cas: added some GC stubs

1 files changed, 14 insertions, 0 deletions

diff --git a/zenstore/include/zenstore/CAS.h b/zenstore/include/zenstore/CAS.h
index 93454ca6f..1425845a0 100644
--- a/zenstore/include/zenstore/CAS.h
+++ b/zenstore/include/zenstore/CAS.h
@@ -37,7 +37,16 @@ struct CasStoreConfiguration
 class GcContext
 {
 public:
+	GcContext();
+	~GcContext();
+
+	void ContributeCids(std::span<const IoHash> Cid);
+	void ContributeCas(std::span<const IoHash> Hash);
+
 private:
+	struct GcState;
+
+	std::unique_ptr<GcState> m_State;
 };
 
 /** Context object for data scrubbing
@@ -58,10 +67,14 @@ private:
 	bool	 m_Recover	 = true;
 };
 
+/** Manage a set of IoHash values
+ */
+
 class CasChunkSet
 {
 public:
 	void						AddChunkToSet(const IoHash& HashToAdd);
+	void						AddChunksToSet(std::span<const IoHash> HashesToAdd);
 	void						RemoveChunksIf(std::function<bool(const IoHash& CandidateHash)>&& Predicate);
 	void						IterateChunks(std::function<void(const IoHash& ChunkHash)>&& Callback);
 	inline [[nodiscard]] bool	ContainsChunk(const IoHash& Hash) const { return m_ChunkSet.find(Hash) != m_ChunkSet.end(); }
@@ -69,6 +82,7 @@ public:
 	inline [[nodiscard]] size_t GetSize() const { return m_ChunkSet.size(); }
 
 private:
+	// Q: should we protect this with a lock, or is that a higher level concern?
 	std::unordered_set<IoHash> m_ChunkSet;
 };