mirror of
https://github.com/facebook/sapling.git
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0a6aa21d77
Summary: This is a rough pass that resolves a linker issue on MSVC by switching to inline static member functions. Reviewed By: chadaustin Differential Revision: D20529163 fbshipit-source-id: 578ed440758c685091d3e039e261638e027db17a
104 lines
2.5 KiB
C++
104 lines
2.5 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This software may be used and distributed according to the terms of the
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* GNU General Public License version 2.
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*/
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#pragma once
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#include <memory>
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#include <vector>
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#include "eden/fs/store/ImportPriority.h"
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namespace folly {
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template <typename T>
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class Future;
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struct Unit;
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} // namespace folly
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namespace facebook {
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namespace eden {
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class Blob;
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class BlobMetadata;
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class Hash;
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class Tree;
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/**
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* ObjectStore calls methods on this context when fetching objects.
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* It's primarily used to track when and why source control objects are fetched.
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*/
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class ObjectFetchContext {
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public:
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/**
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* Which object type was fetched.
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*
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* Suitable for use as an index into an array of size kObjectTypeEnumMax
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*/
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enum ObjectType : unsigned {
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Blob,
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BlobMetadata,
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Tree,
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kObjectTypeEnumMax,
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};
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/**
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* Which cache satisfied a lookup request.
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*
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* Suitable for use as an index into an array of size kOriginEnumMax.
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*/
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enum Origin : unsigned {
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FromMemoryCache,
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FromDiskCache,
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FromBackingStore,
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kOriginEnumMax,
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};
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ObjectFetchContext() = default;
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virtual ~ObjectFetchContext() = default;
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virtual void didFetch(ObjectType, const Hash&, Origin) {}
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/**
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* Return a no-op fetch context suitable when no tracking is desired.
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*/
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static ObjectFetchContext& getNullContext();
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private:
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ObjectFetchContext(const ObjectFetchContext&) = delete;
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ObjectFetchContext& operator=(const ObjectFetchContext&) = delete;
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};
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class IObjectStore {
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public:
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virtual ~IObjectStore() {}
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/*
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* Object access APIs.
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*
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* The given ObjectFetchContext must remain valid at least until the
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* resulting future is complete.
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*/
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virtual folly::Future<std::shared_ptr<const Tree>> getTree(
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const Hash& id,
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ObjectFetchContext& context) const = 0;
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virtual folly::Future<std::shared_ptr<const Blob>> getBlob(
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const Hash& id,
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ObjectFetchContext& context,
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ImportPriority priority = ImportPriority::kNormal()) const = 0;
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virtual folly::Future<std::shared_ptr<const Tree>> getTreeForCommit(
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const Hash& commitID,
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ObjectFetchContext& context) const = 0;
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virtual folly::Future<std::shared_ptr<const Tree>> getTreeForManifest(
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const Hash& commitID,
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const Hash& manifestID,
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ObjectFetchContext& context) const = 0;
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virtual folly::Future<folly::Unit> prefetchBlobs(
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const std::vector<Hash>& ids,
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ObjectFetchContext& context) const = 0;
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};
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} // namespace eden
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} // namespace facebook
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