mirror of
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71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/* EQEMu: Everquest Server Emulator
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Copyright (C) EQEMu Development Team (http://eqemulator.net)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY except by those people which sell it, which
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are required to give you total support for your newly bought product;
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without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 04111-1307 USA
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*/
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#pragma once
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#include "shared_memory_error.h"
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#include "../expected.h"
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#include <boost/interprocess/managed_mapped_file.hpp>
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#include <boost/interprocess/allocators/allocator.hpp>
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#include <type_traits>
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namespace eq
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{
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namespace shared
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{
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namespace detail
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{
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template<typename Ty>
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struct type_factory {
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static_assert(std::is_trivially_constructible<Ty>::value,
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"Non-specialized types must be trivially constructible, consider creating a type_factory in eq::shared::detail if you want to use this type.");
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Ty* create(const std::string& key, boost::interprocess::managed_mapped_file* mmf) {
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return mmf->find_or_construct<Ty>(key.c_str())();
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}
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};
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}
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template<typename Ty>
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class handle {
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public:
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handle() = default;
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~handle() = default;
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expected<void, shared_memory_error> initialize(const std::string& key, boost::interprocess::managed_mapped_file* mmf) {
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try {
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_mmf = mmf;
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detail::type_factory<Ty> fac;
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_ptr = fac.create(key, mmf);
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return expected<void, shared_memory_error>();
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}
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catch (boost::interprocess::interprocess_exception) {
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return make_unexpected(shared_memory_error::error_mapping_memory);
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}
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}
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operator Ty& () {
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return *_ptr;
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}
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private:
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Ty* _ptr;
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boost::interprocess::managed_mapped_file* _mmf;
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};
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}
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}
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