forked from premiere/premiere-libtorrent
89 lines
1.8 KiB
C++
89 lines
1.8 KiB
C++
// Copyright Daniel Wallin 2004. Use, modification and distribution is
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// subject to 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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#ifndef TORRENT_INVARIANT_ACCESS_HPP_INCLUDED
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#define TORRENT_INVARIANT_ACCESS_HPP_INCLUDED
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#include "libtorrent/config.hpp"
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#include "libtorrent/assert.hpp"
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#include <cstdio>
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#if TORRENT_USE_INVARIANT_CHECKS
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namespace libtorrent {
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class invariant_access
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{
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public:
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template<class T>
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static void check_invariant(T const& self)
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{
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self.check_invariant();
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}
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};
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template<class T>
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void check_invariant(T const& x)
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{
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#ifndef BOOST_NO_EXCEPTIONS
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try
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{
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invariant_access::check_invariant(x);
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}
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catch (std::exception const& err)
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{
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std::fprintf(stderr, "invariant_check failed with exception: %s\n"
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, err.what());
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}
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catch (...)
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{
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std::fprintf(stderr, "invariant_check failed with exception\n");
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}
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#else
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invariant_access::check_invariant(x);
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#endif
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}
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struct invariant_checker {};
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template<class T>
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struct invariant_checker_impl : invariant_checker
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{
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explicit invariant_checker_impl(T const& self_)
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: self(self_)
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{
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check_invariant(self);
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}
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invariant_checker_impl(invariant_checker_impl const& rhs)
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: self(rhs.self) {}
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~invariant_checker_impl()
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{
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check_invariant(self);
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}
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T const& self;
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private:
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invariant_checker_impl& operator=(invariant_checker_impl const&);
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};
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template<class T>
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invariant_checker_impl<T> make_invariant_checker(T const& x)
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{
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return invariant_checker_impl<T>(x);
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}
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}
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#define INVARIANT_CHECK \
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invariant_checker const& _invariant_check = make_invariant_checker(*this); \
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(void)_invariant_check
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#else
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#define INVARIANT_CHECK do {} TORRENT_WHILE_0
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#endif
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#endif // TORRENT_INVARIANT_ACCESS_HPP_INCLUDED
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