add basic support for Android Thermal Manager

libs/utils/CMakeLists.txt

@@ -73,6 +73,9 @@ set(SRCS
 if (WIN32)
     list(APPEND SRCS src/win32/Path.cpp)
 endif()
+if (ANDROID)
+    list(APPEND SRCS src/android/ThermalManager.cpp)
+endif()
 if (LINUX OR ANDROID)
     list(APPEND SRCS src/linux/Condition.cpp)
     list(APPEND SRCS src/linux/Mutex.cpp)

libs/utils/include/utils/ThermalManager.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#ifndef TNT_UTILS_THERMALMANAGER_H
+#define TNT_UTILS_THERMALMANAGER_H
+
+#if defined(__ANDROID__)
+#include <utils/android/ThermalManager.h>
+#else
+#include <utils/generic/ThermalManager.h>
+#endif
+
+#endif // TNT_UTILS_THERMALMANAGER_H

libs/utils/include/utils/android/ThermalManager.h

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#ifndef TNT_UTILS_ANDROID_THERMALMANAGER_H
+#define TNT_UTILS_ANDROID_THERMALMANAGER_H
+
+#include <utils/compiler.h>
+
+#include <stdint.h>
+
+struct AThermalManager;
+
+namespace utils {
+
+class ThermalManager {
+public:
+    enum class ThermalStatus : int8_t {
+        ERROR = -1,
+        NONE,
+        LIGHT,
+        MODERATE,
+        SEVERE,
+        CRITICAL,
+        EMERGENCY,
+        SHUTDOWN
+    };
+
+    ThermalManager();
+    ~ThermalManager();
+
+    // Movable
+    ThermalManager(ThermalManager&& rhs) noexcept;
+    ThermalManager& operator=(ThermalManager&& rhs) noexcept;
+
+    // not copiable
+    ThermalManager(ThermalManager const& rhs) = delete;
+    ThermalManager& operator=(ThermalManager const& rhs) = delete;
+
+    ThermalStatus getCurrentThermalStatus() const noexcept;
+
+private:
+    AThermalManager* mThermalManager = nullptr;
+};
+
+} // namespace utils
+
+#endif // TNT_UTILS_ANDROID_THERMALMANAGER_H

libs/utils/include/utils/generic/ThermalManager.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#ifndef TNT_UTILS_GENERIC_THERMALMANAGER_H
+#define TNT_UTILS_GENERIC_THERMALMANAGER_H
+
+#include <utils/compiler.h>
+
+#include <stdint.h>
+
+namespace utils {
+
+class ThermalManager {
+public:
+    enum class ThermalStatus : int8_t {
+        ERROR = -1,
+        NONE,
+        LIGHT,
+        MODERATE,
+        SEVERE,
+        CRITICAL,
+        EMERGENCY,
+        SHUTDOWN
+    };
+
+    ThermalManager() = default;
+
+    // Movable
+    ThermalManager(ThermalManager&& rhs) noexcept = default;
+    ThermalManager& operator=(ThermalManager&& rhs) noexcept = default;
+
+    // not copiable
+    ThermalManager(ThermalManager const& rhs) = delete;
+    ThermalManager& operator=(ThermalManager const& rhs) = delete;
+
+    ThermalStatus getCurrentThermalStatus() const noexcept {
+        return ThermalStatus::NONE;
+    }
+};
+
+} // namespace utils
+
+#endif // TNT_UTILS_GENERIC_THERMALMANAGER_H

libs/utils/src/android/ThermalManager.cpp

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#include <utils/android/ThermalManager.h>
+
+#include <android/Thermal.h>
+
+#include <utility>
+
+namespace utils {
+
+ThermalManager::ThermalManager() {
+    if (__builtin_available(android 30, *)) {
+        mThermalManager = AThermal_acquireManager();
+    }
+}
+
+ThermalManager::~ThermalManager() {
+    if (__builtin_available(android 30, *)) {
+        AThermal_releaseManager(mThermalManager);
+    }
+}
+
+ThermalManager::ThermalManager(ThermalManager&& rhs) noexcept
+        : mThermalManager(rhs.mThermalManager) {
+    rhs.mThermalManager = nullptr;
+}
+
+ThermalManager& ThermalManager::operator=(ThermalManager&& rhs) noexcept {
+    std::swap(mThermalManager, rhs.mThermalManager);
+    return *this;
+}
+
+ThermalManager::ThermalStatus ThermalManager::getCurrentThermalStatus() const noexcept {
+    if (__builtin_available(android 30, *)) {
+        return (ThermalManager::ThermalStatus)AThermal_getCurrentThermalStatus(mThermalManager);
+    } else {
+        return ThermalStatus::NONE;
+    }
+}
+
+} // namespace utils