about summary refs log blame commit diff
path: root/src/libstore/nar-info-disk-cache.hh
blob: f4e3fbbdcbdcab12ebf6023e2881b5bddb1c7c7c (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
















                                                                       
                                                                   

                               

                                                              






                                                                   
#pragma once

#include "ref.hh"
#include "nar-info.hh"

namespace nix {

class NarInfoDiskCache
{
public:
    typedef enum { oValid, oInvalid, oUnknown } Outcome;

    virtual void createCache(const std::string & uri) = 0;

    virtual bool cacheExists(const std::string & uri) = 0;

    virtual std::pair<Outcome, std::shared_ptr<NarInfo>> lookupNarInfo(
        const std::string & uri, const std::string & hashPart) = 0;

    virtual void upsertNarInfo(
        const std::string & uri, const std::string & hashPart,
        std::shared_ptr<ValidPathInfo> info) = 0;
};

/* Return a singleton cache object that can be used concurrently by
   multiple threads. */
ref<NarInfoDiskCache> getNarInfoDiskCache();

}