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/*
* 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 "JNIHelp.h"
#include "jni.h"
#include <limits.h>
#include <android_runtime/AndroidRuntime.h>
#include <utils/Timers.h>
#include <surfaceflinger/ISurfaceComposer.h>
#include <surfaceflinger/SurfaceComposerClient.h>
#include "com_android_server_PowerManagerService.h"
namespace android {
// ----------------------------------------------------------------------------
static struct {
jmethodID goToSleep;
jmethodID userActivity;
} gPowerManagerServiceClassInfo;
// ----------------------------------------------------------------------------
static jobject gPowerManagerServiceObj;
static Mutex gPowerManagerLock;
static bool gScreenOn;
static bool gScreenBright;
static nsecs_t gLastEventTime[POWER_MANAGER_LAST_EVENT + 1];
// Throttling interval for user activity calls.
static const nsecs_t MIN_TIME_BETWEEN_USERACTIVITIES = 500 * 1000000L; // 500ms
// ----------------------------------------------------------------------------
static bool checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) {
if (env->ExceptionCheck()) {
LOGE("An exception was thrown by callback '%s'.", methodName);
LOGE_EX(env);
env->ExceptionClear();
return true;
}
return false;
}
bool android_server_PowerManagerService_isScreenOn() {
AutoMutex _l(gPowerManagerLock);
return gScreenOn;
}
bool android_server_PowerManagerService_isScreenBright() {
AutoMutex _l(gPowerManagerLock);
return gScreenBright;
}
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 <= POWER_MANAGER_LAST_EVENT) {
nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
if (eventTime > now) {
eventTime = now;
}
if (gLastEventTime[eventType] + MIN_TIME_BETWEEN_USERACTIVITIES > eventTime) {
return;
}
gLastEventTime[eventType] = eventTime;
}
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->CallVoidMethod(gPowerManagerServiceObj, gPowerManagerServiceClassInfo.userActivity,
nanoseconds_to_milliseconds(eventTime), false, eventType, false);
checkAndClearExceptionFromCallback(env, "userActivity");
}
}
void android_server_PowerManagerService_goToSleep(nsecs_t eventTime) {
if (gPowerManagerServiceObj) {
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->CallVoidMethod(gPowerManagerServiceObj, gPowerManagerServiceClassInfo.goToSleep,
nanoseconds_to_milliseconds(eventTime));
checkAndClearExceptionFromCallback(env, "goToSleep");
}
}
// ----------------------------------------------------------------------------
static void android_server_PowerManagerService_nativeInit(JNIEnv* env, jobject obj) {
gPowerManagerServiceObj = env->NewGlobalRef(obj);
}
static void android_server_PowerManagerService_nativeSetPowerState(JNIEnv* env,
jobject serviceObj, jboolean screenOn, jboolean screenBright) {
AutoMutex _l(gPowerManagerLock);
gScreenOn = screenOn;
gScreenBright = screenBright;
}
static void android_server_PowerManagerService_nativeStartSurfaceFlingerAnimation(JNIEnv* env,
jobject obj, jint mode) {
sp<ISurfaceComposer> s(ComposerService::getComposerService());
s->turnElectronBeamOff(mode);
}
// ----------------------------------------------------------------------------
static JNINativeMethod gPowerManagerServiceMethods[] = {
/* name, signature, funcPtr */
{ "nativeInit", "()V",
(void*) android_server_PowerManagerService_nativeInit },
{ "nativeSetPowerState", "(ZZ)V",
(void*) android_server_PowerManagerService_nativeSetPowerState },
{ "nativeStartSurfaceFlingerAnimation", "(I)V",
(void*) android_server_PowerManagerService_nativeStartSurfaceFlingerAnimation },
};
#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/PowerManagerService",
gPowerManagerServiceMethods, NELEM(gPowerManagerServiceMethods));
LOG_FATAL_IF(res < 0, "Unable to register native methods.");
// Callbacks
jclass clazz;
FIND_CLASS(clazz, "com/android/server/PowerManagerService");
GET_METHOD_ID(gPowerManagerServiceClassInfo.goToSleep, clazz,
"goToSleep", "(J)V");
GET_METHOD_ID(gPowerManagerServiceClassInfo.userActivity, clazz,
"userActivity", "(JZIZ)V");
// Initialize
for (int i = 0; i < POWER_MANAGER_LAST_EVENT; i++) {
gLastEventTime[i] = LLONG_MIN;
}
gScreenOn = true;
gScreenBright = true;
return 0;
}
} /* namespace android */
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