1 // Copyright (c) 2010 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/base/android_network_library.h" 6 7 #include "base/lazy_instance.h" 8 #include "base/logging.h" 9 #include "base/synchronization/lock.h" 10 11 using base::Lock; 12 using base::AutoLock; 13 14 namespace net { 15 16 class LibHolder { 17 public: 18 LibHolder() : lib_(NULL) {} 19 ~LibHolder() { 20 Reset(); 21 } 22 void Register(AndroidNetworkLibrary* lib) { 23 AutoLock lock(lock_); 24 if (lib_) { 25 LOG(WARNING) << "Ignoring duplicate call " << lib; 26 delete lib; 27 return; 28 } 29 lib_ = lib; 30 } 31 void Reset() { 32 AutoLock lock(lock_); 33 delete lib_; 34 lib_ = NULL; 35 } 36 AndroidNetworkLibrary* GetLibrary() { 37 AutoLock lock(lock_); 38 return lib_; 39 } 40 41 private: 42 AndroidNetworkLibrary* lib_; 43 Lock lock_; 44 }; 45 46 base::LazyInstance<LibHolder> g_holder(base::LINKER_INITIALIZED); 47 48 // static 49 void AndroidNetworkLibrary::RegisterSharedInstance(AndroidNetworkLibrary* lib) { 50 g_holder.Get().Register(lib); 51 } 52 53 // static 54 void AndroidNetworkLibrary::UnregisterSharedInstance() { 55 g_holder.Get().Reset(); 56 } 57 58 // static 59 AndroidNetworkLibrary* AndroidNetworkLibrary::GetSharedInstance() { 60 return g_holder.Get().GetLibrary(); 61 } 62 63 AndroidNetworkLibrary::AndroidNetworkLibrary() { 64 } 65 66 AndroidNetworkLibrary::~AndroidNetworkLibrary() { 67 } 68 69 } // namespace net 70
