com_android_server_power_PowerManagerService.cpp revision 80cd819a0488d2ce2354e0f11a59e4f01d82ed54 
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 <gui/ISurfaceComposer.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 <cutils/android_reboot.h>
37#include <suspend/autosuspend.h>
38
39#include <private/gui/ComposerService.h>
40
41#include "com_android_server_power_PowerManagerService.h"
42
43namespace android {
44
45// ----------------------------------------------------------------------------
46
47static struct {
48    jmethodID wakeUpFromNative;
49    jmethodID goToSleepFromNative;
50    jmethodID userActivityFromNative;
51} gPowerManagerServiceClassInfo;
52
53// ----------------------------------------------------------------------------
54
55static jobject gPowerManagerServiceObj;
56static struct power_module* gPowerModule;
57
58static Mutex gPowerManagerLock;
59static bool gScreenOn;
60static bool gScreenBright;
61
62static nsecs_t gLastEventTime[USER_ACTIVITY_EVENT_LAST + 1];
63
64// Throttling interval for user activity calls.
65static const nsecs_t MIN_TIME_BETWEEN_USERACTIVITIES = 500 * 1000000L; // 500ms
66
67// ----------------------------------------------------------------------------
68
69static bool checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) {
70    if (env->ExceptionCheck()) {
71        ALOGE("An exception was thrown by callback '%s'.", methodName);
72        LOGE_EX(env);
73        env->ExceptionClear();
74        return true;
75    }
76    return false;
77}
78
79bool android_server_PowerManagerService_isScreenOn() {
80    AutoMutex _l(gPowerManagerLock);
81    return gScreenOn;
82}
83
84bool android_server_PowerManagerService_isScreenBright() {
85    AutoMutex _l(gPowerManagerLock);
86    return gScreenBright;
87}
88
89void android_server_PowerManagerService_userActivity(nsecs_t eventTime, int32_t eventType) {
90    // Tell the power HAL when user activity occurs.
91    if (gPowerModule && gPowerModule->powerHint) {
92        gPowerModule->powerHint(gPowerModule, POWER_HINT_INTERACTION, NULL);
93    }
94
95    if (gPowerManagerServiceObj) {
96        // Throttle calls into user activity by event type.
97        // We're a little conservative about argument checking here in case the caller
98        // passes in bad data which could corrupt system state.
99        if (eventType >= 0 && eventType <= USER_ACTIVITY_EVENT_LAST) {
100            nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
101            if (eventTime > now) {
102                eventTime = now;
103            }
104
105            if (gLastEventTime[eventType] + MIN_TIME_BETWEEN_USERACTIVITIES > eventTime) {
106                return;
107            }
108            gLastEventTime[eventType] = eventTime;
109        }
110
111        JNIEnv* env = AndroidRuntime::getJNIEnv();
112
113        env->CallVoidMethod(gPowerManagerServiceObj,
114                gPowerManagerServiceClassInfo.userActivityFromNative,
115                nanoseconds_to_milliseconds(eventTime), eventType, 0);
116        checkAndClearExceptionFromCallback(env, "userActivityFromNative");
117    }
118}
119
120void android_server_PowerManagerService_wakeUp(nsecs_t eventTime) {
121    if (gPowerManagerServiceObj) {
122        JNIEnv* env = AndroidRuntime::getJNIEnv();
123
124        env->CallVoidMethod(gPowerManagerServiceObj,
125                gPowerManagerServiceClassInfo.wakeUpFromNative,
126                nanoseconds_to_milliseconds(eventTime));
127        checkAndClearExceptionFromCallback(env, "wakeUpFromNative");
128    }
129}
130
131void android_server_PowerManagerService_goToSleep(nsecs_t eventTime) {
132    if (gPowerManagerServiceObj) {
133        JNIEnv* env = AndroidRuntime::getJNIEnv();
134
135        env->CallVoidMethod(gPowerManagerServiceObj,
136                gPowerManagerServiceClassInfo.goToSleepFromNative,
137                nanoseconds_to_milliseconds(eventTime), 0);
138        checkAndClearExceptionFromCallback(env, "goToSleepFromNative");
139    }
140}
141
142// ----------------------------------------------------------------------------
143
144static void nativeInit(JNIEnv* env, jobject obj) {
145    gPowerManagerServiceObj = env->NewGlobalRef(obj);
146
147    status_t err = hw_get_module(POWER_HARDWARE_MODULE_ID,
148            (hw_module_t const**)&gPowerModule);
149    if (!err) {
150        gPowerModule->init(gPowerModule);
151    } else {
152        ALOGE("Couldn't load %s module (%s)", POWER_HARDWARE_MODULE_ID, strerror(-err));
153    }
154}
155
156static void nativeSetPowerState(JNIEnv* env,
157        jclass clazz, jboolean screenOn, jboolean screenBright) {
158    AutoMutex _l(gPowerManagerLock);
159    gScreenOn = screenOn;
160    gScreenBright = screenBright;
