mirror of
https://github.com/matrix-construct/construct
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58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
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// 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_IRCD_DB_PREFETCHER_H
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namespace ircd::db
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{
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struct prefetcher extern *prefetcher;
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}
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struct ircd::db::prefetcher
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{
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struct request;
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using closure = std::function<bool (request &)>;
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ctx::dock dock;
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std::deque<request> queue;
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ctx::context context;
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size_t handles {0};
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size_t request_workers {0};
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size_t request_counter {0};
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size_t handles_counter {0};
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size_t fetched_counter {0};
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size_t cancels_counter {0};
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size_t wait_pending();
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void request_handle(request &);
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void request_worker();
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void handle();
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void worker();
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public:
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size_t cancel(const closure &);
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size_t cancel(database &); // Cancel all for db
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size_t cancel(column &); // Cancel all for column
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bool operator()(column &, const string_view &key, const gopts &);
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prefetcher();
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~prefetcher() noexcept;
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};
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struct ircd::db::prefetcher::request
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{
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std::string key;
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database *d {nullptr};
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steady_point start;
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uint32_t cid {0};
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};
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