services/core/jni/com_android_server_power_PowerManagerService.cpp - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2010 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 "PowerManagerService-JNI"

 //#define LOG_NDEBUG 0

 #include <android/hardware/power/1.1/IPower.h>
 #include <android/system/suspend/1.0/ISystemSuspend.h>
 #include <android/system/suspend/ISuspendControlService.h>
 #include <nativehelper/JNIHelp.h>
 #include "jni.h"

 #include <nativehelper/ScopedUtfChars.h>

 #include <limits.h>

 #include <android-base/chrono_utils.h>
 #include <android_runtime/AndroidRuntime.h>
 #include <android_runtime/Log.h>
 #include <binder/IServiceManager.h>
 #include <gui/SurfaceComposerClient.h>
 #include <hardware/power.h>
 #include <hardware_legacy/power.h>
 #include <hidl/ServiceManagement.h>
 #include <utils/Timers.h>
 #include <utils/misc.h>
 #include <utils/String8.h>
 #include <utils/Log.h>

 #include "com_android_server_power_PowerManagerService.h"

 using android::hardware::Return;
 using android::hardware::Void;
 using android::hardware::power::V1_0::PowerHint;
 using android::hardware::power::V1_0::Feature;
 using android::String8;
 using android::system::suspend::V1_0::ISystemSuspend;
 using android::system::suspend::V1_0::IWakeLock;
 using android::system::suspend::V1_0::WakeLockType;
 using android::system::suspend::ISuspendControlService;
 using IPowerV1_1 = android::hardware::power::V1_1::IPower;
 using IPowerV1_0 = android::hardware::power::V1_0::IPower;

 namespace android {

 // ----------------------------------------------------------------------------

 static struct {
     jmethodID userActivityFromNative;
 } gPowerManagerServiceClassInfo;

 // ----------------------------------------------------------------------------

 static jobject gPowerManagerServiceObj;
 // Use getPowerHal* to retrieve a copy
 static sp<IPowerV1_0> gPowerHalV1_0_ = nullptr;
 static sp<IPowerV1_1> gPowerHalV1_1_ = nullptr;
 static bool gPowerHalExists = true;
 static std::mutex gPowerHalMutex;
 static nsecs_t gLastEventTime[USER_ACTIVITY_EVENT_LAST + 1];

 // Throttling interval for user activity calls.
 static const nsecs_t MIN_TIME_BETWEEN_USERACTIVITIES = 100 * 1000000L; // 100ms

 // ----------------------------------------------------------------------------

 static bool checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) {
     if (env->ExceptionCheck()) {
         ALOGE("An exception was thrown by callback '%s'.", methodName);
         LOGE_EX(env);
         env->ExceptionClear();
         return true;
     }
     return false;
 }

 // Check validity of current handle to the power HAL service, and call getService() if necessary.
 // The caller must be holding gPowerHalMutex.
 static void connectPowerHalLocked() {
     if (gPowerHalExists && gPowerHalV1_0_ == nullptr) {
         gPowerHalV1_0_ = IPowerV1_0::getService();
         if (gPowerHalV1_0_ != nullptr) {
             ALOGI("Loaded power HAL 1.0 service");
             // Try cast to powerHAL V1_1
             gPowerHalV1_1_ =  IPowerV1_1::castFrom(gPowerHalV1_0_);
             if (gPowerHalV1_1_ == nullptr) {
             } else {
                 ALOGI("Loaded power HAL 1.1 service");
             }
         } else {
             ALOGI("Couldn't load power HAL service");
             gPowerHalExists = false;
         }
     }
 }

 // Retrieve a copy of PowerHAL V1_0
 sp<IPowerV1_0> getPowerHalV1_0() {
     std::lock_guard<std::mutex> lock(gPowerHalMutex);
     connectPowerHalLocked();
     return gPowerHalV1_0_;
 }

