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-rw-r--r--services/jni/com_android_server_PowerManagerService.cpp182
1 files changed, 182 insertions, 0 deletions
diff --git a/services/jni/com_android_server_PowerManagerService.cpp b/services/jni/com_android_server_PowerManagerService.cpp
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+++ b/services/jni/com_android_server_PowerManagerService.cpp
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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 {
+ jclass clazz;
+
+ 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); \
+ var = jclass(env->NewGlobalRef(var));
+
+#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
+
+ FIND_CLASS(gPowerManagerServiceClassInfo.clazz, "com/android/server/PowerManagerService");
+
+ GET_METHOD_ID(gPowerManagerServiceClassInfo.goToSleep, gPowerManagerServiceClassInfo.clazz,
+ "goToSleep", "(J)V");
+
+ GET_METHOD_ID(gPowerManagerServiceClassInfo.userActivity, gPowerManagerServiceClassInfo.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 */