зеркало из https://github.com/mozilla/gecko-dev.git
100 строки
3.1 KiB
C++
100 строки
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ipc/IPCMessageUtils.h"
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#include "mozilla/ErrorResult.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/Move.h"
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#ifndef IPC_ErrorIPCUtils_h
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# define IPC_ErrorIPCUtils_h
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namespace IPC {
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template <>
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struct ParamTraits<mozilla::dom::ErrNum>
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: public ContiguousEnumSerializer<
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mozilla::dom::ErrNum, mozilla::dom::ErrNum(0),
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mozilla::dom::ErrNum(mozilla::dom::Err_Limit)> {};
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template <>
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struct ParamTraits<mozilla::ErrorResult> {
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typedef mozilla::ErrorResult paramType;
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static void Write(Message* aMsg, const paramType& aParam) {
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// It should be the case that mMightHaveUnreportedJSException can only be
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// true when we're expecting a JS exception. We cannot send such messages
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// over the IPC channel since there is no sane way of transferring the JS
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// value over to the other side. Callers should never do that.
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MOZ_ASSERT_IF(aParam.IsJSException(),
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aParam.mMightHaveUnreportedJSException);
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if (aParam.IsJSException()
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# ifdef DEBUG
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|| aParam.mMightHaveUnreportedJSException
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# endif
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) {
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MOZ_CRASH(
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"Cannot encode an ErrorResult representing a Javascript exception");
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}
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WriteParam(aMsg, aParam.mResult);
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WriteParam(aMsg, aParam.IsErrorWithMessage());
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WriteParam(aMsg, aParam.IsDOMException());
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if (aParam.IsErrorWithMessage()) {
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aParam.SerializeMessage(aMsg);
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} else if (aParam.IsDOMException()) {
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aParam.SerializeDOMExceptionInfo(aMsg);
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}
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}
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static bool Read(const Message* aMsg, PickleIterator* aIter,
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paramType* aResult) {
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paramType readValue;
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if (!ReadParam(aMsg, aIter, &readValue.mResult)) {
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return false;
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}
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bool hasMessage = false;
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if (!ReadParam(aMsg, aIter, &hasMessage)) {
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return false;
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}
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bool hasDOMExceptionInfo = false;
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if (!ReadParam(aMsg, aIter, &hasDOMExceptionInfo)) {
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return false;
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}
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if (hasMessage && hasDOMExceptionInfo) {
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// Shouldn't have both!
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return false;
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}
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if (hasMessage && !readValue.DeserializeMessage(aMsg, aIter)) {
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return false;
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} else if (hasDOMExceptionInfo &&
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!readValue.DeserializeDOMExceptionInfo(aMsg, aIter)) {
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return false;
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}
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*aResult = std::move(readValue);
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return true;
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}
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};
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template <>
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struct ParamTraits<mozilla::CopyableErrorResult> {
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typedef mozilla::CopyableErrorResult paramType;
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static void Write(Message* aMsg, const paramType& aParam) {
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ParamTraits<mozilla::ErrorResult>::Write(aMsg, aParam);
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}
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static bool Read(const Message* aMsg, PickleIterator* aIter,
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paramType* aResult) {
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mozilla::ErrorResult& ref = static_cast<mozilla::ErrorResult&>(*aResult);
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return ParamTraits<mozilla::ErrorResult>::Read(aMsg, aIter, &ref);
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}
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};
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} // namespace IPC
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#endif
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