service_discovery_shared_client.cc revision 68043e1e95eeb07d5cae7aca370b26518b0867d6 
1// Copyright 2013 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 "chrome/browser/local_discovery/service_discovery_shared_client.h"
6
7#include "content/public/browser/browser_thread.h"
8
9#if defined(OS_MACOSX)
10#include "chrome/browser/local_discovery/service_discovery_client_mac_factory.h"
11#endif
12
13#if defined(ENABLE_MDNS)
14#include "chrome/browser/local_discovery/service_discovery_client_mdns.h"
15#endif  // ENABLE_MDNS
16
17namespace local_discovery {
18
19using content::BrowserThread;
20
21namespace {
22ServiceDiscoverySharedClient* g_service_discovery_client = NULL;
23}  // namespace
24
25ServiceDiscoverySharedClient::ServiceDiscoverySharedClient() {
26  DCHECK(!g_service_discovery_client);
27  g_service_discovery_client = this;
28}
29
30ServiceDiscoverySharedClient::~ServiceDiscoverySharedClient() {
31  DCHECK_EQ(g_service_discovery_client, this);
32  g_service_discovery_client = NULL;
33}
34
35#if defined(ENABLE_MDNS) || defined(OS_MACOSX)
36
37scoped_refptr<ServiceDiscoverySharedClient>
38    ServiceDiscoverySharedClient::GetInstance() {
39  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
40
41  if (g_service_discovery_client)
42    return g_service_discovery_client;
43
44#if defined(OS_MACOSX)
45  return ServiceDiscoveryClientMacFactory::CreateInstance();
46#else
47  return new ServiceDiscoveryClientMdns();
48#endif
49}
50
51#else
52
53scoped_refptr<ServiceDiscoverySharedClient>
54    ServiceDiscoverySharedClient::GetInstance() {
55  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
56  NOTIMPLEMENTED();
57  return NULL;
58}
59
60#endif  // ENABLE_MDNS
61
62}  // namespace local_discovery
63