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/*
* Copyright (C) 2018 The Android Open Source Project
*
* 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
*
* http://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.
*/
#define LOG_TAG "power"
#define ATRACE_TAG ATRACE_TAG_POWER
#include <hardware_legacy/power.h>
#include <wakelock/wakelock.h>
#include <aidl/android/system/suspend/ISystemSuspend.h>
#include <aidl/android/system/suspend/IWakeLock.h>
#include <android/binder_manager.h>
#include <android-base/logging.h>
#include <utils/Trace.h>
#include <mutex>
#include <string>
#include <thread>
#include <unordered_map>
using aidl::android::system::suspend::ISystemSuspend;
using aidl::android::system::suspend::IWakeLock;
using aidl::android::system::suspend::WakeLockType;
static std::mutex gLock;
static std::unordered_map<std::string, std::shared_ptr<IWakeLock>> gWakeLockMap;
static const std::shared_ptr<ISystemSuspend> getSystemSuspendServiceOnce() {
static std::shared_ptr<ISystemSuspend> suspendService =
[]() -> std::shared_ptr<ISystemSuspend> {
std::string suspendServiceName =
ISystemSuspend::descriptor + std::string("/default");
if (!AServiceManager_isDeclared(suspendServiceName.c_str())) {
return nullptr;
}
return ISystemSuspend::fromBinder(ndk::SpAIBinder(
AServiceManager_waitForService(suspendServiceName.c_str())));
}();
return suspendService;
}
int acquire_wake_lock(int, const char* id) {
ATRACE_CALL();
const auto suspendService = getSystemSuspendServiceOnce();
if (!suspendService) {
LOG(ERROR) << "Failed to get SystemSuspend service";
return -1;
}
std::lock_guard<std::mutex> l{gLock};
if (!gWakeLockMap[id]) {
std::shared_ptr<IWakeLock> wl = nullptr;
auto status = suspendService->acquireWakeLock(WakeLockType::PARTIAL, id, &wl);
// It's possible that during device shutdown SystemSuspend service has already exited.
// Check that the wakelock object is not null.
if (!wl) {
LOG(ERROR) << "ISuspendService::acquireWakeLock() call failed: "
<< status.getDescription();
return -1;
} else {
gWakeLockMap[id] = wl;
}
}
return 0;
}
int release_wake_lock(const char* id) {
ATRACE_CALL();
std::lock_guard<std::mutex> l{gLock};
if (gWakeLockMap[id]) {
// Ignore errors on release() call since hwbinder driver will clean up the underlying object
// once we clear the corresponding shared_ptr.
auto status = gWakeLockMap[id]->release();
if (!status.isOk()) {
LOG(ERROR) << "IWakeLock::release() call failed: " << status.getDescription();
}
gWakeLockMap[id] = nullptr;
return 0;
}
return -1;
}
namespace android {
namespace wakelock {
class WakeLock::WakeLockImpl {
public:
WakeLockImpl(const std::string& name);
~WakeLockImpl();
bool acquireOk();
private:
std::shared_ptr<IWakeLock> mWakeLock;
};
std::optional<WakeLock> WakeLock::tryGet(const std::string& name) {
std::unique_ptr<WakeLockImpl> wlImpl = std::make_unique<WakeLockImpl>(name);
if (wlImpl->acquireOk()) {
return { std::move(wlImpl) };
} else {
LOG(ERROR) << "Failed to acquire wakelock: " << name;
return {};
}
}
WakeLock::WakeLock(std::unique_ptr<WakeLockImpl> wlImpl) : mImpl(std::move(wlImpl)) {}
WakeLock::~WakeLock() = default;
WakeLock::WakeLockImpl::WakeLockImpl(const std::string& name) : mWakeLock(nullptr) {
const auto suspendService = getSystemSuspendServiceOnce();
if (!suspendService) {
LOG(ERROR) << "Failed to get SystemSuspend service";
return;
}
std::shared_ptr<IWakeLock> wl = nullptr;
auto status = suspendService->acquireWakeLock(WakeLockType::PARTIAL, name, &wl);
// It's possible that during device shutdown SystemSuspend service has already exited.
// Check that the wakelock object is not null.
if (!wl) {
LOG(ERROR) << "ISuspendService::acquireWakeLock() call failed: " << status.getDescription();
} else {
mWakeLock = wl;
}
}
WakeLock::WakeLockImpl::~WakeLockImpl() {
if (!acquireOk()) {
return;
}
auto status = mWakeLock->release();
if (!status.isOk()) {
LOG(ERROR) << "IWakeLock::release() call failed: " << status.getDescription();
}
}
bool WakeLock::WakeLockImpl::acquireOk() {
return mWakeLock != nullptr;
}
} // namespace wakelock
} // namespace android
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