1 files changed, 73 insertions, 0 deletions
diff --git a/storage/mozStorageStatementJSHelper.h b/storage/mozStorageStatementJSHelper.h
new file mode 100644
index 0000000000..0061d7d6a0
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+++ b/storage/mozStorageStatementJSHelper.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZSTORAGESTATEMENTJSHELPER_H
+#define MOZSTORAGESTATEMENTJSHELPER_H
+
+#include "nsIXPCScriptable.h"
+
+class Statement;
+
+namespace mozilla {
+namespace storage {
+
+class StatementParams;
+class StatementRow;
+
+class StatementJSHelper : public nsIXPCScriptable {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIXPCSCRIPTABLE
+
+ private:
+  nsresult getRow(Statement*, JSContext*, JSObject*, JS::Value*);
+  nsresult getParams(Statement*, JSContext*, JSObject*, JS::Value*);
+};
+
+/**
+ * Wrappers used to clean up the references JS helpers hold to the statement.
+ * For cycle-avoidance reasons they do not hold reference-counted references,
+ * so it is important we do this.
+ */
+
+class StatementParamsHolder final : public nsISupports {
+ public:
+  NS_DECL_ISUPPORTS
+
+  explicit StatementParamsHolder(StatementParams* aParams) : mParams(aParams) {}
+
+  StatementParams* Get() const {
+    MOZ_ASSERT(mParams);
+    return mParams;
+  }
+
+ private:
+  virtual ~StatementParamsHolder();
+
+  RefPtr<StatementParams> mParams;
+};
+
+class StatementRowHolder final : public nsISupports {
+ public:
+  NS_DECL_ISUPPORTS
+
+  explicit StatementRowHolder(StatementRow* aRow) : mRow(aRow) {}
+
+  StatementRow* Get() const {
+    MOZ_ASSERT(mRow);
+    return mRow;
+  }
+
+ private:
+  virtual ~StatementRowHolder();
+
+  RefPtr<StatementRow> mRow;
+};
+
+}  // namespace storage
+}  // namespace mozilla
+
+#endif  // MOZSTORAGESTATEMENTJSHELPER_H