gecko-dev/xpcom/base/nsCOMPtr.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */

#include "nsCOMPtr.h"

nsresult
nsQueryInterface::operator()(const nsIID& aIID, void** aAnswer) const
{
  nsresult status;
  if (mRawPtr) {
    status = mRawPtr->QueryInterface(aIID, aAnswer);
  } else {
    status = NS_ERROR_NULL_POINTER;
  }

  return status;
}

nsresult
nsQueryInterfaceWithError::operator()(const nsIID& aIID, void** aAnswer) const
{
  nsresult status;
  if (mRawPtr) {
    status = mRawPtr->QueryInterface(aIID, aAnswer);
  } else {
    status = NS_ERROR_NULL_POINTER;
  }

  if (mErrorPtr) {
    *mErrorPtr = status;
  }
  return status;
}

void
nsCOMPtr_base::assign_with_AddRef(nsISupports* aRawPtr)
{
  if (aRawPtr) {
    NSCAP_ADDREF(this, aRawPtr);
  }
  assign_assuming_AddRef(aRawPtr);
}

void
nsCOMPtr_base::assign_from_qi(const nsQueryInterface aQI, const nsIID& aIID)
{
  void* newRawPtr;
  if (NS_FAILED(aQI(aIID, &newRawPtr))) {
    newRawPtr = nullptr;
  }
  assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
}

void
nsCOMPtr_base::assign_from_qi_with_error(const nsQueryInterfaceWithError& aQI,
                                         const nsIID& aIID)
{
  void* newRawPtr;
  if (NS_FAILED(aQI(aIID, &newRawPtr))) {
    newRawPtr = nullptr;
  }
  assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
}

void
nsCOMPtr_base::assign_from_gs_cid(const nsGetServiceByCID aGS,
                                  const nsIID& aIID)
{
  void* newRawPtr;
  if (NS_FAILED(aGS(aIID, &newRawPtr))) {
    newRawPtr = nullptr;
  }
  assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
}

void
nsCOMPtr_base::assign_from_gs_cid_with_error(
    const nsGetServiceByCIDWithError& aGS, const nsIID& aIID)
{
  void* newRawPtr;
  if (NS_FAILED(aGS(aIID, &newRawPtr))) {
    newRawPtr = nullptr;
  }
  assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
}

void
nsCOMPtr_base::assign_from_gs_contractid(const nsGetServiceByContractID aGS,
                                         const nsIID& aIID)
{
  void* newRawPtr;
  if (NS_FAILED(aGS(aIID, &newRawPtr))) {
    newRawPtr = nullptr;
  }
  assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
}

void
nsCOMPtr_base::assign_from_gs_contractid_with_error(
    const nsGetServiceByContractIDWithError& aGS, const nsIID& aIID)
{
  void* newRawPtr;
  if (NS_FAILED(aGS(aIID, &newRawPtr))) {
    newRawPtr = nullptr;
  }
  assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
}

void
nsCOMPtr_base::assign_from_query_referent(
    const nsQueryReferent& aQueryReferent, const nsIID& aIID)
{
  void* newRawPtr;
  if (NS_FAILED(aQueryReferent(aIID, &newRawPtr))) {
    newRawPtr = nullptr;
  }
  assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
}

void
nsCOMPtr_base::assign_from_helper(const nsCOMPtr_helper& aHelper,
                                  const nsIID& aIID)
{
  void* newRawPtr;
  if (NS_FAILED(aHelper(aIID, &newRawPtr))) {
    newRawPtr = nullptr;
  }
  assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
}

void**
nsCOMPtr_base::begin_assignment()
{
  assign_assuming_AddRef(nullptr);
  return reinterpret_cast<void**>(&mRawPtr);
}