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 BrowserProcessSubThread(BrowserThread::ID identifier)21BrowserProcessSubThread::BrowserProcessSubThread(BrowserThread::ID identifier) 22 : BrowserThreadImpl(identifier) { 23 } 24 ~BrowserProcessSubThread()25BrowserProcessSubThread::~BrowserProcessSubThread() { 26 Stop(); 27 } 28 Init()29void 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 CleanUp()47void 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 IOThreadPreCleanUp()60void 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 76