athena/screen_lock/screen_lock_manager_base.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 "athena/screen_lock/screen_lock_manager_base.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace athena {
  10 namespace {
  11
  12 ScreenLockManager* instance = nullptr;
  13
  14 }  // namespace
  15
  16 ScreenLockManagerBase::ScreenLockManagerBase() {
  17   DCHECK(!instance);
  18   instance = this;
  19 }
  20
  21 ScreenLockManagerBase::~ScreenLockManagerBase() {
  22   DCHECK_EQ(instance, this);
  23   instance = nullptr;
  24 }
  25
  26 // static
  27 ScreenLockManager* ScreenLockManager::Get() {
  28   return instance;
  29 }
  30
  31 // static
  32 void ScreenLockManager::Shutdown() {
  33   if (instance) {
  34     delete instance;
  35     DCHECK(!instance);
  36   }
  37 }
  38
  39 }  // namespace athena