mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 07:06:11 -04:00
Alexey Polyudov
b724d792dd
Signed-off-by: Alexey Polyudov <apolyudov@google.com> Change-Id: I9a7d3c3d9790dc58c0d4c2bd2134499337b9a17b
121 lines
3.2 KiB
C++
121 lines
3.2 KiB
C++
// Copyright 2020 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 "core/internal/mediums/bluetooth_radio.h"
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#include "platform/base/exception.h"
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#include "platform/public/logging.h"
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#include "platform/public/system_clock.h"
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namespace location {
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namespace nearby {
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namespace connections {
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constexpr absl::Duration BluetoothRadio::kPauseBetweenToggle;
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BluetoothRadio::BluetoothRadio() {
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if (!IsAdapterValid()) {
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NEARBY_LOG(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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// We never enabled Bluetooth, nothing to do.
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if (!ever_saved_state_.Get()) {
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NEARBY_LOG(INFO, "BT adapter was not used. Not touching HW.");
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return;
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}
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// Toggle Bluetooth regardless of our original state. Some devices/chips can
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// start to freak out after some time (e.g. b/37775337), and this helps to
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// ensure BT resets properly.
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NEARBY_LOG(INFO, "Toggle BT adapter state before releasing adapter.");
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Toggle();
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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_LOG(INFO, "Failed to restore BT adapter original state.");
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}
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}
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bool BluetoothRadio::Enable() {
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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::Toggle() {
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if (!SaveOriginalState()) {
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return false;
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}
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if (!SetBluetoothState(false)) {
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NEARBY_LOG(INFO, "BT Toggle: Failed to turn BT off.");
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return false;
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}
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if (SystemClock::Sleep(kPauseBetweenToggle).Raised(Exception::kInterrupted)) {
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NEARBY_LOG(INFO, "BT Toggle: interrupted before turing on.");
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return false;
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}
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if (!SetBluetoothState(true)) {
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NEARBY_LOG(INFO, "BT Toggle: Failed to turn BT on.");
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return false;
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}
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return 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 connections
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} // namespace nearby
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} // namespace location
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