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Commit 1c838967 authored by Chris Ye's avatar Chris Ye Committed by Android (Google) Code Review
Browse files

Merge "Create native version of Thermal Throttling API."

parents 33197de2 1a5a8886
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/*
 * Copyright (C) 2020 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 ANDROID_OS_COOLINGDEVICE_H
#define ANDROID_OS_COOLINGDEVICE_H

#include <binder/Parcelable.h>
#include <utils/RefBase.h>

namespace android {
namespace os {

/**
 * CoolingDevice is a structure to encapsulate cooling device status.
 */
struct CoolingDevice : public android::Parcelable {
    /** Current throttle state of the cooling device.  */
    float mValue;
    /** A cooling device type from ThermalHAL */
    uint32_t mType;
    /** Name of this cooling device */
    String16 mName;

    CoolingDevice()
        : mValue(0.0f),
          mType(0),
          mName("") {
    }
    virtual status_t readFromParcel(const android::Parcel* parcel) override;
    virtual status_t writeToParcel(android::Parcel* parcel) const override;
};

} // namespace os
} // namespace android

#endif /* ANDROID_OS_COOLINGDEVICE_H */
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/*
 * Copyright (C) 2020 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 ANDROID_OS_TEMPERATURE_H
#define ANDROID_OS_TEMPERATURE_H

#include <binder/Parcelable.h>
#include <utils/RefBase.h>

namespace android {
namespace os {

/**
 * Temperature is a structure to encapsulate temperature status.
 */
struct Temperature : public android::Parcelable {
    /** Temperature value */
    float mValue;
    /** A Temperature type from ThermalHAL */
    int32_t mType;
    /** Name of this Temperature */
    String16 mName;
    /** The level of the sensor is currently in throttling */
    int32_t mStatus;

    Temperature()
        : mValue(0.0f),
          mType(0),
          mName(""),
          mStatus(0) {
    }

    virtual status_t readFromParcel(const android::Parcel* parcel) override;
    virtual status_t writeToParcel(android::Parcel* parcel) const override;
};

} // namespace os
} // namespace android

#endif /* ANDROID_OS_TEMPERATURE_H */
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/*
 * Copyright (C) 2020 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.
 */

/**
 * @addtogroup Thermal
 * @{
 */

/**
 * @file thermal.h
 */

#ifndef _ANDROID_THERMAL_H
#define _ANDROID_THERMAL_H

#include <sys/cdefs.h>

/******************************************************************
 *
 * IMPORTANT NOTICE:
 *
 *   This file is part of Android's set of stable system headers
 *   exposed by the Android NDK (Native Development Kit).
 *
 *   Third-party source AND binary code relies on the definitions
 *   here to be FROZEN ON ALL UPCOMING PLATFORM RELEASES.
 *
 *   - DO NOT MODIFY ENUMS (EXCEPT IF YOU ADD NEW 32-BIT VALUES)
 *   - DO NOT MODIFY CONSTANTS OR FUNCTIONAL MACROS
 *   - DO NOT CHANGE THE SIGNATURE OF FUNCTIONS IN ANY WAY
 *   - DO NOT CHANGE THE LAYOUT OR SIZE OF STRUCTURES
 */

/*
 * Structures and functions to access thermal status and register/unregister
 * thermal status listener in native code.
 */

#include <stdint.h>
#include <sys/types.h>

#if !defined(__INTRODUCED_IN)
#define __INTRODUCED_IN(30) /* Introduced in API level 30 */
#endif

#ifdef __cplusplus
extern "C" {
#endif

#if __ANDROID_API__ >= 30

enum AThermalStatus {
    /** Error in thermal status. */
    ATHERMAL_STATUS_ERROR = -1,
    /** Not under throttling. */
    ATHERMAL_STATUS_NONE = 0,
    /** Light throttling where UX is not impacted. */
    ATHERMAL_STATUS_LIGHT = 1,
    /** Moderate throttling where UX is not largely impacted. */
    ATHERMAL_STATUS_MODERATE = 2,
    /** Severe throttling where UX is largely impacted. */
    ATHERMAL_STATUS_SEVERE = 3,
    /** Platform has done everything to reduce power. */
    ATHERMAL_STATUS_CRITICAL = 4,
    /**
     * Key components in platform are shutting down due to thermal condition.
     * Device functionalities will be limited.
     */
    ATHERMAL_STATUS_EMERGENCY = 5,
    /** Need shutdown immediately. */
    ATHERMAL_STATUS_SHUTDOWN = 6,
};

