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/*
* Copyright 2008, 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 "SensorService"
#define LOG_NDEBUG 0
#include "utils/Log.h"
#include <hardware/sensors.h>
#include "jni.h"
#include "JNIHelp.h"
namespace android {
static struct file_descriptor_offsets_t
{
jclass mClass;
jmethodID mConstructor;
jfieldID mDescriptor;
} gFileDescriptorOffsets;
static struct parcel_file_descriptor_offsets_t
{
jclass mClass;
jmethodID mConstructor;
} gParcelFileDescriptorOffsets;
static struct bundle_descriptor_offsets_t
{
jclass mClass;
jmethodID mConstructor;
jmethodID mPutIntArray;
jmethodID mPutParcelableArray;
} gBundleOffsets;
/*
* The method below are not thread-safe and not intended to be
*/
static sensors_control_device_t* sSensorDevice = 0;
static jint
android_init(JNIEnv *env, jclass clazz)
{
sensors_module_t* module;
if (hw_get_module(SENSORS_HARDWARE_MODULE_ID, (const hw_module_t**)&module) == 0) {
if (sensors_control_open(&module->common, &sSensorDevice) == 0) {
const struct sensor_t* list;
int count = module->get_sensors_list(module, &list);
return count;
}
}
return 0;
}
static jobject
android_open(JNIEnv *env, jclass clazz)
{
native_handle_t* handle = sSensorDevice->open_data_source(sSensorDevice);
if (!handle) {
return NULL;
}
// new Bundle()
jobject bundle = env->NewObject(
gBundleOffsets.mClass,
gBundleOffsets.mConstructor);
if (handle->numFds > 0) {
jobjectArray fdArray = env->NewObjectArray(handle->numFds,
gParcelFileDescriptorOffsets.mClass, NULL);
for (int i = 0; i < handle->numFds; i++) {
// new FileDescriptor()
jobject fd = env->NewObject(gFileDescriptorOffsets.mClass,
gFileDescriptorOffsets.mConstructor);
env->SetIntField(fd, gFileDescriptorOffsets.mDescriptor, handle->data[i]);
// new ParcelFileDescriptor()
jobject pfd = env->NewObject(gParcelFileDescriptorOffsets.mClass,
gParcelFileDescriptorOffsets.mConstructor, fd);
env->SetObjectArrayElement(fdArray, i, pfd);
}
// bundle.putParcelableArray("fds", fdArray);
env->CallVoidMethod(bundle, gBundleOffsets.mPutParcelableArray,
env->NewStringUTF("fds"), fdArray);
}
if (handle->numInts > 0) {
jintArray intArray = env->NewIntArray(handle->numInts);
env->SetIntArrayRegion(intArray, 0, handle->numInts, &handle->data[handle->numInts]);
// bundle.putIntArray("ints", intArray);
env->CallVoidMethod(bundle, gBundleOffsets.mPutIntArray,
env->NewStringUTF("ints"), intArray);
}
// delete the file handle, but don't close any file descriptors
native_handle_delete(handle);
return bundle;
}
static jboolean
android_activate(JNIEnv *env, jclass clazz, jint sensor, jboolean activate)
{
int active = sSensorDevice->activate(sSensorDevice, sensor, activate);
return (active<0) ? false : true;
}
static jint
android_set_delay(JNIEnv *env, jclass clazz, jint ms)
{
return sSensorDevice->set_delay(sSensorDevice, ms);
}
static jint
android_data_wake(JNIEnv *env, jclass clazz)
{
int res = sSensorDevice->wake(sSensorDevice);
return res;
}
static JNINativeMethod gMethods[] = {
{"_sensors_control_init", "()I", (void*) android_init },
{"_sensors_control_open", "()Landroid/os/Bundle;", (void*) android_open },
{"_sensors_control_activate", "(IZ)Z", (void*) android_activate },
{"_sensors_control_wake", "()I", (void*) android_data_wake },
{"_sensors_control_set_delay","(I)I", (void*) android_set_delay },
};
int register_android_server_SensorService(JNIEnv *env)
{
jclass clazz;
clazz = env->FindClass("java/io/FileDescriptor");
gFileDescriptorOffsets.mClass = (jclass)env->NewGlobalRef(clazz);
gFileDescriptorOffsets.mConstructor = env->GetMethodID(clazz, "<init>", "()V");
gFileDescriptorOffsets.mDescriptor = env->GetFieldID(clazz, "descriptor", "I");
clazz = env->FindClass("android/os/ParcelFileDescriptor");
gParcelFileDescriptorOffsets.mClass = (jclass) env->NewGlobalRef(clazz);
gParcelFileDescriptorOffsets.mConstructor = env->GetMethodID(clazz, "<init>",
"(Ljava/io/FileDescriptor;)V");
clazz = env->FindClass("android/os/Bundle");
gBundleOffsets.mClass = (jclass) env->NewGlobalRef(clazz);
gBundleOffsets.mConstructor = env->GetMethodID(clazz, "<init>", "()V");
gBundleOffsets.mPutIntArray = env->GetMethodID(clazz, "putIntArray", "(Ljava/lang/String;[I)V");
gBundleOffsets.mPutParcelableArray = env->GetMethodID(clazz, "putParcelableArray",
"(Ljava/lang/String;[Landroid/os/Parcelable;)V");
return jniRegisterNativeMethods(env, "com/android/server/SensorService",
gMethods, NELEM(gMethods));
}
}; // namespace android
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