storage/mozStorageStatementJSHelper.h
author WR Updater Bot <graphics-team@mozilla.staktrace.com>
Thu, 03 Jan 2019 03:57:27 +0000
changeset 452371 37c0d21de4a5f56800548d867c8ebd5a9d92dc98
parent 448947 6f3709b3878117466168c40affa7bca0b60cf75b
child 472056 e1993a1f09ac53cd1a04fdf6a87f8cad8e44f73e
permissions -rw-r--r--
Bug 1517072 - Update webrender to commit 7fc05244e1400acfde1d0a0a4a564e47dc2ef998 (WR PR #3455). r=kats https://github.com/servo/webrender/pull/3455 Differential Revision: https://phabricator.services.mozilla.com/D15632

/* -*- 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"
#include "nsIXPConnect.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