зеркало из https://github.com/mozilla/gecko-dev.git
148 строки
4.1 KiB
C++
148 строки
4.1 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
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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#ifndef IPC_GLUE_PROTOCOLMESSAGEUTILS_H
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#define IPC_GLUE_PROTOCOLMESSAGEUTILS_H
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#include <stdint.h>
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#include <string>
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#include "base/string_util.h"
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#include "chrome/common/ipc_channel.h"
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#include "chrome/common/ipc_message_utils.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/ipc/ProtocolUtils.h"
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#include "mozilla/ipc/Transport.h"
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class PickleIterator;
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namespace mozilla::ipc {
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class FileDescriptor;
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template <class PFooSide>
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class Endpoint;
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template <class PFooSide>
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class ManagedEndpoint;
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template <typename P>
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struct IPDLParamTraits;
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} // namespace mozilla::ipc
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namespace IPC {
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class Message;
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template <>
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struct ParamTraits<mozilla::ipc::ActorHandle> {
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typedef mozilla::ipc::ActorHandle paramType;
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static void Write(Message* aMsg, const paramType& aParam) {
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IPC::WriteParam(aMsg, aParam.mId);
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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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int id;
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if (IPC::ReadParam(aMsg, aIter, &id)) {
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aResult->mId = id;
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return true;
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}
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return false;
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}
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static void Log(const paramType& aParam, std::wstring* aLog) {
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aLog->append(StringPrintf(L"(%d)", aParam.mId));
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}
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};
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template <class PFooSide>
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struct ParamTraits<mozilla::ipc::Endpoint<PFooSide>> {
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typedef mozilla::ipc::Endpoint<PFooSide> paramType;
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static void Write(Message* aMsg, const paramType& aParam) {
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IPC::WriteParam(aMsg, aParam.mValid);
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if (!aParam.mValid) {
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return;
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}
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IPC::WriteParam(aMsg, static_cast<uint32_t>(aParam.mMode));
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// We duplicate the descriptor so that our own file descriptor remains
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// valid after the write. An alternative would be to set
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// aParam.mTransport.mValid to false, but that won't work because aParam
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// is const.
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mozilla::ipc::TransportDescriptor desc =
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mozilla::ipc::DuplicateDescriptor(aParam.mTransport);
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IPC::WriteParam(aMsg, desc);
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IPC::WriteParam(aMsg, aParam.mMyPid);
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IPC::WriteParam(aMsg, aParam.mOtherPid);
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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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MOZ_RELEASE_ASSERT(!aResult->mValid);
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if (!IPC::ReadParam(aMsg, aIter, &aResult->mValid)) {
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return false;
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}
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if (!aResult->mValid) {
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// Object is empty, but read succeeded.
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return true;
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}
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uint32_t mode;
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if (!IPC::ReadParam(aMsg, aIter, &mode) ||
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!IPC::ReadParam(aMsg, aIter, &aResult->mTransport) ||
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!IPC::ReadParam(aMsg, aIter, &aResult->mMyPid) ||
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!IPC::ReadParam(aMsg, aIter, &aResult->mOtherPid)) {
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return false;
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}
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aResult->mMode = Channel::Mode(mode);
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return true;
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}
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static void Log(const paramType& aParam, std::wstring* aLog) {
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aLog->append(StringPrintf(L"Endpoint"));
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}
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};
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template <class PFooSide>
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struct ParamTraits<mozilla::ipc::ManagedEndpoint<PFooSide>> {
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typedef mozilla::ipc::ManagedEndpoint<PFooSide> paramType;
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static void Write(Message* aMsg, const paramType& aParam) {
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IPC::WriteParam(aMsg, aParam.mId);
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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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MOZ_RELEASE_ASSERT(aResult->mId == 0);
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if (!IPC::ReadParam(aMsg, aIter, &aResult->mId)) {
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return false;
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}
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return true;
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}
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static void Log(const paramType& aParam, std::wstring* aLog) {
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aLog->append(StringPrintf(L"ManagedEndpoint"));
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}
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};
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} // namespace IPC
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namespace mozilla::ipc {
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template <>
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struct IPDLParamTraits<FileDescriptor> {
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typedef FileDescriptor paramType;
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static void Write(IPC::Message* aMsg, IProtocol* aActor,
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const paramType& aParam);
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static bool Read(const IPC::Message* aMsg, PickleIterator* aIter,
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IProtocol* aActor, paramType* aResult);
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};
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} // namespace mozilla::ipc
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#endif // IPC_GLUE_PROTOCOLMESSAGEUTILS_H
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