 // Retrieve a copy of PowerHAL V1_1
 sp<IPowerV1_1> getPowerHalV1_1() {
     std::lock_guard<std::mutex> lock(gPowerHalMutex);
     connectPowerHalLocked();
     return gPowerHalV1_1_;
 }

 // Check if a call to a power HAL function failed; if so, log the failure and invalidate the
 // current handle to the power HAL service.
 bool processPowerHalReturn(const Return<void> &ret, const char* functionName) {
     if (!ret.isOk()) {
         ALOGE("%s() failed: power HAL service not available.", functionName);
         gPowerHalMutex.lock();
         gPowerHalV1_0_ = nullptr;
         gPowerHalV1_1_ = nullptr;
         gPowerHalMutex.unlock();
     }
     return ret.isOk();
 }

 static void sendPowerHint(PowerHint hintId, uint32_t data) {
     sp<IPowerV1_1> powerHalV1_1 = getPowerHalV1_1();
     Return<void> ret;
     if (powerHalV1_1 != nullptr) {
         ret = powerHalV1_1->powerHintAsync(hintId, data);
         processPowerHalReturn(ret, "powerHintAsync");
     } else {
         sp<IPowerV1_0> powerHalV1_0 = getPowerHalV1_0();
         if (powerHalV1_0 != nullptr) {
             ret = powerHalV1_0->powerHint(hintId, data);
             processPowerHalReturn(ret, "powerHint");
         }
     }

     SurfaceComposerClient::notifyPowerHint(static_cast<int32_t>(hintId));
 }

 void android_server_PowerManagerService_userActivity(nsecs_t eventTime, int32_t eventType) {
     if (gPowerManagerServiceObj) {
         // Throttle calls into user activity by event type.
         // We're a little conservative about argument checking here in case the caller
         // passes in bad data which could corrupt system state.
         if (eventType >= 0 && eventType <= USER_ACTIVITY_EVENT_LAST) {
             nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
             if (eventTime > now) {
                 eventTime = now;
             }

             if (gLastEventTime[eventType] + MIN_TIME_BETWEEN_USERACTIVITIES > eventTime) {
                 return;
             }
             gLastEventTime[eventType] = eventTime;

             // Tell the power HAL when user activity occurs.
             sendPowerHint(PowerHint::INTERACTION, 0);
         }

         JNIEnv* env = AndroidRuntime::getJNIEnv();

         env->CallVoidMethod(gPowerManagerServiceObj,
                 gPowerManagerServiceClassInfo.userActivityFromNative,
                 nanoseconds_to_milliseconds(eventTime), eventType, 0);
         checkAndClearExceptionFromCallback(env, "userActivityFromNative");
     }
 }

 static sp<ISystemSuspend> gSuspendHal = nullptr;
 static sp<ISuspendControlService> gSuspendControl = nullptr;
 static sp<IWakeLock> gSuspendBlocker = nullptr;
 static std::mutex gSuspendMutex;

 // Assume SystemSuspend HAL is always alive.
 // TODO: Force device to restart if SystemSuspend HAL dies.
 sp<ISystemSuspend> getSuspendHal() {
     static std::once_flag suspendHalFlag;
     std::call_once(suspendHalFlag, [](){
         ::android::hardware::details::waitForHwService(ISystemSuspend::descriptor, "default");
         gSuspendHal = ISystemSuspend::getService();
         assert(gSuspendHal != nullptr);
     });
     return gSuspendHal;
 }

 sp<ISuspendControlService> getSuspendControl() {
     static std::once_flag suspendControlFlag;
     std::call_once(suspendControlFlag, [](){
         while(gSuspendControl == nullptr) {
             sp<IBinder> control =
                     defaultServiceManager()->getService(String16("suspend_control"));
             if (control != nullptr) {
                 gSuspendControl = interface_cast<ISuspendControlService>(control);
             }
         }
     });
     return gSuspendControl;
 }

 void enableAutoSuspend() {
     static bool enabled = false;
     if (!enabled) {
         sp<ISuspendControlService> suspendControl = getSuspendControl();
         suspendControl->enableAutosuspend(&enabled);
     }

