mirror of
https://github.com/matrix-construct/construct
synced 2024-11-05 05:18:54 +01:00
61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_FS_MAP_H
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namespace ircd::fs
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{
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struct map;
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size_t advise(const map &, const int &, const size_t &, const opts & = opts_default);
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size_t prefetch(const map &, const size_t &size, const opts & = opts_default);
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size_t evict(const map &, const size_t &size, const opts & = opts_default);
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}
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/// Interface to map file into memory.
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///
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/// Note that this was created specifically for file maps and not intended to
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/// be a generic mmap(2) interface, at least for now.
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struct ircd::fs::map
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:mutable_buffer
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{
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struct opts;
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map() = default;
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map(const fd &, const opts &opts, const size_t &size = 0UL);
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map(map &&) noexcept;
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map(const map &) = delete;
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map &operator=(map &&) noexcept;
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map &operator=(const map &) = delete;
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~map() noexcept;
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};
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/// Descriptor options (open options)
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struct ircd::fs::map::opts
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:fd::opts
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{
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bool execute {false};
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bool shared {false};
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bool reserve {false};
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bool populate {false};
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opts(const fd::opts &opts = {std::ios::in})
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:fd::opts(opts)
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{}
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};
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inline
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ircd::fs::map::map(map &&other)
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noexcept
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:mutable_buffer{other}
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{
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static_cast<mutable_buffer &>(other) = {};
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}
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