mirror of
https://github.com/matrix-construct/construct
synced 2024-10-30 02:18:58 +01:00
62 lines
1.5 KiB
C++
62 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) 2016-2019 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_FS_IOU_H
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#include <linux/io_uring.h>
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namespace ircd::fs::iou
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{
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struct system;
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struct request;
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size_t write(const fd &, const const_iovec_view &, const write_opts &);
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size_t read(const fd &, const const_iovec_view &, const read_opts &);
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void fsync(const fd &, const sync_opts &);
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}
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struct ircd::fs::iou::system
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{
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ctx::dock dock;
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::io_uring_params p;
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fs::fd fd;
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size_t sq_len, cq_len, sqe_len;
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custom_ptr<uint8_t> sq_p, cq_p, sqe_p;
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uint32_t *head[2];
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uint32_t *tail[2];
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uint32_t *ring_mask[2];
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uint32_t *ring_entries[2];
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uint32_t *flags[2];
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uint32_t *dropped[2];
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uint32_t *overflow[2];
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uint32_t *sq;
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::io_uring_sqe *sqe;
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::io_uring_cqe *cqe;
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size_t ev_count;
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asio::posix::stream_descriptor ev_fd;
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bool handle_set;
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size_t handle_size;
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std::unique_ptr<uint8_t[]> handle_data;
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static ios::descriptor handle_descriptor;
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void handle_events() noexcept;
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void handle(const boost::system::error_code &ec, const size_t bytes) noexcept;
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void set_handle();
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bool interrupt();
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bool wait();
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system(const size_t &max_events,
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const size_t &max_submit);
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~system() noexcept;
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};
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