com_android_server_power_PowerManagerService.cpp revision 4e5c089ef3e62e7f658e71c0be262d09bd3e399b
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 <ScopedUtfChars.h> 25 26#include <limits.h> 27 28#include <android_runtime/AndroidRuntime.h> 29#include <android_runtime/Log.h> 30#include <utils/Timers.h> 31#include <utils/misc.h> 32#include <utils/String8.h> 33#include <utils/Log.h> 34#include <hardware/power.h> 35#include <hardware_legacy/power.h> 36#include <suspend/autosuspend.h> 37 38#include "com_android_server_power_PowerManagerService.h" 39 40namespace android { 41 42// ---------------------------------------------------------------------------- 43 44static struct { 45 jmethodID userActivityFromNative; 46} gPowerManagerServiceClassInfo; 47 48// ---------------------------------------------------------------------------- 49 50static jobject gPowerManagerServiceObj; 51static struct power_module* gPowerModule; 52 53static nsecs_t gLastEventTime[USER_ACTIVITY_EVENT_LAST + 1]; 54 55// Throttling interval for user activity calls. 56static const nsecs_t MIN_TIME_BETWEEN_USERACTIVITIES = 500 * 1000000L; // 500ms 57 58// ---------------------------------------------------------------------------- 59 60static bool checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) { 61 if (env->ExceptionCheck()) { 62 ALOGE("An exception was thrown by callback '%s'.", methodName); 63 LOGE_EX(env); 64 env->ExceptionClear(); 65 return true; 66 } 67 return false; 68} 69 70void android_server_PowerManagerService_userActivity(nsecs_t eventTime, int32_t eventType) { 71 // Tell the power HAL when user activity occurs. 72 if (gPowerModule && gPowerModule->powerHint) { 73 gPowerModule->powerHint(gPowerModule, POWER_HINT_INTERACTION, NULL); 74 } 75 76 if (gPowerManagerServiceObj) { 77 // Throttle calls into user activity by event type. 78 // We're a little conservative about argument checking here in case the caller 79 // passes in bad data which could corrupt system state. 80 if (eventType >= 0 && eventType <= USER_ACTIVITY_EVENT_LAST) { 81 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); 82 if (eventTime > now) { 83 eventTime = now; 84 } 85 86 if (gLastEventTime[eventType] + MIN_TIME_BETWEEN_USERACTIVITIES > eventTime) { 87 return; 88 } 89 gLastEventTime[eventType] = eventTime; 90 } 91 92 JNIEnv* env = AndroidRuntime::getJNIEnv(); 93 94 env->CallVoidMethod(gPowerManagerServiceObj, 95 gPowerManagerServiceClassInfo.userActivityFromNative, 96 nanoseconds_to_milliseconds(eventTime), eventType, 0); 97 checkAndClearExceptionFromCallback(env, "userActivityFromNative"); 98 } 99} 100 101// ---------------------------------------------------------------------------- 102 103static void nativeInit(JNIEnv* env, jobject obj) { 104 gPowerManagerServiceObj = env->NewGlobalRef(obj); 105 106 status_t err = hw_get_module(POWER_HARDWARE_MODULE_ID, 107 (hw_module_t const**)&gPowerModule); 108 if (!err) { 109 gPowerModule->init(gPowerModule); 110 } else { 111 ALOGE("Couldn't load %s module (%s)", POWER_HARDWARE_MODULE_ID, strerror(-err)); 112 } 113} 114 115static void nativeAcquireSuspendBlocker(JNIEnv *env, jclass clazz, jstring nameStr) { 116 ScopedUtfChars name(env, nameStr); 117 acquire_wake_lock(PARTIAL_WAKE_LOCK, name.c_str()); 118} 119 120static void nativeReleaseSuspendBlocker(JNIEnv *env, jclass clazz, jstring nameStr) { 121 ScopedUtfChars name(env, nameStr); 122 release_wake_lock(name.c_str()); 123} 124 125static void nativeSetInteractive(JNIEnv *env, jclass clazz, jboolean enable) { 126 if (gPowerModule) { 127 if (enable) { 128 ALOGD_IF_SLOW(20, "Excessive delay in setInteractive(true) while turning screen on"); 129 gPowerModule->setInteractive(gPowerModule, true); 130 } else { 131 ALOGD_IF_SLOW(20, "Excessive delay in setInteractive(false) while turning screen off"); 132 gPowerModule->setInteractive(gPowerModule, false); 133 } 134 } 135} 136 137static void nativeSetAutoSuspend(JNIEnv *env, jclass clazz, jboolean enable) { 138 if (enable) { 139 ALOGD_IF_SLOW(100, "Excessive delay in autosuspend_enable() while turning screen off"); 140 autosuspend_enable(); 141 } else { 142 ALOGD_IF_SLOW(100, "Excessive delay in autosuspend_disable() while turning screen on"); 143 autosuspend_disable(); 144 } 145} 146 147static void nativeSendPowerHint(JNIEnv *env, jclass clazz, jint hintId, jint data) { 148 int data_param = data; 149 150 if (gPowerModule && gPowerModule->powerHint) { 151 if(data) 152 gPowerModule->powerHint(gPowerModule, (power_hint_t)hintId, &data_param); 153 else { 154 gPowerModule->powerHint(gPowerModule, (power_hint_t)hintId, NULL); 155 } 156 } 157} 158 159// ---------------------------------------------------------------------------- 160 161static JNINativeMethod gPowerManagerServiceMethods[] = { 162 /* name, signature, funcPtr */ 163 { "nativeInit", "()V", 164 (void*) nativeInit }, 165 { "nativeAcquireSuspendBlocker", "(Ljava/lang/String;)V", 166 (void*) nativeAcquireSuspendBlocker }, 167 { "nativeReleaseSuspendBlocker", "(Ljava/lang/String;)V", 168 (void*) nativeReleaseSuspendBlocker }, 169 { "nativeSetInteractive", "(Z)V", 170 (void*) nativeSetInteractive }, 171 { "nativeSetAutoSuspend", "(Z)V", 172 (void*) nativeSetAutoSuspend }, 173 { "nativeSendPowerHint", "(II)V", 174 (void*) nativeSendPowerHint }, 175}; 176 177#define FIND_CLASS(var, className) \ 178 var = env->FindClass(className); \ 179 LOG_FATAL_IF(! var, "Unable to find class " className); 180 181#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \ 182 var = env->GetMethodID(clazz, methodName, methodDescriptor); \ 183 LOG_FATAL_IF(! var, "Unable to find method " methodName); 184 185#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \ 186 var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \ 187 LOG_FATAL_IF(! var, "Unable to find field " fieldName); 188 189int register_android_server_PowerManagerService(JNIEnv* env) { 190 int res = jniRegisterNativeMethods(env, "com/android/server/power/PowerManagerService", 191 gPowerManagerServiceMethods, NELEM(gPowerManagerServiceMethods)); 192 LOG_FATAL_IF(res < 0, "Unable to register native methods."); 193 194 // Callbacks 195 196 jclass clazz; 197 FIND_CLASS(clazz, "com/android/server/power/PowerManagerService"); 198 199 GET_METHOD_ID(gPowerManagerServiceClassInfo.userActivityFromNative, clazz, 200 "userActivityFromNative", "(JII)V"); 201 202 // Initialize 203 for (int i = 0; i <= USER_ACTIVITY_EVENT_LAST; i++) { 204 gLastEventTime[i] = LLONG_MIN; 205 } 206 gPowerManagerServiceObj = NULL; 207 gPowerModule = NULL; 208 return 0; 209} 210 211} /* namespace android */ 212