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      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/child/service_worker/service_worker_provider_context.h"
     10 #include "content/common/service_worker/service_worker_messages.h"
     11 
     12 namespace content {
     13 
     14 namespace {
     15 
     16 const char kUserDataKey[] = "SWProviderKey";
     17 
     18 // Must be unique in the child process.
     19 int GetNextProviderId() {
     20   static base::StaticAtomicSequenceNumber sequence;
     21   return sequence.GetNext();  // We start at zero.
     22 }
     23 
     24 }  // namespace
     25 
     26 void ServiceWorkerNetworkProvider::AttachToDocumentState(
     27     base::SupportsUserData* datasource_userdata,
     28     scoped_ptr<ServiceWorkerNetworkProvider> network_provider) {
     29   datasource_userdata->SetUserData(&kUserDataKey, network_provider.release());
     30 }
     31 
     32 ServiceWorkerNetworkProvider* ServiceWorkerNetworkProvider::FromDocumentState(
     33     base::SupportsUserData* datasource_userdata) {
     34   return static_cast<ServiceWorkerNetworkProvider*>(
     35       datasource_userdata->GetUserData(&kUserDataKey));
     36 }
     37 
     38 ServiceWorkerNetworkProvider::ServiceWorkerNetworkProvider()
     39     : provider_id_(GetNextProviderId()),
     40       context_(new ServiceWorkerProviderContext(provider_id_)) {
     41   if (!ChildThread::current())
     42     return;  // May be null in some tests.
     43   ChildThread::current()->Send(
     44       new ServiceWorkerHostMsg_ProviderCreated(provider_id_));
     45 }
     46 
     47 ServiceWorkerNetworkProvider::~ServiceWorkerNetworkProvider() {
     48   if (!ChildThread::current())
     49     return;  // May be null in some tests.
     50   ChildThread::current()->Send(
     51       new ServiceWorkerHostMsg_ProviderDestroyed(provider_id_));
     52 }
     53 
     54 void ServiceWorkerNetworkProvider::SetServiceWorkerVersionId(
     55     int64 version_id) {
     56   if (!ChildThread::current())
     57     return;  // May be null in some tests.
     58   ChildThread::current()->Send(
     59       new ServiceWorkerHostMsg_SetVersionId(provider_id_, version_id));
     60 }
     61 
     62 }  // namespace content
     63