1 files changed, 58 insertions, 0 deletions
diff --git a/storage/mozStorageAsyncStatementJSHelper.h b/storage/mozStorageAsyncStatementJSHelper.h
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+++ b/storage/mozStorageAsyncStatementJSHelper.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 mozilla_storage_mozStorageAsyncStatementJSHelper_h_
+#define mozilla_storage_mozStorageAsyncStatementJSHelper_h_
+
+#include "nsIXPCScriptable.h"
+
+namespace mozilla {
+namespace storage {
+
+class AsyncStatement;
+class AsyncStatementParams;
+
+/**
+ * A modified version of StatementJSHelper that only exposes the async-specific
+ * 'params' helper.  We do not expose 'row' or 'step' as they do not apply to
+ * us.
+ */
+class AsyncStatementJSHelper : public nsIXPCScriptable {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIXPCSCRIPTABLE
+
+ private:
+  nsresult getParams(AsyncStatement*, JSContext*, JSObject*, JS::Value*);
+};
+
+/**
+ * Wrapper 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 AsyncStatementParamsHolder final : public nsISupports {
+ public:
+  NS_DECL_ISUPPORTS
+
+  explicit AsyncStatementParamsHolder(AsyncStatementParams* aParams)
+      : mParams(aParams) {}
+
+  AsyncStatementParams* Get() const {
+    MOZ_ASSERT(mParams);
+    return mParams;
+  }
+
+ private:
+  virtual ~AsyncStatementParamsHolder();
+
+  RefPtr<AsyncStatementParams> mParams;
+};
+
+}  // namespace storage
+}  // namespace mozilla
+
+#endif  // mozilla_storage_mozStorageAsyncStatementJSHelper_h_