     {
         std::lock_guard<std::mutex> lock(gSuspendMutex);
         if (gSuspendBlocker) {
             gSuspendBlocker->release();
             gSuspendBlocker.clear();
         }
     }
 }

 void disableAutoSuspend() {
     std::lock_guard<std::mutex> lock(gSuspendMutex);
     if (!gSuspendBlocker) {
         sp<ISystemSuspend> suspendHal = getSuspendHal();
         gSuspendBlocker = suspendHal->acquireWakeLock(WakeLockType::PARTIAL,
                 "PowerManager.SuspendLockout");
     }
 }

 // ----------------------------------------------------------------------------

 static void nativeInit(JNIEnv* env, jobject obj) {
     gPowerManagerServiceObj = env->NewGlobalRef(obj);

     gPowerHalMutex.lock();
     connectPowerHalLocked();
     gPowerHalMutex.unlock();
 }

 static void nativeAcquireSuspendBlocker(JNIEnv *env, jclass /* clazz */, jstring nameStr) {
     ScopedUtfChars name(env, nameStr);
     acquire_wake_lock(PARTIAL_WAKE_LOCK, name.c_str());
 }

 static void nativeReleaseSuspendBlocker(JNIEnv *env, jclass /* clazz */, jstring nameStr) {
     ScopedUtfChars name(env, nameStr);
     release_wake_lock(name.c_str());
 }

 static void nativeSetInteractive(JNIEnv* /* env */, jclass /* clazz */, jboolean enable) {
     sp<IPowerV1_0> powerHalV1_0 = getPowerHalV1_0();
     if (powerHalV1_0 != nullptr) {
         android::base::Timer t;
         Return<void> ret = powerHalV1_0->setInteractive(enable);
         processPowerHalReturn(ret, "setInteractive");
         if (t.duration() > 20ms) {
             ALOGD("Excessive delay in setInteractive(%s) while turning screen %s",
                   enable ? "true" : "false", enable ? "on" : "off");
         }
     }
 }

 static void nativeSetAutoSuspend(JNIEnv* /* env */, jclass /* clazz */, jboolean enable) {
     if (enable) {
         android::base::Timer t;
         enableAutoSuspend();
         if (t.duration() > 100ms) {
             ALOGD("Excessive delay in autosuspend_enable() while turning screen off");
         }
     } else {
         android::base::Timer t;
         disableAutoSuspend();
         if (t.duration() > 100ms) {
             ALOGD("Excessive delay in autosuspend_disable() while turning screen on");
         }
     }
 }

 static void nativeSendPowerHint(JNIEnv* /* env */, jclass /* clazz */, jint hintId, jint data) {
     sendPowerHint(static_cast<PowerHint>(hintId), data);
 }

 static void nativeSetFeature(JNIEnv* /* env */, jclass /* clazz */, jint featureId, jint data) {
     sp<IPowerV1_0> powerHalV1_0 = getPowerHalV1_0();
     if (powerHalV1_0 != nullptr) {
         Return<void> ret = powerHalV1_0->setFeature((Feature)featureId, static_cast<bool>(data));
         processPowerHalReturn(ret, "setFeature");
     }
 }

 static bool nativeForceSuspend(JNIEnv* /* env */, jclass /* clazz */) {
     bool retval = false;
     getSuspendControl()->forceSuspend(&retval);
     return retval;
 }

