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 "base/trace_event/memory_dump_manager.h"
  10 #include "build/build_config.h"
  11 #include "content/browser/browser_child_process_host_impl.h"
  12 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
  13 #include "content/browser/notification_service_impl.h"
  14 #include "net/url_request/url_fetcher.h"
  15 #include "net/url_request/url_request.h"
  16
  17 #if defined(OS_WIN)
  18 #include "base/win/scoped_com_initializer.h"
  19 #endif
  20
  21 namespace content {
  22
  23 BrowserProcessSubThread::BrowserProcessSubThread(BrowserThread::ID identifier)
  24     : BrowserThreadImpl(identifier) {
  25 }
  26
  27 BrowserProcessSubThread::~BrowserProcessSubThread() {
  28   Stop();
  29 }
  30
  31 void BrowserProcessSubThread::Init() {
  32 #if defined(OS_WIN)
  33   com_initializer_.reset(new base::win::ScopedCOMInitializer());
  34 #endif
  35
  36   notification_service_.reset(new NotificationServiceImpl());
  37
  38   BrowserThreadImpl::Init();
  39
  40   if (BrowserThread::CurrentlyOn(BrowserThread::IO)) {
  41     // Though this thread is called the "IO" thread, it actually just routes
  42     // messages around; it shouldn't be allowed to perform any blocking disk
  43     // I/O.
  44     base::ThreadRestrictions::SetIOAllowed(false);
  45     base::ThreadRestrictions::DisallowWaiting();
  46   }
  47 }
  48
  49 void BrowserProcessSubThread::CleanUp() {
  50   if (BrowserThread::CurrentlyOn(BrowserThread::IO))
  51     IOThreadPreCleanUp();
  52
  53   BrowserThreadImpl::CleanUp();
  54
  55   notification_service_.reset();
  56
  57 #if defined(OS_WIN)
  58   com_initializer_.reset();
  59 #endif
  60 }
  61
  62 void BrowserProcessSubThread::IOThreadPreCleanUp() {
  63   // Kill all things that might be holding onto
  64   // net::URLRequest/net::URLRequestContexts.
  65
  66   // Destroy all URLRequests started by URLFetchers.
  67   net::URLFetcher::CancelAll();
  68
  69 #if !defined(OS_IOS)
  70   // If any child processes are still running, terminate them and
  71   // and delete the BrowserChildProcessHost instances to release whatever
  72   // IO thread only resources they are referencing.
  73   BrowserChildProcessHostImpl::TerminateAll();
  74 #endif  // !defined(OS_IOS)
  75
  76   // Unregister GpuMemoryBuffer dump provider before IO thread is shut down.
  77   base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
  78       BrowserGpuMemoryBufferManager::current());
  79 }
  80
  81 }  // namespace content