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/files/file_path.h"
  11 #include "base/memory/scoped_vector.h"
  12 #include "content/child/blink_platform_impl.h"
  13 #include "content/child/child_process.h"
  14 #include "content/common/child_process_messages.h"
  15 #include "content/common/plugin_list.h"
  16 #include "content/common/utility_messages.h"
  17 #include "content/public/common/content_switches.h"
  18 #include "content/public/utility/content_utility_client.h"
  19 #include "ipc/ipc_sync_channel.h"
  20 #include "third_party/WebKit/public/web/WebKit.h"
  21
  22 namespace content {
  23
  24 namespace {
  25
  26 template<typename SRC, typename DEST>
  27 void ConvertVector(const SRC& src, DEST* dest) {
  28   dest->reserve(src.size());
  29   for (typename SRC::const_iterator i = src.begin(); i != src.end(); ++i)
  30     dest->push_back(typename DEST::value_type(*i));
  31 }
  32
  33 }  // namespace
  34
  35 UtilityThreadImpl::UtilityThreadImpl() : single_process_(false) {
  36   Init();
  37 }
  38
  39 UtilityThreadImpl::UtilityThreadImpl(const std::string& channel_name)
  40     : ChildThread(channel_name),
  41       single_process_(true) {
  42   Init();
  43 }
  44
  45 UtilityThreadImpl::~UtilityThreadImpl() {
  46 }
  47
  48 void UtilityThreadImpl::Shutdown() {
  49   ChildThread::Shutdown();
  50
  51   if (!single_process_)
  52     blink::shutdown();
  53 }
  54
  55 bool UtilityThreadImpl::Send(IPC::Message* msg) {
  56   return ChildThread::Send(msg);
  57 }
  58
  59 void UtilityThreadImpl::ReleaseProcessIfNeeded() {
  60   if (batch_mode_)
  61     return;
  62
  63   if (single_process_) {
  64     // Close the channel to cause UtilityProcessHostImpl to be deleted. We need
  65     // to take a different code path than the multi-process case because that
  66     // depends on the child process going away to close the channel, but that
  67     // can't happen when we're in single process mode.
  68     channel()->Close();
  69   } else {
  70     ChildProcess::current()->ReleaseProcess();
  71   }
  72 }
  73
  74 #if defined(OS_WIN)
  75
  76 void UtilityThreadImpl::PreCacheFont(const LOGFONT& log_font) {
  77   Send(new ChildProcessHostMsg_PreCacheFont(log_font));
  78 }
  79
  80 void UtilityThreadImpl::ReleaseCachedFonts() {
  81   Send(new ChildProcessHostMsg_ReleaseCachedFonts());
  82 }
  83
  84 #endif  // OS_WIN
  85
  86 void UtilityThreadImpl::Init() {
  87   batch_mode_ = false;
  88   ChildProcess::current()->AddRefProcess();
  89   if (!single_process_) {
  90     // We can only initialize WebKit on one thread, and in single process mode
  91     // we run the utility thread on separate thread. This means that if any code
  92     // needs WebKit initialized in the utility process, they need to have
  93     // another path to support single process mode.
  94     webkit_platform_support_.reset(new BlinkPlatformImpl);
  95     blink::initialize(webkit_platform_support_.get());
  96   }
  97   GetContentClient()->utility()->UtilityThreadStarted();
  98 }
  99
 100 bool UtilityThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
 101   if (GetContentClient()->utility()->OnMessageReceived(msg))
 102     return true;
 103
 104   bool handled = true;
 105   IPC_BEGIN_MESSAGE_MAP(UtilityThreadImpl, msg)
 106     IPC_MESSAGE_HANDLER(UtilityMsg_BatchMode_Started, OnBatchModeStarted)
 107     IPC_MESSAGE_HANDLER(UtilityMsg_BatchMode_Finished, OnBatchModeFinished)
 108 #if defined(OS_POSIX)
 109     IPC_MESSAGE_HANDLER(UtilityMsg_LoadPlugins, OnLoadPlugins)
 110 #endif  // OS_POSIX
 111     IPC_MESSAGE_UNHANDLED(handled = false)
 112   IPC_END_MESSAGE_MAP()
 113   return handled;
 114 }
 115
 116 void UtilityThreadImpl::OnBatchModeStarted() {
 117   batch_mode_ = true;
 118 }
 119
 120 void UtilityThreadImpl::OnBatchModeFinished() {
 121   batch_mode_ = false;
 122   ReleaseProcessIfNeeded();
 123 }
 124
 125 #if defined(OS_POSIX)
 126 void UtilityThreadImpl::OnLoadPlugins(
 127     const std::vector<base::FilePath>& plugin_paths) {
 128   PluginList* plugin_list = PluginList::Singleton();
 129
 130   std::vector<WebPluginInfo> plugins;
 131   // TODO(bauerb): If we restart loading plug-ins, we might mess up the logic in
 132   // PluginList::ShouldLoadPlugin due to missing the previously loaded plug-ins
 133   // in |plugin_groups|.
 134   for (size_t i = 0; i < plugin_paths.size(); ++i) {
 135     WebPluginInfo plugin;
 136     if (!plugin_list->LoadPluginIntoPluginList(
 137         plugin_paths[i], &plugins, &plugin))
 138       Send(new UtilityHostMsg_LoadPluginFailed(i, plugin_paths[i]));
 139     else
 140       Send(new UtilityHostMsg_LoadedPlugin(i, plugin));
 141   }
 142
 143   ReleaseProcessIfNeeded();
 144 }
 145 #endif
 146
 147 }  // namespace content