 // ----------------------------------------------------------------------------

 static const JNINativeMethod gPowerManagerServiceMethods[] = {
     /* name, signature, funcPtr */
     { "nativeInit", "()V",
             (void*) nativeInit },
     { "nativeAcquireSuspendBlocker", "(Ljava/lang/String;)V",
             (void*) nativeAcquireSuspendBlocker },
     { "nativeForceSuspend", "()Z",
             (void*) nativeForceSuspend },
     { "nativeReleaseSuspendBlocker", "(Ljava/lang/String;)V",
             (void*) nativeReleaseSuspendBlocker },
     { "nativeSetInteractive", "(Z)V",
             (void*) nativeSetInteractive },
     { "nativeSetAutoSuspend", "(Z)V",
             (void*) nativeSetAutoSuspend },
     { "nativeSendPowerHint", "(II)V",
             (void*) nativeSendPowerHint },
     { "nativeSetFeature", "(II)V",
             (void*) nativeSetFeature },
 };

 #define FIND_CLASS(var, className) \
         var = env->FindClass(className); \
         LOG_FATAL_IF(! (var), "Unable to find class " className);

 #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
         var = env->GetMethodID(clazz, methodName, methodDescriptor); \
         LOG_FATAL_IF(! (var), "Unable to find method " methodName);

 #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
         var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
         LOG_FATAL_IF(! (var), "Unable to find field " fieldName);

 int register_android_server_PowerManagerService(JNIEnv* env) {
     int res = jniRegisterNativeMethods(env, "com/android/server/power/PowerManagerService",
             gPowerManagerServiceMethods, NELEM(gPowerManagerServiceMethods));
     (void) res;  // Faked use when LOG_NDEBUG.
     LOG_FATAL_IF(res < 0, "Unable to register native methods.");

     // Callbacks

     jclass clazz;
     FIND_CLASS(clazz, "com/android/server/power/PowerManagerService");

     GET_METHOD_ID(gPowerManagerServiceClassInfo.userActivityFromNative, clazz,
             "userActivityFromNative", "(JII)V");

     // Initialize
     for (int i = 0; i <= USER_ACTIVITY_EVENT_LAST; i++) {
         gLastEventTime[i] = LLONG_MIN;
     }
     gPowerManagerServiceObj = NULL;
     return 0;
 }

 } /* namespace android */
	/*
	* Copyright (C) 2010 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 "PowerManagerService-JNI"

	//#define LOG_NDEBUG 0

	#include <android/hardware/power/1.1/IPower.h>
	#include <android/system/suspend/1.0/ISystemSuspend.h>
	#include <android/system/suspend/ISuspendControlService.h>
	#include <nativehelper/JNIHelp.h>
	#include "jni.h"

	#include <nativehelper/ScopedUtfChars.h>

	#include <limits.h>

	#include <android-base/chrono_utils.h>
	#include <android_runtime/AndroidRuntime.h>
	#include <android_runtime/Log.h>
	#include <binder/IServiceManager.h>
	#include <gui/SurfaceComposerClient.h>
	#include <hardware/power.h>
	#include <hardware_legacy/power.h>
	#include <hidl/ServiceManagement.h>
	#include <utils/Timers.h>
	#include <utils/misc.h>
	#include <utils/String8.h>
	#include <utils/Log.h>

	#include "com_android_server_power_PowerManagerService.h"

	using android::hardware::Return;
	using android::hardware::Void;
	using android::hardware::power::V1_0::PowerHint;
	using android::hardware::power::V1_0::Feature;
	using android::String8;
	using android::system::suspend::V1_0::ISystemSuspend;
	using android::system::suspend::V1_0::IWakeLock;
	using android::system::suspend::V1_0::WakeLockType;
	using android::system::suspend::ISuspendControlService;
	using IPowerV1_1 = android::hardware::power::V1_1::IPower;
	using IPowerV1_0 = android::hardware::power::V1_0::IPower;

	namespace android {

	// ----------------------------------------------------------------------------

	static struct {
	jmethodID userActivityFromNative;
	} gPowerManagerServiceClassInfo;

