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/1.0/IPower.h>
 #include "JNIHelp.h"
 #include "jni.h"

 #include <ScopedUtfChars.h>

 #include <limits.h>

 #include <android_runtime/AndroidRuntime.h>
 #include <android_runtime/Log.h>
 #include <utils/Timers.h>
 #include <utils/misc.h>
 #include <utils/String8.h>
 #include <utils/Log.h>
 #include <hardware/power.h>
 #include <hardware_legacy/power.h>
 #include <suspend/autosuspend.h>

 #include "com_android_server_power_PowerManagerService.h"

 using android::hardware::Return;
 using android::hardware::Void;
 using android::hardware::power::V1_0::IPower;
 using android::hardware::power::V1_0::PowerHint;
 using android::hardware::power::V1_0::Feature;
 using android::String8;

 namespace android {

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

 static struct {
     jmethodID userActivityFromNative;
 } gPowerManagerServiceClassInfo;

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

 static jobject gPowerManagerServiceObj;
 sp<IPower> gPowerHal = nullptr;
 bool gPowerHalExists = true;
 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.
 bool getPowerHal() {
     if (gPowerHalExists && gPowerHal == nullptr) {
         gPowerHal = IPower::getService();
         if (gPowerHal != nullptr) {
             ALOGI("Loaded power HAL service");
         } else {
             ALOGI("Couldn't load power HAL service");
             gPowerHalExists = false;
         }
     }
     return gPowerHal != nullptr;
 }

 // 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. The caller must be holding gPowerHalMutex.
 static void processReturn(const Return<void> &ret, const char* functionName) {
     if (!ret.isOk()) {
         ALOGE("%s() failed: power HAL service not available.", functionName);
         gPowerHal = nullptr;
     }
 }

 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.
             gPowerHalMutex.lock();
             if (getPowerHal()) {
               Return<void> ret;
               ret = gPowerHal->powerHint(PowerHint::INTERACTION, 0);
               processReturn(ret, "powerHint");
             }
             gPowerHalMutex.unlock();

         }

         JNIEnv* env = AndroidRuntime::getJNIEnv();

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

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

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

     gPowerHalMutex.lock();
     getPowerHal();
     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) {
     std::lock_guard<std::mutex> lock(gPowerHalMutex);
     if (getPowerHal()) {
         String8 err("Excessive delay in setInteractive(%s) while turning screen %s");
         ALOGD_IF_SLOW(20, String8::format(err, enable ? "true" : "false", enable ? "on" : "off"));
         Return<void> ret = gPowerHal->setInteractive(enable);
         processReturn(ret, "setInteractive");
     }
 }

 static void nativeSetAutoSuspend(JNIEnv* /* env */, jclass /* clazz */, jboolean enable) {
     if (enable) {
         ALOGD_IF_SLOW(100, "Excessive delay in autosuspend_enable() while turning screen off");
         autosuspend_enable();
     } else {
         ALOGD_IF_SLOW(100, "Excessive delay in autosuspend_disable() while turning screen on");
         autosuspend_disable();
     }
 }

 static void nativeSendPowerHint(JNIEnv *env, jclass clazz, jint hintId, jint data) {
     std::lock_guard<std::mutex> lock(gPowerHalMutex);
     if (getPowerHal()) {
         Return<void> ret =  gPowerHal->powerHint((PowerHint)hintId, data);
         processReturn(ret, "powerHint");
     }
 }

 static void nativeSetFeature(JNIEnv *env, jclass clazz, jint featureId, jint data) {
     std::lock_guard<std::mutex> lock(gPowerHalMutex);
     if (getPowerHal()) {
         Return<void> ret = gPowerHal->setFeature((Feature)featureId, static_cast<bool>(data));
         processReturn(ret, "setFeature");
     }
 }

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

 static const JNINativeMethod gPowerManagerServiceMethods[] = {
     /* name, signature, funcPtr */
     { "nativeInit", "()V",
             (void*) nativeInit },
     { "nativeAcquireSuspendBlocker", "(Ljava/lang/String;)V",
             (void*) nativeAcquireSuspendBlocker },
     { "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/1.0/IPower.h>
	#include "JNIHelp.h"
	#include "jni.h"

