content/child/service_worker/service_worker_network_provider.cc

   1 // Copyright 2014 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/child/service_worker/service_worker_network_provider.h"
   6
   7 #include "base/atomic_sequence_num.h"
   8 #include "content/child/child_thread.h"
   9 #include "content/common/service_worker/service_worker_messages.h"
  10
  11 namespace content {
  12
  13 namespace {
  14
  15 const char kUserDataKey[] = "SWProviderKey";
  16
  17 // Must be unique in the child process.
  18 int GetNextProviderId() {
  19   static base::StaticAtomicSequenceNumber sequence;
  20   return sequence.GetNext();  // We start at zero.
  21 }
  22
  23 }  // namespace
  24
  25 void ServiceWorkerNetworkProvider::AttachToDocumentState(
  26     base::SupportsUserData* datasource_userdata,
  27     scoped_ptr<ServiceWorkerNetworkProvider> network_provider) {
  28   datasource_userdata->SetUserData(&kUserDataKey, network_provider.release());
  29 }
  30
  31 ServiceWorkerNetworkProvider* ServiceWorkerNetworkProvider::FromDocumentState(
  32     base::SupportsUserData* datasource_userdata) {
  33   return static_cast<ServiceWorkerNetworkProvider*>(
  34       datasource_userdata->GetUserData(&kUserDataKey));
  35 }
  36
  37 ServiceWorkerNetworkProvider::ServiceWorkerNetworkProvider()
  38     : provider_id_(GetNextProviderId()) {
  39   if (!ChildThread::current())
  40     return;  // May be null in some tests.
  41   ChildThread::current()->Send(
  42       new ServiceWorkerHostMsg_ProviderCreated(provider_id_));
  43 }
  44
  45 ServiceWorkerNetworkProvider::~ServiceWorkerNetworkProvider() {
  46   if (!ChildThread::current())
  47     return;  // May be null in some tests.
  48   ChildThread::current()->Send(
  49       new ServiceWorkerHostMsg_ProviderDestroyed(provider_id_));
  50 }
  51
  52 }  // namespace content