mirror of
https://github.com/matrix-construct/construct
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46 lines
1.7 KiB
C++
46 lines
1.7 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_SYNC_H
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namespace ircd::fs
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{
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struct sync_opts extern const sync_opts_default;
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void flush(const fd &, const off_t &, const size_t &, const sync_opts & = sync_opts_default);
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void flush(const fd &, const sync_opts & = sync_opts_default);
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void sync(const fd &, const off_t &, const size_t &, const sync_opts & = sync_opts_default);
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void sync(const fd &, const sync_opts & = sync_opts_default);
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}
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/// Options for a write operation
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struct ircd::fs::sync_opts
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{
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sync_opts() = default;
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/// Set to true to flush metadata; otherwise only data is flushed.
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/// This ends up forcing the use of fsync() rather than fdatasync() or
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/// sync_file_range() et al.
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bool metadata {true};
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/// Determines whether this operation is conducted via AIO. If not, a
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/// direct syscall is made. Using AIO will only block one ircd::ctx while
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/// a direct syscall will block the thread (all contexts). If AIO is not
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/// available or not enabled, or doesn't support this operation, setting
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/// this has no effect.
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bool aio {true};
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/// Request priority. This value is ignored by the kernel for the
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/// operations provided by this interface. It is still provided for
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/// consistency and may be used internally by IRCd in the future.
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int8_t priority {-1};
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};
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