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/*
Userspace Virtual Filesystem
Copyright (C) 2015 Sebastian Herbord. All rights reserved.
This file is part of usvfs.
usvfs 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, either version 3 of the License, or
(at your option) any later version.
usvfs 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 usvfs. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
namespace bi = boost::interprocess;
namespace bc = boost::container;
namespace usvfs::shared
{
template <typename T>
using OffsetPtrT = bi::offset_ptr<T, std::int32_t, std::uint64_t>;
using VoidPointerT = OffsetPtrT<void>;
// important: the windows shared memory mechanism, unlike other implementations,
// automatically removes the SHM object when there are no more "subscribers".
// MO currently depends on that feature!
// managed_windows_shared_memory apparently doesn't support sharing between
// 64bit and 32bit processes
using managed_windows_shared_memory = bi::basic_managed_windows_shared_memory<
char, bi::rbtree_best_fit<bi::mutex_family, VoidPointerT, 8>, bi::iset_index>;
using SharedMemoryT = managed_windows_shared_memory;
using SegmentManagerT = SharedMemoryT::segment_manager;
using VoidAllocatorT = boost::container::scoped_allocator_adaptor<
boost::interprocess::allocator<void, SegmentManagerT>>;
using CharAllocatorT = VoidAllocatorT::rebind<char>::other;
using StringT = bc::basic_string<char, std::char_traits<char>, CharAllocatorT>;
} // namespace usvfs::shared
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