ipc/glue/Transport_win.cpp
author Ed Morley <bmo@edmorley.co.uk>
Thu, 06 Oct 2011 17:15:07 +0100
changeset 78250 ec4cb3b08fa1a11ed6c9de16ab0b21c2e660506e
parent 70536 d11b3f7ed46aa0ca0ba48afde08ab2e8a14a7c21
child 94846 f4157e8c410708d76703f19e4dfb61859bfe32d8
permissions -rw-r--r--
Bug 689884 - Skip Makefiles that are no-op or else only |DIRS = a_single_subdir|; r=khuey

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
 */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at:
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Code.
 *
 * The Initial Developer of the Original Code is
 *   The Mozilla Foundation
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Chris Jones <jones.chris.g@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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#include "base/message_loop.h"
#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 aProcOne, ProcessHandle /*unused*/,
                TransportDescriptor* aOne, TransportDescriptor* aTwo)
{
  // This id is used to name the IPC pipe.  The pointer passed to this
  // function isn't significant.
  wstring id = ChildProcessInfo::GenerateRandomChannelID(aOne);
  // Use MODE_SERVER to force creation of the pipe
  Transport t(id, Transport::MODE_SERVER, nsnull);
  HANDLE serverPipe = t.GetServerPipeHandle();
  if (!serverPipe) {
    return false;
  }

  // NB: we create the server pipe immediately, instead of just
  // grabbing an ID, on purpose.  In the current setup, the client
  // needs to connect to an existing server pipe, so to prevent race
  // conditions, we create the server side here and then dup it to the
  // eventual server process.
  HANDLE serverDup;
  DWORD access = 0;
  DWORD options = DUPLICATE_SAME_ACCESS;
  if (!DuplicateHandle(GetCurrentProcess(), serverPipe, aProcOne,
                       &serverDup,
                       access,
                       FALSE/*not inheritable*/,
                       options)) {
    return false;
  }

  aOne->mPipeName = aTwo->mPipeName = id;
  aOne->mServerPipe = serverDup;
  aTwo->mServerPipe = 0;
  return true;
}

Transport*
OpenDescriptor(const TransportDescriptor& aTd, Transport::Mode aMode)
{
  return new Transport(aTd.mPipeName, aTd.mServerPipe, aMode, nsnull);
}

void
CloseDescriptor(const TransportDescriptor& aTd)
{
  CloseHandle(aTd.mServerPipe);
}

} // namespace ipc
} // namespace mozilla