mirror of
https://github.com/matrix-construct/construct
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69 lines
2.7 KiB
C++
69 lines
2.7 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_DB_DATABASE_CACHE_H
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// This file is not part of the standard include stack because it requires
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// RocksDB symbols which we cannot forward declare. It is used internally
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// and does not need to be included by general users of IRCd.
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/// This is an internal wrapper over RocksDB's cache implementation. This is
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/// not the public interface to the caches intended to be used by developers
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/// of IRCd; that interface is instead found in db/cache.h.
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struct ircd::db::database::cache
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final
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:std::enable_shared_from_this<ircd::db::database::cache>
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,rocksdb::Cache
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{
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using Slice = rocksdb::Slice;
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using Status = rocksdb::Status;
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using deleter = void (*)(const Slice &key, void *value);
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using callback = void (*)(void *, size_t);
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using Statistics = rocksdb::Statistics;
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static const ssize_t DEFAULT_SHARD_BITS;
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static const double DEFAULT_HI_PRIO;
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static const bool DEFAULT_STRICT;
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database *d;
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std::string name;
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std::shared_ptr<struct database::stats> stats;
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std::shared_ptr<rocksdb::Cache> c;
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const char *Name() const noexcept override;
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Status Insert(const Slice &key, void *value, size_t charge, deleter, Handle **, Priority) noexcept override;
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Handle *Lookup(const Slice &key, Statistics *) noexcept override;
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bool Ref(Handle *) noexcept override;
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bool Release(Handle *, bool force_erase) noexcept override;
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void *Value(Handle *) noexcept override;
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void Erase(const Slice &key) noexcept override;
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uint64_t NewId() noexcept override;
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void SetCapacity(size_t capacity) noexcept override;
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void SetStrictCapacityLimit(bool strict_capacity_limit) noexcept override;
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bool HasStrictCapacityLimit() const noexcept override;
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size_t GetCapacity() const noexcept override;
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size_t GetUsage() const noexcept override;
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size_t GetUsage(Handle *) const noexcept override;
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size_t GetPinnedUsage() const noexcept override;
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void DisownData() noexcept override;
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void ApplyToAllCacheEntries(callback, bool thread_safe) noexcept override;
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void EraseUnRefEntries() noexcept override;
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std::string GetPrintableOptions() const noexcept override;
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void TEST_mark_as_data_block(const Slice &key, size_t charge) noexcept override;
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cache(database *const &,
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std::shared_ptr<struct database::stats>,
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std::string name,
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const ssize_t &initial_capacity = -1);
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~cache() noexcept override;
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};
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