mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-16 15:36:12 -04:00
Janusz Sobczak
d559a4a435
Improve clean up order to prevent use-after-free errors. PiperOrigin-RevId: 547313964
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
// Copyright 2023 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "fastpair/internal/mediums/bluetooth_radio.h"
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#include "internal/platform/logging.h"
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namespace nearby {
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namespace fastpair {
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BluetoothRadio::BluetoothRadio() {
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if (!IsAdapterValid()) {
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NEARBY_LOGS(ERROR) << "Bluetooth adapter is not valid: BT is not supported";
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}
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}
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BluetoothRadio::~BluetoothRadio() {
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NEARBY_LOGS(VERBOSE) << "~BluetoothRadio start";
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// We never enabled Bluetooth, nothing to do.
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if (!ever_saved_state_.Get()) {
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NEARBY_LOGS(INFO) << "BT adapter was not used. Not touching HW.";
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return;
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}
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NEARBY_LOG(INFO, "Bring BT adapter to original state");
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if (!SetBluetoothState(originally_enabled_.Get())) {
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NEARBY_LOGS(INFO) << "Failed to restore BT adapter original state.";
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}
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NEARBY_LOGS(VERBOSE) << "~BluetoothRadio done";
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}
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bool BluetoothRadio::Enable() {
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NEARBY_LOGS(INFO) << __func__;
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if (!SaveOriginalState()) {
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return false;
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}
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return SetBluetoothState(true);
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}
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bool BluetoothRadio::Disable() {
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if (!SaveOriginalState()) {
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return false;
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}
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return SetBluetoothState(false);
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}
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bool BluetoothRadio::IsEnabled() const {
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return IsAdapterValid() && IsInDesiredState(true);
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}
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bool BluetoothRadio::SetBluetoothState(bool enable) {
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return bluetooth_adapter_.SetStatus(
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enable ? BluetoothAdapter::Status::kEnabled
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: BluetoothAdapter::Status::kDisabled);
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}
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bool BluetoothRadio::IsInDesiredState(bool should_be_enabled) const {
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return bluetooth_adapter_.IsEnabled() == should_be_enabled;
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}
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bool BluetoothRadio::SaveOriginalState() {
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if (!IsAdapterValid()) {
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return false;
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}
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// If we haven't saved the original state of the radio, save it.
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if (!ever_saved_state_.Set(true)) {
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originally_enabled_.Set(bluetooth_adapter_.IsEnabled());
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}
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return true;
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}
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} // namespace fastpair
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} // namespace nearby
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