	// ----------------------------------------------------------------------------

	static jobject gPowerManagerServiceObj;
	// Use getPowerHal* to retrieve a copy
	static sp<IPowerV1_0> gPowerHalV1_0_ = nullptr;
	static sp<IPowerV1_1> gPowerHalV1_1_ = nullptr;
	static bool gPowerHalExists = true;
	static std::mutex gPowerHalMutex;
	static nsecs_t gLastEventTime[USER_ACTIVITY_EVENT_LAST + 1];

	// Throttling interval for user activity calls.
	static const nsecs_t MIN_TIME_BETWEEN_USERACTIVITIES = 100 * 1000000L; // 100ms

	// ----------------------------------------------------------------------------

	static bool checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) {
	if (env->ExceptionCheck()) {
	ALOGE("An exception was thrown by callback '%s'.", methodName);
	LOGE_EX(env);
	env->ExceptionClear();
	return true;
	}
	return false;
	}

	// Check validity of current handle to the power HAL service, and call getService() if necessary.
	// The caller must be holding gPowerHalMutex.
	static void connectPowerHalLocked() {
	if (gPowerHalExists && gPowerHalV1_0_ == nullptr) {
	gPowerHalV1_0_ = IPowerV1_0::getService();
	if (gPowerHalV1_0_ != nullptr) {
	ALOGI("Loaded power HAL 1.0 service");
	// Try cast to powerHAL V1_1
	gPowerHalV1_1_ = IPowerV1_1::castFrom(gPowerHalV1_0_);
	if (gPowerHalV1_1_ == nullptr) {
	} else {
	ALOGI("Loaded power HAL 1.1 service");
	}
	} else {
	ALOGI("Couldn't load power HAL service");
	gPowerHalExists = false;
	}
	}
	}

	// Retrieve a copy of PowerHAL V1_0
	sp<IPowerV1_0> getPowerHalV1_0() {
	std::lock_guard<std::mutex> lock(gPowerHalMutex);
	connectPowerHalLocked();
	return gPowerHalV1_0_;
	}

	// Retrieve a copy of PowerHAL V1_1
	sp<IPowerV1_1> getPowerHalV1_1() {
	std::lock_guard<std::mutex> lock(gPowerHalMutex);
	connectPowerHalLocked();
	return gPowerHalV1_1_;
	}

	// Check if a call to a power HAL function failed; if so, log the failure and invalidate the
	// current handle to the power HAL service.
	bool processPowerHalReturn(const Return<void> &ret, const char* functionName) {
	if (!ret.isOk()) {
	ALOGE("%s() failed: power HAL service not available.", functionName);
	gPowerHalMutex.lock();
	gPowerHalV1_0_ = nullptr;
	gPowerHalV1_1_ = nullptr;
	gPowerHalMutex.unlock();
	}
	return ret.isOk();
	}

	static void sendPowerHint(PowerHint hintId, uint32_t data) {
	sp<IPowerV1_1> powerHalV1_1 = getPowerHalV1_1();
	Return<void> ret;
	if (powerHalV1_1 != nullptr) {
	ret = powerHalV1_1->powerHintAsync(hintId, data);
	processPowerHalReturn(ret, "powerHintAsync");
	} else {
	sp<IPowerV1_0> powerHalV1_0 = getPowerHalV1_0();
	if (powerHalV1_0 != nullptr) {
	ret = powerHalV1_0->powerHint(hintId, data);
	processPowerHalReturn(ret, "powerHint");
	}
	}

	SurfaceComposerClient::notifyPowerHint(static_cast<int32_t>(hintId));
	}

	void android_server_PowerManagerService_userActivity(nsecs_t eventTime, int32_t eventType) {
	if (gPowerManagerServiceObj) {
	// Throttle calls into user activity by event type.
	// We're a little conservative about argument checking here in case the caller
	// passes in bad data which could corrupt system state.
	if (eventType >= 0 && eventType <= USER_ACTIVITY_EVENT_LAST) {
	nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
	if (eventTime > now) {
	eventTime = now;
	}

	if (gLastEventTime[eventType] + MIN_TIME_BETWEEN_USERACTIVITIES > eventTime) {
	return;
	}
	gLastEventTime[eventType] = eventTime;