/**
 * An opaque type representing a handle to a thermal manager.
 * An instance of thermal manager must be acquired prior to
 * using thermal status APIs and must be released after use.
 *
 * <p>To use:<ul>
 *    <li>Create a new thermal manager instance by calling the
 *        {@link AThermal_acquireManager} function.</li>
 *    <li>Get current thermal status with
 *        {@link AThermal_getCurrentThermalStatus}.</li>
 *    <li>Register a thermal status listener with
 *        {@link AThermal_registerThermalStatusListener}.</li>
 *    <li>Unregister a thermal status listener with
 *        {@link AThermal_unregisterThermalStatusListener}.</li>
 *    <li>Release the thermal manager instance with
 *        {@link AThermal_releaseManager}.</li></ul></p>
 *
 */
typedef struct AThermalManager AThermalManager;

/**
 * Prototype of the function that is called when thermal status changes.
 * It's passed the updated thermal status as parameter, as well as the
 * pointer provided by the client that registered a callback.
 */
typedef int (*AThermal_StatusCallback)(void *data, AThermalStatus status);

/**
  * Acquire an instance of the thermal manager. This must be freed using
  * {@link AThermal_releaseManager}.
  *
  * @return manager instance on success, nullptr on failure.
 */
AThermalManager* AThermal_acquireManager();

/**
 * Release the thermal manager pointer acquired via
 * {@link AThermal_acquireManager}.
 *
 * @param manager The manager to be released.
 *
 */
void AThermal_releaseManager(AThermalManager *manager);

/**
  * Gets the current thermal status.
  *
  * @param manager The manager instance to use to query the thermal status.
  * Acquired via {@link AThermal_acquireManager}.
  *
  * @return current thermal status, ATHERMAL_STATUS_ERROR on failure.
*/
AThermalStatus AThermal_getCurrentThermalStatus(AThermalManager *manager);

/**
 * Register the thermal status listener for thermal status change.
 *
 * @param manager The manager instance to use to register.
 * Acquired via {@link AThermal_acquireManager}.
 * @param callback The callback function to be called when thermal status updated.
 * @param data The data pointer to be passed when callback is called.
 *
 * @return 0 on success
 *         EINVAL if the listener and data pointer were previously added and not removed.
 *         EPERM if the required permission is not held.
 *         EPIPE if communication with the system service has failed.
 */
int AThermal_registerThermalStatusListener(AThermalManager *manager,
        AThermal_StatusCallback callback, void *data);

/**
 * Unregister the thermal status listener previously resgistered.
 *
 * @param manager The manager instance to use to unregister.
 * Acquired via {@link AThermal_acquireManager}.
 * @param callback The callback function to be called when thermal status updated.
 * @param data The data pointer to be passed when callback is called.
 *
 * @return 0 on success
 *         EINVAL if the listener and data pointer were not previously added.
 *         EPERM if the required permission is not held.
 *         EPIPE if communication with the system service has failed.
 */
int AThermal_unregisterThermalStatusListener(AThermalManager *manager,
        AThermal_StatusCallback callback, void *data);


#endif  //  __ANDROID_API__ >= 30

#ifdef __cplusplus
}
#endif

#endif // _ANDROID_THERMAL_H

/** @} */
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@@ -33,6 +33,17 @@ enum {
    USER_ACTIVITY_EVENT_LAST = USER_ACTIVITY_EVENT_ACCESSIBILITY, // Last valid event code.
};

/** Keep in sync with android.os.temprature and hardware/interfaces/thermal/2.0/types.hal */
enum class ThermalStatus : uint32_t {
    THERMAL_STATUS_NONE = 0,
    THERMAL_STATUS_LIGHT = 1,
    THERMAL_STATUS_MODERATE = 2,
    THERMAL_STATUS_SEVERE = 3,
    THERMAL_STATUS_CRITICAL = 4,
    THERMAL_STATUS_EMERGENCY = 5,
    THERMAL_STATUS_SHUTDOWN = 6,
};

}; // namespace android

#endif // ANDROID_POWERMANAGER_H
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cc_library_shared {
    name: "libpowermanager",

    srcs: ["IPowerManager.cpp"],
    srcs: [
        "IPowerManager.cpp",
        "Temperature.cpp",
        "CoolingDevice.cpp",
        ":libpowermanager_aidl",
    ],

    aidl: {
       local_include_dirs: ["."],
       include_dirs: [
           "frameworks/base/core/java/android/os",
       ],
       export_aidl_headers: true
    },

    shared_libs: [
        "libutils",
        "libbinder",
        "liblog"
    ],

    cflags: [
@@ -15,3 +29,22 @@ cc_library_shared {
        "-Wunreachable-code",
    ],
}

cc_test {
    name: "thermalmanager-test",
    srcs: ["IThermalManagerTest.cpp",
          ],
    cflags: [
        "-Wall",
        "-Werror",
        "-Wextra",
    ],
    shared_libs: [
        "libbase",
        "libhidlbase",
        "liblog",
        "libpowermanager",
        "libbinder",
        "libutils",
    ],
}
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