android_os_UEventObserver.cpp revision 9266c558bf1d21ff647525ff99f7dadbca417309
1/* 2 * Copyright (C) 2008 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 "UEventObserver" 18#include "utils/Log.h" 19 20#include "hardware_legacy/uevent.h" 21#include "jni.h" 22#include "JNIHelp.h" 23#include "android_runtime/AndroidRuntime.h" 24 25namespace android 26{ 27 28static void 29android_os_UEventObserver_native_setup(JNIEnv *env, jclass clazz) 30{ 31 if (!uevent_init()) { 32 jniThrowException(env, "java/lang/RuntimeException", 33 "Unable to open socket for UEventObserver"); 34 } 35} 36 37static int 38android_os_UEventObserver_next_event(JNIEnv *env, jclass clazz, jbyteArray jbuffer) 39{ 40 int buf_sz = env->GetArrayLength(jbuffer); 41 char *buffer = (char*)env->GetByteArrayElements(jbuffer, NULL); 42 43 int length = uevent_next_event(buffer, buf_sz - 1); 44 45 env->ReleaseByteArrayElements(jbuffer, (jbyte*)buffer, 0); 46 47 return length; 48} 49 50static JNINativeMethod gMethods[] = { 51 {"native_setup", "()V", (void *)android_os_UEventObserver_native_setup}, 52 {"next_event", "([B)I", (void *)android_os_UEventObserver_next_event}, 53}; 54 55 56int register_android_os_UEventObserver(JNIEnv *env) 57{ 58 jclass clazz; 59 60 clazz = env->FindClass("android/os/UEventObserver"); 61 if (clazz == NULL) { 62 LOGE("Can't find android/os/UEventObserver"); 63 return -1; 64 } 65 66 return AndroidRuntime::registerNativeMethods(env, 67 "android/os/UEventObserver", gMethods, NELEM(gMethods)); 68} 69 70} // namespace android 71