65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
/*
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Copyright (c) 2016, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_SCOPE_END_HPP_INCLUDED
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#define TORRENT_SCOPE_END_HPP_INCLUDED
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#include <utility>
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namespace libtorrent { namespace aux {
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template <typename Fun>
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struct scope_end_impl
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{
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explicit scope_end_impl(Fun f) : m_fun(std::move(f)) {}
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~scope_end_impl() { if (m_armed) m_fun(); }
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// movable
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scope_end_impl(scope_end_impl&&) = default;
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scope_end_impl& operator=(scope_end_impl&&) = default;
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// non-copyable
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scope_end_impl(scope_end_impl const&) = delete;
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scope_end_impl& operator=(scope_end_impl const&) = delete;
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void disarm() { m_armed = false; }
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private:
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Fun m_fun;
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bool m_armed = true;
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};
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template <typename Fun>
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scope_end_impl<Fun> scope_end(Fun f) { return scope_end_impl<Fun>(std::move(f)); }
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}}
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#endif
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