mirror of
https://github.com/matrix-construct/construct
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46 lines
1.5 KiB
C++
46 lines
1.5 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 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_READ_H
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namespace ircd::fs
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{
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struct read_opts extern const read_opts_default;
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// Yields ircd::ctx for read into buffer; returns view of read portion.
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const_buffer read(const fd &, const mutable_buffer &, const read_opts & = read_opts_default);
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const_buffer read(const string_view &path, const mutable_buffer &, const read_opts & = read_opts_default);
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// Yields ircd::ctx for read into allocated string; returns that string
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std::string read(const fd &, const read_opts & = read_opts_default);
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std::string read(const string_view &path, const read_opts & = read_opts_default);
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// Prefetch bytes for subsequent read(); offset is given in opts.
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void prefetch(const fd &, const size_t &, const read_opts & = read_opts_default);
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}
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/// Options for a read operation
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struct ircd::fs::read_opts
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{
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read_opts() = default;
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read_opts(const off_t &);
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/// Offset in the file to start the read from.
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off_t offset {0};
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/// Request priority (this option may be improved, avoid for now)
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int16_t priority {0};
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};
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inline
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ircd::fs::read_opts::read_opts(const off_t &offset)
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:offset{offset}
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{}
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