abcf78fe90
Use the top level clang-format setup by the HIDL team to format the entire implementation. clang-format -i --style file wifi/1.2/default/* Bug: 32287573 Test: Compiles Change-Id: I336c21fd9bfdc560117aa7212f92ab5f01df4b8e
124 lines
3.8 KiB
C++
124 lines
3.8 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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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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* http://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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*/
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#ifndef HIDL_CALLBACK_UTIL_H_
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#define HIDL_CALLBACK_UTIL_H_
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#include <set>
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#include <hidl/HidlSupport.h>
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namespace {
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// Type of callback invoked by the death handler.
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using on_death_cb_function = std::function<void(uint64_t)>;
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// Private class used to keep track of death of individual
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// callbacks stored in HidlCallbackHandler.
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template <typename CallbackType>
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class HidlDeathHandler : public android::hardware::hidl_death_recipient {
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public:
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HidlDeathHandler(const on_death_cb_function& user_cb_function)
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: cb_function_(user_cb_function) {}
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~HidlDeathHandler() = default;
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// Death notification for callbacks.
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void serviceDied(
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uint64_t cookie,
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const android::wp<android::hidl::base::V1_0::IBase>& /* who */)
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override {
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cb_function_(cookie);
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}
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private:
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on_death_cb_function cb_function_;
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DISALLOW_COPY_AND_ASSIGN(HidlDeathHandler);
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};
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} // namespace
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namespace android {
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namespace hardware {
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namespace wifi {
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namespace V1_2 {
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namespace implementation {
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namespace hidl_callback_util {
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template <typename CallbackType>
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// Provides a class to manage callbacks for the various HIDL interfaces and
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// handle the death of the process hosting each callback.
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class HidlCallbackHandler {
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public:
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HidlCallbackHandler()
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: death_handler_(new HidlDeathHandler<CallbackType>(
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std::bind(&HidlCallbackHandler::onObjectDeath, this,
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std::placeholders::_1))) {}
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~HidlCallbackHandler() = default;
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bool addCallback(const sp<CallbackType>& cb) {
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// TODO(b/33818800): Can't compare proxies yet. So, use the cookie
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// (callback proxy's raw pointer) to track the death of individual
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// clients.
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uint64_t cookie = reinterpret_cast<uint64_t>(cb.get());
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if (cb_set_.find(cb) != cb_set_.end()) {
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LOG(WARNING) << "Duplicate death notification registration";
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return true;
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}
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if (!cb->linkToDeath(death_handler_, cookie)) {
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LOG(ERROR) << "Failed to register death notification";
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return false;
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}
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cb_set_.insert(cb);
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return true;
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}
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const std::set<android::sp<CallbackType>>& getCallbacks() {
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return cb_set_;
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}
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// Death notification for callbacks.
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void onObjectDeath(uint64_t cookie) {
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CallbackType* cb = reinterpret_cast<CallbackType*>(cookie);
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const auto& iter = cb_set_.find(cb);
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if (iter == cb_set_.end()) {
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LOG(ERROR) << "Unknown callback death notification received";
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return;
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}
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cb_set_.erase(iter);
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LOG(DEBUG) << "Dead callback removed from list";
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}
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void invalidate() {
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for (const sp<CallbackType>& cb : cb_set_) {
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if (!cb->unlinkToDeath(death_handler_)) {
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LOG(ERROR) << "Failed to deregister death notification";
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}
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}
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cb_set_.clear();
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}
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private:
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std::set<sp<CallbackType>> cb_set_;
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sp<HidlDeathHandler<CallbackType>> death_handler_;
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DISALLOW_COPY_AND_ASSIGN(HidlCallbackHandler);
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};
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} // namespace hidl_callback_util
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} // namespace implementation
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} // namespace V1_2
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} // namespace wifi
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} // namespace hardware
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} // namespace android
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#endif // HIDL_CALLBACK_UTIL_H_
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