/*
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* Copyright (C) 2018 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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#define LOG_TAG "power"
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#define ATRACE_TAG ATRACE_TAG_POWER
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#include <android-base/logging.h>
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#include <android/system/suspend/1.0/ISystemSuspend.h>
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#include <hardware_legacy/power.h>
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#include <utils/Trace.h>
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#include <mutex>
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#include <string>
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#include <thread>
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#include <unordered_map>
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using android::sp;
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using android::system::suspend::V1_0::ISystemSuspend;
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using android::system::suspend::V1_0::IWakeLock;
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using android::system::suspend::V1_0::WakeLockType;
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static std::mutex gLock;
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static std::unordered_map<std::string, sp<IWakeLock>> gWakeLockMap;
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static const sp<ISystemSuspend>& getSystemSuspendServiceOnce() {
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static sp<ISystemSuspend> suspendService = ISystemSuspend::getService();
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return suspendService;
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}
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int acquire_wake_lock(int, const char* id) {
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ATRACE_CALL();
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const auto& suspendService = getSystemSuspendServiceOnce();
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if (!suspendService) {
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return -1;
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}
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std::lock_guard<std::mutex> l{gLock};
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if (!gWakeLockMap[id]) {
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auto ret = suspendService->acquireWakeLock(WakeLockType::PARTIAL, id);
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// It's possible that during device shutdown SystemSuspend service has already exited. In
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// these situations HIDL calls to it will result in a DEAD_OBJECT transaction error. We
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// check for DEAD_OBJECT so that libpower clients can shutdown cleanly.
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if (ret.isDeadObject()) {
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return -1;
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} else {
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gWakeLockMap[id] = ret;
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}
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}
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return 0;
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}
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int release_wake_lock(const char* id) {
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ATRACE_CALL();
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std::lock_guard<std::mutex> l{gLock};
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if (gWakeLockMap[id]) {
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// Ignore errors on release() call since hwbinder driver will clean up the underlying object
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// once we clear the corresponding strong pointer.
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auto ret = gWakeLockMap[id]->release();
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if (!ret.isOk()) {
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LOG(ERROR) << "IWakeLock::release() call failed: " << ret.description();
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}
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gWakeLockMap[id].clear();
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return 0;
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}
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return -1;
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}
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