	#include <ScopedUtfChars.h>

	#include <limits.h>

	#include <android_runtime/AndroidRuntime.h>
	#include <android_runtime/Log.h>
	#include <utils/Timers.h>
	#include <utils/misc.h>
	#include <utils/String8.h>
	#include <utils/Log.h>
	#include <hardware/power.h>
	#include <hardware_legacy/power.h>
	#include <suspend/autosuspend.h>

	#include "com_android_server_power_PowerManagerService.h"

	using android::hardware::Return;
	using android::hardware::Void;
	using android::hardware::power::V1_0::IPower;
	using android::hardware::power::V1_0::PowerHint;
	using android::hardware::power::V1_0::Feature;
	using android::String8;

	namespace android {

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

	static struct {
	jmethodID userActivityFromNative;
	} gPowerManagerServiceClassInfo;

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

	static jobject gPowerManagerServiceObj;
	sp<IPower> gPowerHal = nullptr;
	bool gPowerHalExists = true;
	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.
	bool getPowerHal() {
	if (gPowerHalExists && gPowerHal == nullptr) {
	gPowerHal = IPower::getService();
	if (gPowerHal != nullptr) {
	ALOGI("Loaded power HAL service");
	} else {
	ALOGI("Couldn't load power HAL service");
	gPowerHalExists = false;
	}
	}
	return gPowerHal != nullptr;
	}

	// 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. The caller must be holding gPowerHalMutex.
	static void processReturn(const Return<void> &ret, const char* functionName) {
	if (!ret.isOk()) {
	ALOGE("%s() failed: power HAL service not available.", functionName);
	gPowerHal = nullptr;
	}
	}

	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.
	gPowerHalMutex.lock();
	if (getPowerHal()) {
	Return<void> ret;
	ret = gPowerHal->powerHint(PowerHint::INTERACTION, 0);
	processReturn(ret, "powerHint");
	}
	gPowerHalMutex.unlock();

	}

	JNIEnv* env = AndroidRuntime::getJNIEnv();

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

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

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

	gPowerHalMutex.lock();
	getPowerHal();
	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) {
	std::lock_guard<std::mutex> lock(gPowerHalMutex);
	if (getPowerHal()) {
	String8 err("Excessive delay in setInteractive(%s) while turning screen %s");
	ALOGD_IF_SLOW(20, String8::format(err, enable ? "true" : "false", enable ? "on" : "off"));
	Return<void> ret = gPowerHal->setInteractive(enable);
	processReturn(ret, "setInteractive");
	}
	}

	static void nativeSetAutoSuspend(JNIEnv* /* env /, jclass / clazz */, jboolean enable) {
	if (enable) {
	ALOGD_IF_SLOW(100, "Excessive delay in autosuspend_enable() while turning screen off");
	autosuspend_enable();
	} else {
	ALOGD_IF_SLOW(100, "Excessive delay in autosuspend_disable() while turning screen on");
	autosuspend_disable();
	}
	}

	static void nativeSendPowerHint(JNIEnv *env, jclass clazz, jint hintId, jint data) {
	std::lock_guard<std::mutex> lock(gPowerHalMutex);
	if (getPowerHal()) {
	Return<void> ret = gPowerHal->powerHint((PowerHint)hintId, data);
	processReturn(ret, "powerHint");
	}
	}

	static void nativeSetFeature(JNIEnv *env, jclass clazz, jint featureId, jint data) {
	std::lock_guard<std::mutex> lock(gPowerHalMutex);
	if (getPowerHal()) {
	Return<void> ret = gPowerHal->setFeature((Feature)featureId, static_cast<bool>(data));
	processReturn(ret, "setFeature");
	}
	}

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

	static const JNINativeMethod gPowerManagerServiceMethods[] = {
	/* name, signature, funcPtr */
	{ "nativeInit", "()V",
	(void*) nativeInit },
	{ "nativeAcquireSuspendBlocker", "(Ljava/lang/String;)V",
	(void*) nativeAcquireSuspendBlocker },
	{ "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 */