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7a67baf951
This is slightly more accurate considering that an outdated record
may exist in the persistent cache. Possibly-outdated records are
quite relevant as they may be foreign keys to more recent information
that we want to keep, but we will not return them here.
(cherry picked from commit 29f0b196f4)
48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
#pragma once
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#include "ref.hh"
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#include "nar-info.hh"
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#include "realisation.hh"
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namespace nix {
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class NarInfoDiskCache
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{
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public:
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typedef enum { oValid, oInvalid, oUnknown } Outcome;
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virtual ~NarInfoDiskCache() { }
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virtual void createCache(const std::string & uri, const Path & storeDir,
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bool wantMassQuery, int priority) = 0;
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struct CacheInfo
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{
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bool wantMassQuery;
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int priority;
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};
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virtual std::optional<CacheInfo> upToDateCacheExists(const std::string & uri) = 0;
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virtual std::pair<Outcome, std::shared_ptr<NarInfo>> lookupNarInfo(
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const std::string & uri, const std::string & hashPart) = 0;
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virtual void upsertNarInfo(
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const std::string & uri, const std::string & hashPart,
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std::shared_ptr<const ValidPathInfo> info) = 0;
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virtual void upsertRealisation(
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const std::string & uri,
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const Realisation & realisation) = 0;
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virtual void upsertAbsentRealisation(
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const std::string & uri,
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const DrvOutput & id) = 0;
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virtual std::pair<Outcome, std::shared_ptr<Realisation>> lookupRealisation(
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const std::string & uri, const DrvOutput & id) = 0;
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};
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/* Return a singleton cache object that can be used concurrently by
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multiple threads. */
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ref<NarInfoDiskCache> getNarInfoDiskCache();
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}
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