From e140ec960bec2a3c2b867361af35b312a5bbc53d Mon Sep 17 00:00:00 2001
From: Stefan Boberg <stefan@boberg.org>
Date: Thu, 28 Oct 2021 13:58:28 +0200
Subject: gc: Implemented initial root gathering for projects/oplogs

---
 zenserver/projectstore.cpp | 56 ++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 52 insertions(+), 4 deletions(-)

(limited to 'zenserver/projectstore.cpp')

diff --git a/zenserver/projectstore.cpp b/zenserver/projectstore.cpp
index 73d61c124..72d7284a0 100644
--- a/zenserver/projectstore.cpp
+++ b/zenserver/projectstore.cpp
@@ -298,6 +298,36 @@ ProjectStore::Oplog::Flush()
 	m_Storage->Flush();
 }
 
+void
+ProjectStore::Oplog::Scrub(ScrubContext& Ctx) const
+{
+	ZEN_UNUSED(Ctx);
+}
+
+void
+ProjectStore::Oplog::GatherReferences(GcContext& GcCtx) const
+{
+	RwLock::SharedLockScope _(m_OplogLock);
+
+	std::vector<IoHash> Hashes;
+
+	for (const auto& Kv : m_ChunkMap)
+	{
+		Hashes.push_back(Kv.second);
+	}
+
+	GcCtx.ContributeCids(Hashes);
+
+	Hashes.clear();
+
+	for (const auto& Kv : m_MetaMap)
+	{
+		Hashes.push_back(Kv.second);
+	}
+
+	GcCtx.ContributeCids(Hashes);
+}
+
 bool
 ProjectStore::Oplog::ExistsAt(std::filesystem::path BasePath)
 {
@@ -750,7 +780,7 @@ ProjectStore::Project::DeleteOplog(std::string_view OplogId)
 void
 ProjectStore::Project::IterateOplogs(std::function<void(const Oplog&)>&& Fn) const
 {
-	// TODO: should iterate over oplogs which are present on disk but not yet loaded
+	// TODO: should also iterate over oplogs which are present on disk but not yet loaded
 
 	RwLock::SharedLockScope _(m_ProjectLock);
 
@@ -769,13 +799,20 @@ ProjectStore::Project::Flush()
 void
 ProjectStore::Project::Scrub(ScrubContext& Ctx)
 {
-	ZEN_UNUSED(Ctx);
+	IterateOplogs([&](const Oplog& Ops) { Ops.Scrub(Ctx); });
+}
+
+void
+ProjectStore::Project::GatherReferences(GcContext& GcCtx)
+{
+	IterateOplogs([&](const Oplog& Ops) { Ops.GatherReferences(GcCtx); });
 }
 
 //////////////////////////////////////////////////////////////////////////
 
-ProjectStore::ProjectStore(CidStore& Store, std::filesystem::path BasePath)
-: m_Log(zen::logging::Get("project"))
+ProjectStore::ProjectStore(CidStore& Store, std::filesystem::path BasePath, CasGc& Gc)
+: GcContributor(Gc)
+, m_Log(zen::logging::Get("project"))
 , m_ProjectBasePath(BasePath)
 , m_CidStore(Store)
 {
@@ -818,6 +855,17 @@ ProjectStore::Scrub(ScrubContext& Ctx)
 	}
 }
 
+void
+ProjectStore::GatherReferences(GcContext& GcCtx)
+{
+	RwLock::SharedLockScope _(m_ProjectsLock);
+
+	for (auto& Kv : m_Projects)
+	{
+		Kv.second.GatherReferences(GcCtx);
+	}
+}
+
 ProjectStore::Project*
 ProjectStore::OpenProject(std::string_view ProjectId)
 {
-- 
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