storage/mozStorageStatementParams.h
author Masayuki Nakano <masayuki@d-toybox.com>
Thu, 10 Jan 2019 08:50:41 +0000
changeset 453219 99a977d519a0b78e267d3dce4afb009b8d3be769
parent 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 181137 - part 8: Make ContentIteratorBase and its subclasses non-refcountable r=smaug This patch makes ContentIteratorBase, PostContentIterator, PreContentIterator and ContentSubtreeIterator classes non-refcountable because most users can create their instances in stack and such users may be in a hot path. So, we can save a lot of cost of instantiation. Unfortunately, only ScriptableContentIterator creates one of the concrete classes and needs to destroy it properly. Therefore, its EnsureContentIterator(), destructor, traverse and unlink code becomes messy. However, ScriptableContentIterator was designed for automated tests and we need to maintain it not so many times. Therefore, improvement of other users must be worthwhiler than this demerit. Differential Revision: https://phabricator.services.mozilla.com/D15928

/* -*- 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 MOZSTORAGESTATEMENTPARAMS_H
#define MOZSTORAGESTATEMENTPARAMS_H

#include "mozilla/Attributes.h"
#include "mozilla/ErrorResult.h"
#include "nsPIDOMWindow.h"
#include "nsWrapperCache.h"

namespace mozilla {
namespace storage {

class Statement;

class StatementParams final : public nsISupports, public nsWrapperCache {
 public:
  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(StatementParams)

  explicit StatementParams(nsPIDOMWindowInner* aWindow, Statement* aStatement);

  void NamedGetter(JSContext* aCx, const nsAString& aName, bool& aFound,
                   JS::MutableHandle<JS::Value> aResult,
                   mozilla::ErrorResult& aRv);

  void NamedSetter(JSContext* aCx, const nsAString& aName,
                   JS::Handle<JS::Value> aValue, mozilla::ErrorResult& aRv);

  uint32_t Length() const { return mParamCount; }

  void IndexedGetter(JSContext* aCx, uint32_t aIndex, bool& aFound,
                     JS::MutableHandle<JS::Value> aResult,
                     mozilla::ErrorResult& aRv);

  void IndexedSetter(JSContext* aCx, uint32_t aIndex,
                     JS::Handle<JS::Value> aValue, mozilla::ErrorResult& aRv);

  void GetSupportedNames(nsTArray<nsString>& aNames);

  JSObject* WrapObject(JSContext* aCx,
                       JS::Handle<JSObject*> aGivenProto) override;

  nsPIDOMWindowInner* GetParentObject() const { return mWindow; }

 private:
  ~StatementParams() {}

  nsCOMPtr<nsPIDOMWindowInner> mWindow;
  Statement* mStatement;
  uint32_t mParamCount;

  friend class StatementParamsHolder;
};

}  // namespace storage
}  // namespace mozilla

#endif /* MOZSTORAGESTATEMENTPARAMS_H */