifndef BOOST_LOCKFREE_TEST_HELPERS
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#define BOOST_LOCKFREE_TEST_HELPERS
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#include <set>
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#include <boost/array.hpp>
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#include <boost/lockfree/detail/atomic.hpp>
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#include <boost/thread.hpp>
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#include <boost/cstdint.hpp>
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template <typename int_type>
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int_type generate_id(void)
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{
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static boost::lockfree::detail::atomic<int_type> generator(0);
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return ++generator;
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}
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template <typename int_type, size_t buckets>
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class static_hashed_set
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{
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public:
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int calc_index(int_type id)
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{
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// knuth hash ... does not need to be good, but has to be portable
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size_t factor = size_t((float)buckets * 1.616f);
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return ((size_t)id * factor) % buckets;
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}
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bool insert(int_type const & id)
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{
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std::size_t index = calc_index(id);
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boost::lock_guard<boost::mutex> lock (ref_mutex[index]);
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std::pair<typename std::set<int_type>::iterator, bool> p;
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p = data[index].insert(id);
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return p.second;
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}
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bool find (int_type const & id)
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{
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std::size_t index = calc_index(id);
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boost::lock_guard<boost::mutex> lock (ref_mutex[index]);
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return data[index].find(id) != data[index].end();
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}
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bool erase(int_type const & id)
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{
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std::size_t index = calc_index(id);
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boost::lock_guard<boost::mutex> lock (ref_mutex[index]);
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if (data[index].find(id) != data[index].end()) {
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data[index].erase(id);
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assert(data[index].find(id) == data[index].end());
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return true;
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}
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else
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return false;
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}
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std::size_t count_nodes(void) const
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{
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std::size_t ret = 0;
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for (int i = 0; i != buckets; ++i) {
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boost::lock_guard<boost::mutex> lock (ref_mutex[i]);
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ret += data[i].size();
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}
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return ret;
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}
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private:
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boost::array<std::set<int_type>, buckets> data;
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mutable boost::array<boost::mutex, buckets> ref_mutex;
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};
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struct test_equal
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{
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test_equal(int i):
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i(i)
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{}
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void operator()(int arg) const
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{
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BOOST_REQUIRE_EQUAL(arg, i);
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}
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int i;
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};
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struct dummy_functor
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{
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void operator()(int /* arg */) const
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{
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}
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};
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#endif
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