content/utility/utility_thread_impl.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/utility/utility_thread_impl.h"
   6
   7 #include <stddef.h>
   8
   9 #include "base/command_line.h"
  10 #include "base/memory/scoped_vector.h"
  11 #include "content/child/blink_platform_impl.h"
  12 #include "content/child/child_process.h"
  13 #include "content/common/child_process_messages.h"
  14 #include "content/common/utility_messages.h"
  15 #include "content/public/common/content_switches.h"
  16 #include "content/public/utility/content_utility_client.h"
  17 #include "ipc/ipc_sync_channel.h"
  18 #include "third_party/WebKit/public/web/WebKit.h"
  19
  20 #if defined(OS_POSIX) && defined(ENABLE_PLUGINS)
  21 #include "base/files/file_path.h"
  22 #include "content/common/plugin_list.h"
  23 #endif
  24
  25 namespace content {
  26
  27 namespace {
  28
  29 template<typename SRC, typename DEST>
  30 void ConvertVector(const SRC& src, DEST* dest) {
  31   dest->reserve(src.size());
  32   for (typename SRC::const_iterator i = src.begin(); i != src.end(); ++i)
  33     dest->push_back(typename DEST::value_type(*i));
  34 }
  35
  36 }  // namespace
  37
  38 UtilityThreadImpl::UtilityThreadImpl()
  39     : ChildThreadImpl(ChildThreadImpl::Options::Builder().Build()) {
  40   Init();
  41 }
  42
  43 UtilityThreadImpl::UtilityThreadImpl(const InProcessChildThreadParams& params)
  44     : ChildThreadImpl(ChildThreadImpl::Options::Builder()
  45                           .InBrowserProcess(params)
  46                           .Build()) {
  47   Init();
  48 }
  49
  50 UtilityThreadImpl::~UtilityThreadImpl() {
  51 }
  52
  53 void UtilityThreadImpl::Shutdown() {
  54   ChildThreadImpl::Shutdown();
  55
  56   if (!IsInBrowserProcess())
  57     blink::shutdown();
  58 }
  59
  60 void UtilityThreadImpl::ReleaseProcessIfNeeded() {
  61   if (batch_mode_)
  62     return;
  63
  64   if (IsInBrowserProcess()) {
  65     // Close the channel to cause UtilityProcessHostImpl to be deleted. We need
  66     // to take a different code path than the multi-process case because that
  67     // depends on the child process going away to close the channel, but that
  68     // can't happen when we're in single process mode.
  69     channel()->Close();
  70   } else {
  71     ChildProcess::current()->ReleaseProcess();
  72   }
  73 }
  74
  75 void UtilityThreadImpl::Init() {
  76   batch_mode_ = false;
  77   ChildProcess::current()->AddRefProcess();
  78   if (!IsInBrowserProcess()) {
  79     // We can only initialize WebKit on one thread, and in single process mode
  80     // we run the utility thread on separate thread. This means that if any code
  81     // needs WebKit initialized in the utility process, they need to have
  82     // another path to support single process mode.
  83     blink_platform_impl_.reset(new BlinkPlatformImpl);
  84     blink::initialize(blink_platform_impl_.get());
  85   }
  86   GetContentClient()->utility()->UtilityThreadStarted();
  87   GetContentClient()->utility()->RegisterMojoServices(service_registry());
  88 }
  89
  90 bool UtilityThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
  91   if (GetContentClient()->utility()->OnMessageReceived(msg))
  92     return true;
  93
  94   bool handled = true;
  95   IPC_BEGIN_MESSAGE_MAP(UtilityThreadImpl, msg)
  96     IPC_MESSAGE_HANDLER(UtilityMsg_BatchMode_Started, OnBatchModeStarted)
  97     IPC_MESSAGE_HANDLER(UtilityMsg_BatchMode_Finished, OnBatchModeFinished)
  98 #if defined(OS_POSIX) && defined(ENABLE_PLUGINS)
  99     IPC_MESSAGE_HANDLER(UtilityMsg_LoadPlugins, OnLoadPlugins)
 100 #endif
 101     IPC_MESSAGE_UNHANDLED(handled = false)
 102   IPC_END_MESSAGE_MAP()
 103   return handled;
 104 }
 105
 106 void UtilityThreadImpl::OnBatchModeStarted() {
 107   batch_mode_ = true;
 108 }
 109
 110 void UtilityThreadImpl::OnBatchModeFinished() {
 111   batch_mode_ = false;
 112   ReleaseProcessIfNeeded();
 113 }
 114
 115 #if defined(OS_POSIX) && defined(ENABLE_PLUGINS)
 116 void UtilityThreadImpl::OnLoadPlugins(
 117     const std::vector<base::FilePath>& plugin_paths) {
 118   PluginList* plugin_list = PluginList::Singleton();
 119
 120   std::vector<WebPluginInfo> plugins;
 121   // TODO(bauerb): If we restart loading plugins, we might mess up the logic in
 122   // PluginList::ShouldLoadPlugin due to missing the previously loaded plugins
 123   // in |plugin_groups|.
 124   for (size_t i = 0; i < plugin_paths.size(); ++i) {
 125     WebPluginInfo plugin;
 126     if (!plugin_list->LoadPluginIntoPluginList(
 127         plugin_paths[i], &plugins, &plugin))
 128       Send(new UtilityHostMsg_LoadPluginFailed(i, plugin_paths[i]));
 129     else
 130       Send(new UtilityHostMsg_LoadedPlugin(i, plugin));
 131   }
 132
 133   ReleaseProcessIfNeeded();
 134 }
 135 #endif
 136
 137 }  // namespace content