123 lines
3.0 KiB
C++
123 lines
3.0 KiB
C++
|
/*
|
||
|
|
* Copyright (C) 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <math.h>
|
||
|
|
#include <poll.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <dirent.h>
|
||
|
|
#include <sys/select.h>
|
||
|
|
|
||
|
|
#include <cutils/log.h>
|
||
|
|
|
||
|
|
#include <linux/input.h>
|
||
|
|
|
||
|
|
#include "SensorBase.h"
|
||
|
|
|
||
|
|
/*****************************************************************************/
|
||
|
|
|
||
|
|
SensorBase::SensorBase(
|
||
|
|
const char* dev_name,
|
||
|
|
const char* data_name)
|
||
|
|
: dev_name(dev_name), data_name(data_name),
|
||
|
|
dev_fd(-1), data_fd(-1)
|
||
|
|
{
|
||
|
|
data_fd = openInput(data_name);
|
||
|
|
}
|
||
|
|
|
||
|
|
SensorBase::~SensorBase() {
|
||
|
|
if (data_fd >= 0) {
|
||
|
|
close(data_fd);
|
||
|
|
}
|
||
|
|
if (dev_fd >= 0) {
|
||
|
|
close(dev_fd);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int SensorBase::open_device() {
|
||
|
|
if (dev_fd<0 && dev_name) {
|
||
|
|
dev_fd = open(dev_name, O_RDONLY);
|
||
|
|
LOGE_IF(dev_fd<0, "Couldn't open %s (%s)", dev_name, strerror(errno));
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int SensorBase::close_device() {
|
||
|
|
if (dev_fd >= 0) {
|
||
|
|
close(dev_fd);
|
||
|
|
dev_fd = -1;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int SensorBase::getFd() const {
|
||
|
|
return data_fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
int SensorBase::setDelay(int32_t handle, int64_t ns) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool SensorBase::hasPendingEvents() const {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
int64_t SensorBase::getTimestamp() {
|
||
|
|
struct timespec t;
|
||
|
|
t.tv_sec = t.tv_nsec = 0;
|
||
|
|
clock_gettime(CLOCK_MONOTONIC, &t);
|
||
|
|
return int64_t(t.tv_sec)*1000000000LL + t.tv_nsec;
|
||
|
|
}
|
||
|
|
|
||
|
|
int SensorBase::openInput(const char* inputName) {
|
||
|
|
int fd = -1;
|
||
|
|
const char *dirname = "/dev/input";
|
||
|
|
char devname[PATH_MAX];
|
||
|
|
char *filename;
|
||
|
|
DIR *dir;
|
||
|
|
struct dirent *de;
|
||
|
|
dir = opendir(dirname);
|
||
|
|
if(dir == NULL)
|
||
|
|
return -1;
|
||
|
|
strcpy(devname, dirname);
|
||
|
|
filename = devname + strlen(devname);
|
||
|
|
*filename++ = '/';
|
||
|
|
while((de = readdir(dir))) {
|
||
|
|
if(de->d_name[0] == '.' &&
|
||
|
|
(de->d_name[1] == '\0' ||
|
||
|
|
(de->d_name[1] == '.' && de->d_name[2] == '\0')))
|
||
|
|
continue;
|
||
|
|
strcpy(filename, de->d_name);
|
||
|
|
fd = open(devname, O_RDONLY);
|
||
|
|
if (fd>=0) {
|
||
|
|
char name[80];
|
||
|
|
if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) {
|
||
|
|
name[0] = '\0';
|
||
|
|
}
|
||
|
|
if (!strcmp(name, inputName)) {
|
||
|
|
break;
|
||
|
|
} else {
|
||
|
|
close(fd);
|
||
|
|
fd = -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
closedir(dir);
|
||
|
|
LOGE_IF(fd<0, "couldn't find '%s' input device", inputName);
|
||
|
|
return fd;
|
||
|
|
}
|