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
101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
// Copyright 2022 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/scanning/scanner_broker_impl.h"
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#include <memory>
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#include <utility>
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#include "absl/functional/bind_front.h"
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#include "fastpair/common/fast_pair_device.h"
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#include "fastpair/scanning/fastpair/fast_pair_discoverable_scanner_impl.h"
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#include "fastpair/scanning/fastpair/fast_pair_scanner_impl.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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namespace {
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class ScanningSessionImpl : public ScannerBroker::ScanningSession {
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public:
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ScanningSessionImpl(ScannerBrokerImpl* scanner, Protocol protocol)
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: scanner_(scanner), protocol_(protocol) {}
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~ScanningSessionImpl() override { scanner_->StopScanning(protocol_); }
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private:
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ScannerBrokerImpl* scanner_;
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Protocol protocol_;
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};
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} // namespace
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ScannerBrokerImpl::ScannerBrokerImpl(
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Mediums& mediums, SingleThreadExecutor* executor,
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FastPairDeviceRepository* device_repository)
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: mediums_(mediums),
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executor_(executor),
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device_repository_(device_repository) {}
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void ScannerBrokerImpl::AddObserver(Observer* observer) {
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observers_.AddObserver(observer);
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}
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void ScannerBrokerImpl::RemoveObserver(Observer* observer) {
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observers_.RemoveObserver(observer);
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}
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std::unique_ptr<ScannerBroker::ScanningSession>
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ScannerBrokerImpl::StartScanning(Protocol protocol) {
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DCHECK(!fast_pair_discoverable_scanner_);
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NEARBY_LOGS(VERBOSE) << "Starting Fast Pair Scanning.";
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scanner_ = std::make_unique<FastPairScannerImpl>(mediums_, executor_);
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fast_pair_discoverable_scanner_ =
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FastPairDiscoverableScannerImpl::Factory::Create(
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*scanner_,
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absl::bind_front(&ScannerBrokerImpl::NotifyDeviceFound, this),
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absl::bind_front(&ScannerBrokerImpl::NotifyDeviceLost, this),
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executor_, device_repository_);
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scanning_session_ = scanner_->StartScanning();
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return std::make_unique<ScanningSessionImpl>(this, protocol);
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}
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void ScannerBrokerImpl::StopScanning(Protocol protocol) {
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NEARBY_LOGS(VERBOSE) << __func__ << " Stopping Fast Pair Scanning.";
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scanning_session_.reset();
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observers_.Clear();
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DestroyOnExecutor(std::move(fast_pair_discoverable_scanner_), executor_);
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DestroyOnExecutor(std::move(scanner_), executor_);
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}
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void ScannerBrokerImpl::NotifyDeviceFound(FastPairDevice& device) {
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NEARBY_LOGS(INFO) << __func__ << ": Notifying device found, model id = "
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<< device.GetModelId();
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for (auto& observer : observers_.GetObservers()) {
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observer->OnDeviceFound(device);
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}
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}
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void ScannerBrokerImpl::NotifyDeviceLost(FastPairDevice& device) {
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NEARBY_LOGS(INFO) << __func__ << ": Notifying device lost, model id = "
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<< device.GetModelId();
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for (auto& observer : observers_.GetObservers()) {
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observer->OnDeviceLost(device);
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}
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}
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} // namespace fastpair
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} // namespace nearby
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