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proc
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self
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root
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proc
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thread-self
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root
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usr
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include
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mysql
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server
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private
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files >> //proc/self/root/proc/thread-self/root/usr/include/mysql/server/private/scope.h
/* Copyright (c) 2020, MariaDB This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ #pragma once #include <type_traits> #include <utility> namespace detail { template <typename Callable> class scope_exit { public: template <typename F> explicit scope_exit(F &&f) : function_(std::forward<F>(f)) { } scope_exit(scope_exit &&rhs) : function_(std::move(rhs.function_)), engaged_(rhs.engaged_) { rhs.release(); } scope_exit(const scope_exit &)= delete; scope_exit &operator=(scope_exit &&)= delete; scope_exit &operator=(const scope_exit &)= delete; void release() { engaged_= false; } ~scope_exit() { if (engaged_) function_(); } private: Callable function_; bool engaged_= true; }; } // end namespace detail template <typename Callable> detail::scope_exit<typename std::decay<Callable>::type> make_scope_exit(Callable &&f) { return detail::scope_exit<typename std::decay<Callable>::type>( std::forward<Callable>(f)); } #define CONCAT_IMPL(x, y) x##y #define CONCAT(x, y) CONCAT_IMPL(x, y) #define ANONYMOUS_VARIABLE CONCAT(_anonymous_variable, __LINE__) #define SCOPE_EXIT auto ANONYMOUS_VARIABLE= make_scope_exit
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