	// Tell the power HAL when user activity occurs.
	sendPowerHint(PowerHint::INTERACTION, 0);
	}

	JNIEnv* env = AndroidRuntime::getJNIEnv();

	env->CallVoidMethod(gPowerManagerServiceObj,
	gPowerManagerServiceClassInfo.userActivityFromNative,
	nanoseconds_to_milliseconds(eventTime), eventType, 0);
	checkAndClearExceptionFromCallback(env, "userActivityFromNative");
	}
	}

	static sp<ISystemSuspend> gSuspendHal = nullptr;
	static sp<ISuspendControlService> gSuspendControl = nullptr;
	static sp<IWakeLock> gSuspendBlocker = nullptr;
	static std::mutex gSuspendMutex;

	// Assume SystemSuspend HAL is always alive.
	// TODO: Force device to restart if SystemSuspend HAL dies.
	sp<ISystemSuspend> getSuspendHal() {
	static std::once_flag suspendHalFlag;
	std::call_once(suspendHalFlag, [](){
	::android::hardware::details::waitForHwService(ISystemSuspend::descriptor, "default");
	gSuspendHal = ISystemSuspend::getService();
	assert(gSuspendHal != nullptr);
	});
	return gSuspendHal;
	}

	sp<ISuspendControlService> getSuspendControl() {
	static std::once_flag suspendControlFlag;
	std::call_once(suspendControlFlag, [](){
	while(gSuspendControl == nullptr) {
	sp<IBinder> control =
	defaultServiceManager()->getService(String16("suspend_control"));
	if (control != nullptr) {
	gSuspendControl = interface_cast<ISuspendControlService>(control);
	}
	}
	});
	return gSuspendControl;
	}

	void enableAutoSuspend() {
	static bool enabled = false;
	if (!enabled) {
	sp<ISuspendControlService> suspendControl = getSuspendControl();
	suspendControl->enableAutosuspend(&enabled);
	}

	{
	std::lock_guard<std::mutex> lock(gSuspendMutex);
	if (gSuspendBlocker) {
	gSuspendBlocker->release();
	gSuspendBlocker.clear();
	}
	}
	}

	void disableAutoSuspend() {
	std::lock_guard<std::mutex> lock(gSuspendMutex);
	if (!gSuspendBlocker) {
	sp<ISystemSuspend> suspendHal = getSuspendHal();
	gSuspendBlocker = suspendHal->acquireWakeLock(WakeLockType::PARTIAL,
	"PowerManager.SuspendLockout");
	}
	}

	// ----------------------------------------------------------------------------

	static void nativeInit(JNIEnv* env, jobject obj) {
	gPowerManagerServiceObj = env->NewGlobalRef(obj);

	gPowerHalMutex.lock();
	connectPowerHalLocked();
	gPowerHalMutex.unlock();
	}

	static void nativeAcquireSuspendBlocker(JNIEnv env, jclass / clazz */, jstring nameStr) {
	ScopedUtfChars name(env, nameStr);
	acquire_wake_lock(PARTIAL_WAKE_LOCK, name.c_str());
	}

	static void nativeReleaseSuspendBlocker(JNIEnv env, jclass / clazz */, jstring nameStr) {
	ScopedUtfChars name(env, nameStr);
	release_wake_lock(name.c_str());
	}

	static void nativeSetInteractive(JNIEnv* /* env /, jclass / clazz */, jboolean enable) {
	sp<IPowerV1_0> powerHalV1_0 = getPowerHalV1_0();
	if (powerHalV1_0 != nullptr) {
	android::base::Timer t;
	Return<void> ret = powerHalV1_0->setInteractive(enable);
	processPowerHalReturn(ret, "setInteractive");
	if (t.duration() > 20ms) {
	ALOGD("Excessive delay in setInteractive(%s) while turning screen %s",
	enable ? "true" : "false", enable ? "on" : "off");
	}
	}
	}

