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- // Copyright 2020 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "ash/public/cpp/screen_backlight.h"
- #include "base/check_op.h"
- namespace ash {
- namespace {
- ScreenBacklight* g_instance = nullptr;
- }
- template <>
- ScreenBacklight*&
- ScreenBacklight::ScopedResetterForTest::GetGlobalInstanceHolder() {
- return g_instance;
- }
- // static
- ScreenBacklight* ScreenBacklight::Get() {
- return g_instance;
- }
- ScreenBacklight::ScreenBacklight() {
- DCHECK_EQ(nullptr, g_instance);
- g_instance = this;
- }
- ScreenBacklight::~ScreenBacklight() {
- DCHECK_EQ(this, g_instance);
- g_instance = nullptr;
- }
- } // namespace ash
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