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/* -*- 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 "mozilla/ipc/IOThread.h"
#include "mozilla/ipc/NodeController.h"
#include "mozilla/Preferences.h"
#if defined(XP_WIN)
# include <objbase.h>
#endif
#if defined(XP_WIN)
# include "chrome/common/ipc_channel_win.h"
#else
# if defined(XP_DARWIN)
# include "chrome/common/ipc_channel_mach.h"
# endif
# include "chrome/common/ipc_channel_posix.h"
#endif
namespace mozilla {
namespace ipc {
//
// IOThread
//
/* static */
IOThread* IOThread::sSingleton = nullptr;
IOThread::IOThread(const char* aName) : base::Thread(aName) {
sSingleton = this;
}
IOThread::~IOThread() {
MOZ_ASSERT(!IsRunning());
sSingleton = nullptr;
}
void IOThread::Startup() {
if (XRE_IsParentProcess()) {
// Destroyed in IOThread::Shutdown
auto* thread = new IOThreadParent();
MOZ_RELEASE_ASSERT(thread == sSingleton);
}
MOZ_ASSERT(sSingleton);
}
void IOThread::Shutdown() {
if (XRE_IsParentProcess()) {
delete static_cast<IOThreadParent*>(sSingleton);
MOZ_ASSERT(!sSingleton);
}
}
void IOThread::StartThread() {
// Failure to create the IPC I/O thread is unrecoverable.
// NOTE: This will block if successful for the `Init()` virtual method to have
// been run.
if (!StartWithOptions(
base::Thread::Options{MessageLoop::TYPE_IO, /* stack size */ 0})) {
MOZ_CRASH("Failed to create IPC I/O Thread");
}
}
void IOThread::StopThread() {
// This will block until CleanUp() has been called, and the IPC I/O thread has
// been joined.
Stop();
}
//
// IOThreadParent
//
IOThreadParent::IOThreadParent() : IOThread("IPC I/O Parent") {
MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
// Select which type of channel will be used for IPC.
mChannelKind = [] {
#if defined(XP_WIN)
return &IPC::ChannelWin::sKind;
#else
# if defined(XP_DARWIN)
if (Preferences::GetBool("dom.ipc.backend.mach")) {
return &IPC::ChannelMach::sKind;
}
# endif
return &IPC::ChannelPosix::sKind;
#endif
}();
StartThread();
}
IOThreadParent::~IOThreadParent() { StopThread(); }
void IOThreadParent::Init() {
#if defined(XP_WIN)
// Initializes the COM library on the current thread.
CoInitialize(nullptr);
#endif
// Initialize the ports library in the current thread.
NodeController::InitBrokerProcess(mChannelKind);
}
void IOThreadParent::CleanUp() {
NodeController::CleanUp();
#if defined(XP_WIN)
// Closes the COM library on the current thread. CoInitialize must
// be balanced by a corresponding call to CoUninitialize.
CoUninitialize();
#endif
}
//
// IOThreadChild
//
IOThreadChild::IOThreadChild(IPC::Channel::ChannelHandle aClientHandle,
base::ProcessId aParentPid)
: IOThread("IPC I/O Child"),
mClientHandle(std::move(aClientHandle)),
mParentPid(std::move(aParentPid)) {
StartThread();
}
IOThreadChild::~IOThreadChild() { StopThread(); }
void IOThreadChild::Init() {
mInitialPort =
NodeController::InitChildProcess(std::move(mClientHandle), mParentPid);
}
void IOThreadChild::CleanUp() { NodeController::CleanUp(); }
} // namespace ipc
} // namespace mozilla
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