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nearby/internal/platform/implementation/linux/bluetooth_devices.cc
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// Copyright 2023 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 <chrono>
#include <functional>
#include <optional>
#include <absl/time/clock.h>
#include <sdbus-c++/Types.h>
#include "absl/synchronization/mutex.h"
#include "internal/platform/implementation/linux/bluetooth_classic_device.h"
#include "internal/platform/implementation/linux/bluetooth_devices.h"
#include "internal/platform/implementation/linux/bluez.h"
#include "internal/platform/logging.h"
namespace nearby {
namespace linux {
static constexpr std::chrono::minutes kLostPeripheralsCleanupMinFreq(5);
std::shared_ptr<BluetoothDevice> BluetoothDevices::get_device_by_path(
const sdbus::ObjectPath &device_object_path) {
absl::ReaderMutexLock l(&devices_by_path_lock_);
if (devices_by_path_.count(device_object_path) == 0) {
return nullptr;
}
return devices_by_path_[device_object_path];
}
std::shared_ptr<BluetoothDevice> BluetoothDevices::get_device_by_address(
const std::string &addr) {
auto device_object_path =
bluez::device_object_path(adapter_object_path_, addr);
return get_device_by_path(device_object_path);
}
void BluetoothDevices::remove_device_by_path(
const sdbus::ObjectPath &device_object_path) {
absl::MutexLock l(&devices_by_path_lock_);
devices_by_path_.erase(device_object_path);
}
void BluetoothDevices::mark_peripheral_lost(
const sdbus::ObjectPath &device_object_path) {
absl::ReaderMutexLock lock(&devices_by_path_lock_);
if (devices_by_path_.count(device_object_path) == 0) {
NEARBY_LOGS(ERROR) << __func__ << ": Device " << device_object_path
<< " doesn't exist";
}
devices_by_path_[device_object_path]->MarkLost();
}
void BluetoothDevices::cleanup_lost_peripherals() {
auto now = std::chrono::steady_clock::now();
absl::MutexLock lock(&devices_by_path_lock_);
if ((now - last_cleanup_) < kLostPeripheralsCleanupMinFreq) {
return;
}
last_cleanup_ = now;
for (auto it = devices_by_path_.begin(), end = devices_by_path_.end();
it != end;) {
auto copy = it++;
if (copy->second->Lost()) devices_by_path_.erase(copy);
}
}
std::shared_ptr<MonitoredBluetoothDevice> BluetoothDevices::add_new_device(
sdbus::ObjectPath device_object_path) {
absl::MutexLock l(&devices_by_path_lock_);
auto [device_it, inserted] = devices_by_path_.emplace(
std::string(device_object_path),
std::make_shared<MonitoredBluetoothDevice>(
system_bus_, std::move(device_object_path), observers_));
if (!inserted) device_it->second->UnmarkLost();
return device_it->second;
}
} // namespace linux
} // namespace nearby