content/browser/browser_process_sub_thread.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/browser/browser_process_sub_thread.h"
   6
   7 #include "base/debug/leak_tracker.h"
   8 #include "base/threading/thread_restrictions.h"
   9 #include "build/build_config.h"
  10 #include "content/browser/browser_child_process_host_impl.h"
  11 #include "content/browser/notification_service_impl.h"
  12 #include "net/url_request/url_fetcher.h"
  13 #include "net/url_request/url_request.h"
  14
  15 #if defined(OS_WIN)
  16 #include "base/win/scoped_com_initializer.h"
  17 #endif
  18
  19 namespace content {
  20
  21 BrowserProcessSubThread::BrowserProcessSubThread(BrowserThread::ID identifier)
  22     : BrowserThreadImpl(identifier) {
  23 }
  24
  25 BrowserProcessSubThread::~BrowserProcessSubThread() {
  26   Stop();
  27 }
  28
  29 void BrowserProcessSubThread::Init() {
  30 #if defined(OS_WIN)
  31   com_initializer_.reset(new base::win::ScopedCOMInitializer());
  32 #endif
  33
  34   notification_service_.reset(new NotificationServiceImpl());
  35
  36   BrowserThreadImpl::Init();
  37
  38   if (BrowserThread::CurrentlyOn(BrowserThread::IO)) {
  39     // Though this thread is called the "IO" thread, it actually just routes
  40     // messages around; it shouldn't be allowed to perform any blocking disk
  41     // I/O.
  42     base::ThreadRestrictions::SetIOAllowed(false);
  43     base::ThreadRestrictions::DisallowWaiting();
  44   }
  45 }
  46
  47 void BrowserProcessSubThread::CleanUp() {
  48   if (BrowserThread::CurrentlyOn(BrowserThread::IO))
  49     IOThreadPreCleanUp();
  50
  51   BrowserThreadImpl::CleanUp();
  52
  53   notification_service_.reset();
  54
  55 #if defined(OS_WIN)
  56   com_initializer_.reset();
  57 #endif
  58 }
  59
  60 void BrowserProcessSubThread::IOThreadPreCleanUp() {
  61   // Kill all things that might be holding onto
  62   // net::URLRequest/net::URLRequestContexts.
  63
  64   // Destroy all URLRequests started by URLFetchers.
  65   net::URLFetcher::CancelAll();
  66
  67 #if !defined(OS_IOS)
  68   // If any child processes are still running, terminate them and
  69   // and delete the BrowserChildProcessHost instances to release whatever
  70   // IO thread only resources they are referencing.
  71   BrowserChildProcessHostImpl::TerminateAll();
  72 #endif  // !defined(OS_IOS)
  73 }
  74
  75 }  // namespace content