	static void nativeSetAutoSuspend(JNIEnv* /* env /, jclass / clazz */, jboolean enable) {
	if (enable) {
	android::base::Timer t;
	enableAutoSuspend();
	if (t.duration() > 100ms) {
	ALOGD("Excessive delay in autosuspend_enable() while turning screen off");
	}
	} else {
	android::base::Timer t;
	disableAutoSuspend();
	if (t.duration() > 100ms) {
	ALOGD("Excessive delay in autosuspend_disable() while turning screen on");
	}
	}
	}

	static void nativeSendPowerHint(JNIEnv* /* env /, jclass / clazz */, jint hintId, jint data) {
	sendPowerHint(static_cast<PowerHint>(hintId), data);
	}

	static void nativeSetFeature(JNIEnv* /* env /, jclass / clazz */, jint featureId, jint data) {
	sp<IPowerV1_0> powerHalV1_0 = getPowerHalV1_0();
	if (powerHalV1_0 != nullptr) {
	Return<void> ret = powerHalV1_0->setFeature((Feature)featureId, static_cast<bool>(data));
	processPowerHalReturn(ret, "setFeature");
	}
	}

	static bool nativeForceSuspend(JNIEnv* /* env /, jclass / clazz */) {
	bool retval = false;
	getSuspendControl()->forceSuspend(&retval);
	return retval;
	}

	// ----------------------------------------------------------------------------

	static const JNINativeMethod gPowerManagerServiceMethods[] = {
	/* name, signature, funcPtr */
	{ "nativeInit", "()V",
	(void*) nativeInit },
	{ "nativeAcquireSuspendBlocker", "(Ljava/lang/String;)V",
	(void*) nativeAcquireSuspendBlocker },
	{ "nativeForceSuspend", "()Z",
	(void*) nativeForceSuspend },
	{ "nativeReleaseSuspendBlocker", "(Ljava/lang/String;)V",
	(void*) nativeReleaseSuspendBlocker },
	{ "nativeSetInteractive", "(Z)V",
	(void*) nativeSetInteractive },
	{ "nativeSetAutoSuspend", "(Z)V",
	(void*) nativeSetAutoSuspend },
	{ "nativeSendPowerHint", "(II)V",
	(void*) nativeSendPowerHint },
	{ "nativeSetFeature", "(II)V",
	(void*) nativeSetFeature },
	};

	#define FIND_CLASS(var, className) \
	var = env->FindClass(className); \
	LOG_FATAL_IF(! (var), "Unable to find class " className);

	#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
	var = env->GetMethodID(clazz, methodName, methodDescriptor); \
	LOG_FATAL_IF(! (var), "Unable to find method " methodName);

	#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
	var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
	LOG_FATAL_IF(! (var), "Unable to find field " fieldName);

	int register_android_server_PowerManagerService(JNIEnv* env) {
	int res = jniRegisterNativeMethods(env, "com/android/server/power/PowerManagerService",
	gPowerManagerServiceMethods, NELEM(gPowerManagerServiceMethods));
	(void) res; // Faked use when LOG_NDEBUG.
	LOG_FATAL_IF(res < 0, "Unable to register native methods.");

	// Callbacks

	jclass clazz;
	FIND_CLASS(clazz, "com/android/server/power/PowerManagerService");

	GET_METHOD_ID(gPowerManagerServiceClassInfo.userActivityFromNative, clazz,
	"userActivityFromNative", "(JII)V");

	// Initialize
	for (int i = 0; i <= USER_ACTIVITY_EVENT_LAST; i++) {
	gLastEventTime[i] = LLONG_MIN;
	}
	gPowerManagerServiceObj = NULL;
	return 0;
	}

	} /* namespace android */