Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/src/rgw/driver/dbstore/sqlite/connection.h b/src/rgw/driver/dbstore/sqlite/connection.h
new file mode 100644
index 000000000..6088763fd
--- /dev/null
+++ b/src/rgw/driver/dbstore/sqlite/connection.h
@@ -0,0 +1,64 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab ft=cpp
+
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2022 Red Hat, Inc.
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#pragma once
+
+#include <memory>
+#include <sqlite3.h>
+
+#include <fmt/format.h>
+
+#include "sqlite/statement.h"
+
+class DoutPrefixProvider;
+
+namespace rgw::dbstore::sqlite {
+
+// owning sqlite3 pointer
+struct db_deleter {
+  void operator()(sqlite3* p) const { ::sqlite3_close(p); }
+};
+using db_ptr = std::unique_ptr<sqlite3, db_deleter>;
+
+
+// open the database file or throw on error
+db_ptr open_database(const char* filename, int flags);
+
+
+struct Connection {
+  db_ptr db;
+  // map of statements, prepared on first use
+  std::map<std::string_view, stmt_ptr> statements;
+
+  explicit Connection(db_ptr db) : db(std::move(db)) {}
+};
+
+// sqlite connection factory for ConnectionPool
+class ConnectionFactory {
+  std::string uri;
+  int flags;
+ public:
+  ConnectionFactory(std::string uri, int flags)
+      : uri(std::move(uri)), flags(flags) {}
+
+  auto operator()(const DoutPrefixProvider* dpp)
+    -> std::unique_ptr<Connection>
+  {
+    auto db = open_database(uri.c_str(), flags);
+    return std::make_unique<Connection>(std::move(db));
+  }
+};
+
+} // namespace rgw::dbstore::sqlite