1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "PowerManagerService-JNI" 18 19 //#define LOG_NDEBUG 0 20 21 #include "JNIHelp.h" 22 #include "jni.h" 23 24 #include <limits.h> 25 26 #include <android_runtime/AndroidRuntime.h> 27 #include <utils/Timers.h> 28 #include <surfaceflinger/ISurfaceComposer.h> 29 #include <surfaceflinger/SurfaceComposerClient.h> 30 31 #include "com_android_server_PowerManagerService.h" 32 33 namespace android { 34 35 // ---------------------------------------------------------------------------- 36 37 static struct { 38 jclass clazz; 39 40 jmethodID goToSleep; 41 jmethodID userActivity; 42 } gPowerManagerServiceClassInfo; 43 44 // ---------------------------------------------------------------------------- 45 46 static jobject gPowerManagerServiceObj; 47 48 static Mutex gPowerManagerLock; 49 static bool gScreenOn; 50 static bool gScreenBright; 51 52 static nsecs_t gLastEventTime[POWER_MANAGER_LAST_EVENT + 1]; 53 54 // Throttling interval for user activity calls. 55 static const nsecs_t MIN_TIME_BETWEEN_USERACTIVITIES = 500 * 1000000L; // 500ms 56 57 // ---------------------------------------------------------------------------- 58 59 static bool checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) { 60 if (env->ExceptionCheck()) { 61 LOGE("An exception was thrown by callback '%s'.", methodName); 62 LOGE_EX(env); 63 env->ExceptionClear(); 64 return true; 65 } 66 return false; 67 } 68 69 bool android_server_PowerManagerService_isScreenOn() { 70 AutoMutex _l(gPowerManagerLock); 71 return gScreenOn; 72 } 73 74 bool android_server_PowerManagerService_isScreenBright() { 75 AutoMutex _l(gPowerManagerLock); 76 return gScreenBright; 77 } 78 79 void android_server_PowerManagerService_userActivity(nsecs_t eventTime, int32_t eventType) { 80 if (gPowerManagerServiceObj) { 81 // Throttle calls into user activity by event type. 82 // We're a little conservative about argument checking here in case the caller 83 // passes in bad data which could corrupt system state. 84 if (eventType >= 0 && eventType <= POWER_MANAGER_LAST_EVENT) { 85 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); 86 if (eventTime > now) { 87 eventTime = now; 88 } 89 90 if (gLastEventTime[eventType] + MIN_TIME_BETWEEN_USERACTIVITIES > eventTime) { 91 return; 92 } 93 gLastEventTime[eventType] = eventTime; 94 } 95 96 JNIEnv* env = AndroidRuntime::getJNIEnv(); 97 98 env->CallVoidMethod(gPowerManagerServiceObj, gPowerManagerServiceClassInfo.userActivity, 99 nanoseconds_to_milliseconds(eventTime), false, eventType, false); 100 checkAndClearExceptionFromCallback(env, "userActivity"); 101 } 102 } 103 104 void android_server_PowerManagerService_goToSleep(nsecs_t eventTime) { 105 if (gPowerManagerServiceObj) { 106 JNIEnv* env = AndroidRuntime::getJNIEnv(); 107 108 env->CallVoidMethod(gPowerManagerServiceObj, gPowerManagerServiceClassInfo.goToSleep, 109 nanoseconds_to_milliseconds(eventTime)); 110 checkAndClearExceptionFromCallback(env, "goToSleep"); 111 } 112 } 113 114 // ---------------------------------------------------------------------------- 115 116 static void android_server_PowerManagerService_nativeInit(JNIEnv* env, jobject obj) { 117 gPowerManagerServiceObj = env->NewGlobalRef(obj); 118 } 119 120 static void android_server_PowerManagerService_nativeSetPowerState(JNIEnv* env, 121 jobject serviceObj, jboolean screenOn, jboolean screenBright) { 122 AutoMutex _l(gPowerManagerLock); 123 gScreenOn = screenOn; 124 gScreenBright = screenBright; 125 } 126 127 static void android_server_PowerManagerService_nativeStartSurfaceFlingerAnimation(JNIEnv* env, 128 jobject obj, jint mode) { 129 sp<ISurfaceComposer> s(ComposerService::getComposerService()); 130 s->turnElectronBeamOff(mode); 131 } 132 133 // ---------------------------------------------------------------------------- 134 135 static JNINativeMethod gPowerManagerServiceMethods[] = { 136 /* name, signature, funcPtr */ 137 { "nativeInit", "()V", 138 (void*) android_server_PowerManagerService_nativeInit }, 139 { "nativeSetPowerState", "(ZZ)V", 140 (void*) android_server_PowerManagerService_nativeSetPowerState }, 141 { "nativeStartSurfaceFlingerAnimation", "(I)V", 142 (void*) android_server_PowerManagerService_nativeStartSurfaceFlingerAnimation }, 143 }; 144 145 #define FIND_CLASS(var, className) \ 146 var = env->FindClass(className); \ 147 LOG_FATAL_IF(! var, "Unable to find class " className); \ 148 var = jclass(env->NewGlobalRef(var)); 149 150 #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \ 151 var = env->GetMethodID(clazz, methodName, methodDescriptor); \ 152 LOG_FATAL_IF(! var, "Unable to find method " methodName); 153 154 #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \ 155 var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \ 156 LOG_FATAL_IF(! var, "Unable to find field " fieldName); 157 158 int register_android_server_PowerManagerService(JNIEnv* env) { 159 int res = jniRegisterNativeMethods(env, "com/android/server/PowerManagerService", 160 gPowerManagerServiceMethods, NELEM(gPowerManagerServiceMethods)); 161 LOG_FATAL_IF(res < 0, "Unable to register native methods."); 162 163 // Callbacks 164 165 FIND_CLASS(gPowerManagerServiceClassInfo.clazz, "com/android/server/PowerManagerService"); 166 167 GET_METHOD_ID(gPowerManagerServiceClassInfo.goToSleep, gPowerManagerServiceClassInfo.clazz, 168 "goToSleep", "(J)V"); 169 170 GET_METHOD_ID(gPowerManagerServiceClassInfo.userActivity, gPowerManagerServiceClassInfo.clazz, 171 "userActivity", "(JZIZ)V"); 172 173 // Initialize 174 for (int i = 0; i < POWER_MANAGER_LAST_EVENT; i++) { 175 gLastEventTime[i] = LLONG_MIN; 176 } 177 gScreenOn = true; 178 gScreenBright = true; 179 return 0; 180 } 181 182 } /* namespace android */ 183