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
25 namespace android
26 {
27
28 static void
android_os_UEventObserver_native_setup(JNIEnv * env,jclass clazz)29 android_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
37 static int
android_os_UEventObserver_next_event(JNIEnv * env,jclass clazz,jbyteArray jbuffer)38 android_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
50 static 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
register_android_os_UEventObserver(JNIEnv * env)56 int 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