161}
162
163static void nativeAcquireSuspendBlocker(JNIEnv *env, jclass clazz, jstring nameStr) {
164    ScopedUtfChars name(env, nameStr);
165    acquire_wake_lock(PARTIAL_WAKE_LOCK, name.c_str());
166}
167
168static void nativeReleaseSuspendBlocker(JNIEnv *env, jclass clazz, jstring nameStr) {
169    ScopedUtfChars name(env, nameStr);
170    release_wake_lock(name.c_str());
171}
172
173static void nativeSetScreenState(JNIEnv *env, jclass clazz, jboolean on) {
174    sp<ISurfaceComposer> s(ComposerService::getComposerService());
175    if (on) {
176        {
177            ALOGD_IF_SLOW(100, "Excessive delay in autosuspend_disable() while turning screen on");
178            autosuspend_disable();
179        }
180
181        if (gPowerModule) {
182            ALOGD_IF_SLOW(20, "Excessive delay in setInteractive(true) while turning screen on");
183            gPowerModule->setInteractive(gPowerModule, true);
184        }
185
186        {
187            ALOGD_IF_SLOW(100, "Excessive delay in unblank() while turning screen on");
188            s->unblank();
189        }
190    } else {
191        {
192            ALOGD_IF_SLOW(100, "Excessive delay in blank() while turning screen off");
193            s->blank();
194        }
195
196        if (gPowerModule) {
197            ALOGD_IF_SLOW(20, "Excessive delay in setInteractive(false) while turning screen off");
198            gPowerModule->setInteractive(gPowerModule, false);
199        }
200
201        {
202            ALOGD_IF_SLOW(100, "Excessive delay in autosuspend_enable() while turning screen off");
203            autosuspend_enable();
204        }
205    }
206}
207
208static void nativeShutdown(JNIEnv *env, jclass clazz) {
209    android_reboot(ANDROID_RB_POWEROFF, 0, 0);
210}
211
212static void nativeReboot(JNIEnv *env, jclass clazz, jstring reason) {
213    if (reason == NULL) {
214        android_reboot(ANDROID_RB_RESTART, 0, 0);
215    } else {
216        const char *chars = env->GetStringUTFChars(reason, NULL);
217        android_reboot(ANDROID_RB_RESTART2, 0, (char *) chars);
218        env->ReleaseStringUTFChars(reason, chars);  // In case it fails.
219    }
220    jniThrowIOException(env, errno);
221}
222
223
224// ----------------------------------------------------------------------------
225
226static JNINativeMethod gPowerManagerServiceMethods[] = {
227    /* name, signature, funcPtr */
228    { "nativeInit", "()V",
229            (void*) nativeInit },
230    { "nativeSetPowerState", "(ZZ)V",
231            (void*) nativeSetPowerState },
232    { "nativeAcquireSuspendBlocker", "(Ljava/lang/String;)V",
233            (void*) nativeAcquireSuspendBlocker },
234    { "nativeReleaseSuspendBlocker", "(Ljava/lang/String;)V",
235            (void*) nativeReleaseSuspendBlocker },
236    { "nativeSetScreenState", "(Z)V",
237            (void*) nativeSetScreenState },
238    { "nativeShutdown", "()V",
239            (void*) nativeShutdown },
240    { "nativeReboot", "(Ljava/lang/String;)V",
241            (void*) nativeReboot },
242};
243
244#define FIND_CLASS(var, className) \
245        var = env->FindClass(className); \
246        LOG_FATAL_IF(! var, "Unable to find class " className);
247
248#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
249        var = env->GetMethodID(clazz, methodName, methodDescriptor); \
250        LOG_FATAL_IF(! var, "Unable to find method " methodName);
251
252#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
253        var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
254        LOG_FATAL_IF(! var, "Unable to find field " fieldName);
255
256int register_android_server_PowerManagerService(JNIEnv* env) {
257    int res = jniRegisterNativeMethods(env, "com/android/server/power/PowerManagerService",
258            gPowerManagerServiceMethods, NELEM(gPowerManagerServiceMethods));
259    LOG_FATAL_IF(res < 0, "Unable to register native methods.");
260
261    // Callbacks
262
263    jclass clazz;
264    FIND_CLASS(clazz, "com/android/server/power/PowerManagerService");
265
266    GET_METHOD_ID(gPowerManagerServiceClassInfo.wakeUpFromNative, clazz,
267            "wakeUpFromNative", "(J)V");
268
269    GET_METHOD_ID(gPowerManagerServiceClassInfo.goToSleepFromNative, clazz,
270            "goToSleepFromNative", "(JI)V");
271
272    GET_METHOD_ID(gPowerManagerServiceClassInfo.userActivityFromNative, clazz,
273            "userActivityFromNative", "(JII)V");
274
275    // Initialize
276    for (int i = 0; i <= USER_ACTIVITY_EVENT_LAST; i++) {
277        gLastEventTime[i] = LLONG_MIN;
278    }
279    gScreenOn = true;
280    gScreenBright = true;
281    gPowerManagerServiceObj = NULL;
282    gPowerModule = NULL;
283    return 0;
284}
285
286} /* namespace android */
287