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65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2019 Telegram Systems LLP
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*/
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#pragma once
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#include "td/utils/common.h"
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#include "td/utils/port/FileFd.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Status.h"
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namespace td {
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class MemoryMapping {
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public:
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struct Options {
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int64 offset{0};
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int64 size{-1};
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Options() {
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}
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Options &with_offset(int64 new_offset) {
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offset = new_offset;
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return *this;
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}
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Options &with_size(int64 new_size) {
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size = new_size;
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return *this;
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}
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};
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static Result<MemoryMapping> create_anonymous(const Options &options = {});
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static Result<MemoryMapping> create_from_file(const FileFd &file, const Options &options = {});
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Slice as_slice() const;
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MutableSlice as_mutable_slice(); // returns empty slice if memory is read-only
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MemoryMapping(const MemoryMapping &other) = delete;
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const MemoryMapping &operator=(const MemoryMapping &other) = delete;
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MemoryMapping(MemoryMapping &&other);
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MemoryMapping &operator=(MemoryMapping &&other);
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~MemoryMapping();
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private:
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class Impl;
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unique_ptr<Impl> impl_;
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explicit MemoryMapping(unique_ptr<Impl> impl);
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};
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} // namespace td
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