ipc/glue/Transport_posix.cpp
author Thinker Lee <tlee@mozilla.com>, Cervantes Yu <cyu@mozilla.com>
Fri, 31 May 2013 21:16:54 +0800
changeset 157953 a3f41e00dc182c3155f8a7b8bd8828ce7ebba979
parent 103959 b5c4b792f3f2a047e3517472d72842a76afb77cd
child 157955 21edfc4062023e746a017ae6ef5dcd8c0e85f912
permissions -rw-r--r--
Bug 771765 - Support template content process, part 2: IPC and glue changes. r=bent Changes include: * Getting/resetting platform thread ID. * Creating an IPC channel with existing file descriptor sent from the template process. * Child process host with existing process forked from the template.

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
 */
/* 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 <unistd.h>

#include <string>

#include "chrome/common/child_process_info.h"

#include "mozilla/ipc/Transport.h"

using namespace base;
using namespace std;

namespace mozilla {
namespace ipc {

bool
CreateTransport(ProcessHandle /*unused*/, ProcessHandle /*unused*/,
                TransportDescriptor* aOne, TransportDescriptor* aTwo)
{
  // Gecko doesn't care about this random ID, and the argument to this
  // function isn't really necessary, it can be just any random
  // pointer value
  wstring id = ChildProcessInfo::GenerateRandomChannelID(aOne);
  // Use MODE_SERVER to force creation of the socketpair
  Transport t(id, Transport::MODE_SERVER, nullptr);
  int fd1 = t.GetFileDescriptor();
  int fd2, dontcare;
  t.GetClientFileDescriptorMapping(&fd2, &dontcare);
  if (fd1 < 0 || fd2 < 0) {
    return false;
  }

  // The Transport closes these fds when it goes out of scope, so we
  // dup them here
  fd1 = dup(fd1);
  fd2 = dup(fd2);
  if (fd1 < 0 || fd2 < 0) {
    return false;
  }

  aOne->mFd = FileDescriptor(fd1, true/*close after sending*/);
  aTwo->mFd = FileDescriptor(fd2, true/*close after sending*/);
  return true;
}

Transport*
OpenDescriptor(const TransportDescriptor& aTd, Transport::Mode aMode)
{
  return new Transport(aTd.mFd.fd, aMode, nullptr);
}

void
CloseDescriptor(const TransportDescriptor& aTd)
{
  close(aTd.mFd.fd);
}

} // namespace ipc
} // namespace mozilla