mirror of
https://github.com/matrix-construct/construct
synced 2024-07-09 12:08:36 +02:00
90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
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/*
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* Copyright (C) 2017 Charybdis Development Team
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* Copyright (C) 2017 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.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#pragma once
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#define HAVE_IRCD_DB_TXN_H
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namespace ircd::db
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{
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struct txn;
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void for_each(const txn &, const std::function<void (const delta &)> &);
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std::string debug(const txn &);
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}
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class ircd::db::txn
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{
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database *d {nullptr};
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std::unique_ptr<rocksdb::WriteBatch> wb;
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public:
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struct opts;
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struct append;
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struct handler;
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struct checkpoint;
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explicit operator const rocksdb::WriteBatch &() const;
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explicit operator const database &() const;
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explicit operator rocksdb::WriteBatch &();
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explicit operator database &();
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bool has(const op &) const;
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size_t bytes() const;
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size_t size() const;
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// commit
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void operator()(database &, const sopts & = {});
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void operator()(const sopts & = {});
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// clear
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void clear();
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txn() = default;
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txn(database &);
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txn(database &, const opts &);
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~txn() noexcept;
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};
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struct ircd::db::txn::checkpoint
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{
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txn &t;
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checkpoint(txn &);
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~checkpoint() noexcept;
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};
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struct ircd::db::txn::append
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{
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append(txn &, database &, const delta &);
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append(txn &, column &, const column::delta &);
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append(txn &, const cell::delta &);
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append(txn &, const row::delta &);
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append(txn &, const delta &);
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append(txn &, const string_view &key, const json::iov &);
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};
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struct ircd::db::txn::opts
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{
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size_t reserve_bytes = 0;
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size_t max_bytes = 0;
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};
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