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- //
- // shared_ptr_alloc_test.cpp - use to evaluate the impact of count allocations
- //
- // Copyright (c) 2002, 2003 Peter Dimov
- //
- // Distributed under the Boost Software License, Version 1.0. (See
- // accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- //
- #include <boost/shared_ptr.hpp>
- #include <boost/config.hpp>
- #include <boost/detail/quick_allocator.hpp>
- #include <iostream>
- #include <vector>
- #include <ctime>
- #include <cstddef>
- #include <memory>
- int const n = 1024 * 1024;
- template<class T> void test(T * = 0)
- {
- std::clock_t t = std::clock();
- std::clock_t t2;
- {
- std::vector< boost::shared_ptr<T> > v;
- for(int i = 0; i < n; ++i)
- {
- boost::shared_ptr<T> pi(new T(i));
- v.push_back(pi);
- }
- t2 = std::clock();
- }
- std::clock_t t3 = std::clock();
- std::cout << " " << static_cast<double>(t3 - t) / CLOCKS_PER_SEC << " seconds, " << static_cast<double>(t2 - t) / CLOCKS_PER_SEC << " + " << static_cast<double>(t3 - t2) / CLOCKS_PER_SEC << ".\n";
- }
- class X
- {
- public:
- explicit X(int n): n_(n)
- {
- }
- void * operator new(std::size_t)
- {
- return std::allocator<X>().allocate(1, static_cast<X*>(0));
- }
- void operator delete(void * p)
- {
- std::allocator<X>().deallocate(static_cast<X*>(p), 1);
- }
- private:
- X(X const &);
- X & operator=(X const &);
- int n_;
- };
- class Y
- {
- public:
- explicit Y(int n): n_(n)
- {
- }
- void * operator new(std::size_t n)
- {
- return boost::detail::quick_allocator<Y>::alloc(n);
- }
- void operator delete(void * p, std::size_t n)
- {
- boost::detail::quick_allocator<Y>::dealloc(p, n);
- }
- private:
- Y(Y const &);
- Y & operator=(Y const &);
- int n_;
- };
- class Z: public Y
- {
- public:
- explicit Z(int n): Y(n), m_(n + 1)
- {
- }
- private:
- Z(Z const &);
- Z & operator=(Z const &);
- int m_;
- };
- int main()
- {
- std::cout << BOOST_COMPILER "\n";
- std::cout << BOOST_PLATFORM "\n";
- std::cout << BOOST_STDLIB "\n";
- #if defined(BOOST_HAS_THREADS)
- std::cout << "BOOST_HAS_THREADS: (defined)\n";
- #else
- std::cout << "BOOST_HAS_THREADS: (not defined)\n";
- #endif
- #if defined(BOOST_SP_USE_STD_ALLOCATOR)
- std::cout << "BOOST_SP_USE_STD_ALLOCATOR: (defined)\n";
- #else
- std::cout << "BOOST_SP_USE_STD_ALLOCATOR: (not defined)\n";
- #endif
- #if defined(BOOST_SP_USE_QUICK_ALLOCATOR)
- std::cout << "BOOST_SP_USE_QUICK_ALLOCATOR: (defined)\n";
- #else
- std::cout << "BOOST_SP_USE_QUICK_ALLOCATOR: (not defined)\n";
- #endif
- #if defined(BOOST_QA_PAGE_SIZE)
- std::cout << "BOOST_QA_PAGE_SIZE: " << BOOST_QA_PAGE_SIZE << "\n";
- #else
- std::cout << "BOOST_QA_PAGE_SIZE: (not defined)\n";
- #endif
- std::cout << n << " shared_ptr<int> allocations + deallocations:\n";
- test<int>();
- test<int>();
- test<int>();
- std::cout << n << " shared_ptr<X> allocations + deallocations:\n";
- test<X>();
- test<X>();
- test<X>();
- std::cout << n << " shared_ptr<Y> allocations + deallocations:\n";
- test<Y>();
- test<Y>();
- test<Y>();
- std::cout << n << " shared_ptr<Z> allocations + deallocations:\n";
- test<Z>();
- test<Z>();
- test<Z>();
- }
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