net/url_request/url_request_context_getter.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 "net/url_request/url_request_context_getter.h"
   6
   7 #include "base/location.h"
   8 #include "base/single_thread_task_runner.h"
   9 #include "net/url_request/url_request_context.h"
  10 #include "net/url_request/url_request_context_getter_observer.h"
  11
  12 namespace net {
  13
  14 void URLRequestContextGetter::AddObserver(
  15     URLRequestContextGetterObserver* observer) {
  16   DCHECK(GetNetworkTaskRunner()->BelongsToCurrentThread());
  17   observer_list_.AddObserver(observer);
  18 }
  19
  20 void URLRequestContextGetter::RemoveObserver(
  21     URLRequestContextGetterObserver* observer) {
  22   DCHECK(GetNetworkTaskRunner()->BelongsToCurrentThread());
  23   observer_list_.RemoveObserver(observer);
  24 }
  25
  26 URLRequestContextGetter::URLRequestContextGetter() {}
  27
  28 URLRequestContextGetter::~URLRequestContextGetter() {}
  29
  30 void URLRequestContextGetter::OnDestruct() const {
  31   scoped_refptr<base::SingleThreadTaskRunner> network_task_runner =
  32       GetNetworkTaskRunner();
  33   DCHECK(network_task_runner.get());
  34   if (network_task_runner.get()) {
  35     if (network_task_runner->BelongsToCurrentThread()) {
  36       delete this;
  37     } else {
  38       if (!network_task_runner->DeleteSoon(FROM_HERE, this)) {
  39         // Can't force-delete the object here, because some derived classes
  40         // can only be deleted on the owning thread, so just emit a warning to
  41         // aid in debugging.
  42         DLOG(WARNING) << "URLRequestContextGetter leaking due to no owning"
  43                       << " thread.";
  44       }
  45     }
  46   }
  47   // If no IO message loop proxy was available, we will just leak memory.
  48   // This is also true if the IO thread is gone.
  49 }
  50
  51 void URLRequestContextGetter::NotifyContextShuttingDown() {
  52   DCHECK(GetNetworkTaskRunner()->BelongsToCurrentThread());
  53
  54   // Once shutdown starts, this must always return NULL.
  55   DCHECK(!GetURLRequestContext());
  56
  57   FOR_EACH_OBSERVER(URLRequestContextGetterObserver, observer_list_,
  58                     OnContextShuttingDown());
  59 }
  60
  61 TrivialURLRequestContextGetter::TrivialURLRequestContextGetter(
  62     URLRequestContext* context,
  63     const scoped_refptr<base::SingleThreadTaskRunner>& main_task_runner)
  64     : context_(context), main_task_runner_(main_task_runner) {
  65 }
  66
  67 TrivialURLRequestContextGetter::~TrivialURLRequestContextGetter() {}
  68
  69 URLRequestContext* TrivialURLRequestContextGetter::GetURLRequestContext() {
  70   return context_;
  71 }
  72
  73 scoped_refptr<base::SingleThreadTaskRunner>
  74 TrivialURLRequestContextGetter::GetNetworkTaskRunner() const {
  75   return main_task_runner_;
  76 }
  77
  78
  79 }  // namespace net