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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/local_discovery/service_discovery_shared_client.h"
#include <memory>
#include "build/build_config.h"
#include "net/net_buildflags.h"
#if BUILDFLAG(IS_MAC)
#include "chrome/browser/local_discovery/service_discovery_client_mac_factory.h"
#endif
#if BUILDFLAG(ENABLE_MDNS)
#include "base/memory/ref_counted.h"
#include "chrome/browser/local_discovery/service_discovery_client_mdns.h"
#endif
namespace local_discovery {
using content::BrowserThread;
namespace {
ServiceDiscoverySharedClient* g_service_discovery_client = nullptr;
} // namespace
ServiceDiscoverySharedClient::ServiceDiscoverySharedClient() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(!g_service_discovery_client);
g_service_discovery_client = this;
}
ServiceDiscoverySharedClient::~ServiceDiscoverySharedClient() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK_EQ(g_service_discovery_client, this);
g_service_discovery_client = nullptr;
}
// static
scoped_refptr<ServiceDiscoverySharedClient>
ServiceDiscoverySharedClient::GetInstance() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
#if BUILDFLAG(ENABLE_MDNS) || BUILDFLAG(IS_MAC)
if (g_service_discovery_client)
return g_service_discovery_client;
#if BUILDFLAG(IS_MAC)
return ServiceDiscoveryClientMacFactory::CreateInstance();
#else
return base::MakeRefCounted<ServiceDiscoveryClientMdns>();
#endif // BUILDFLAG(IS_MAC)
#else
NOTIMPLEMENTED();
return nullptr;
#endif // BUILDFLAG(ENABLE_MDNS) || BUILDFLAG(IS_MAC)
}
} // namespace local_discovery
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