mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 15:16:12 -04:00
86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
// Copyright 2020 Google LLC
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include "connections/implementation/mediums/bluetooth_radio.h"
|
|
|
|
#include "internal/platform/logging.h"
|
|
|
|
namespace nearby {
|
|
namespace connections {
|
|
|
|
BluetoothRadio::BluetoothRadio() {
|
|
if (!IsAdapterValid()) {
|
|
LOG(ERROR) << "Bluetooth adapter is not valid: BT is not supported";
|
|
}
|
|
}
|
|
|
|
BluetoothRadio::~BluetoothRadio() {
|
|
// We never enabled Bluetooth, nothing to do.
|
|
if (!ever_saved_state_.Get()) {
|
|
LOG(INFO) << "BT adapter was not used. Not touching HW.";
|
|
return;
|
|
}
|
|
|
|
LOG(INFO) << "Bring BT adapter to original state";
|
|
if (!SetBluetoothState(originally_enabled_.Get())) {
|
|
LOG(INFO) << "Failed to restore BT adapter original state.";
|
|
}
|
|
}
|
|
|
|
bool BluetoothRadio::Enable() {
|
|
if (!SaveOriginalState()) {
|
|
return false;
|
|
}
|
|
|
|
return SetBluetoothState(true);
|
|
}
|
|
|
|
bool BluetoothRadio::Disable() {
|
|
if (!SaveOriginalState()) {
|
|
return false;
|
|
}
|
|
|
|
return SetBluetoothState(false);
|
|
}
|
|
|
|
bool BluetoothRadio::IsEnabled() const {
|
|
return IsAdapterValid() && IsInDesiredState(true);
|
|
}
|
|
|
|
bool BluetoothRadio::SetBluetoothState(bool enable) {
|
|
return bluetooth_adapter_.SetStatus(
|
|
enable ? BluetoothAdapter::Status::kEnabled
|
|
: BluetoothAdapter::Status::kDisabled);
|
|
}
|
|
|
|
bool BluetoothRadio::IsInDesiredState(bool should_be_enabled) const {
|
|
return bluetooth_adapter_.IsEnabled() == should_be_enabled;
|
|
}
|
|
|
|
bool BluetoothRadio::SaveOriginalState() {
|
|
if (!IsAdapterValid()) {
|
|
return false;
|
|
}
|
|
|
|
// If we haven't saved the original state of the radio, save it.
|
|
if (!ever_saved_state_.Set(true)) {
|
|
originally_enabled_.Set(bluetooth_adapter_.IsEnabled());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace connections
|
|
} // namespace nearby
|