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/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#include "wa-inc/sensor.h"
#include "sensor_api.h"
typedef struct _sensor {
struct _sensor *next;
char *name;
uint32 handle;
void (*sensor_callback)(sensor_t, attr_container_t *, void *);
void *user_data;
} sensor;
static sensor_t g_sensors = NULL;
sensor_t
sensor_open(const char *name, int index,
sensor_event_handler_f sensor_event_handler, void *user_data)
{
uint32 id = wasm_sensor_open(name, index);
if (id == -1)
return NULL;
// create local node for holding the user callback
sensor_t sensor = (sensor_t)malloc(sizeof(struct _sensor));
if (sensor == NULL)
return NULL;
memset(sensor, 0, sizeof(struct _sensor));
sensor->handle = id;
sensor->name = strdup(name);
sensor->user_data = user_data;
sensor->sensor_callback = sensor_event_handler;
if (!sensor->name) {
free(sensor);
return NULL;
}
if (g_sensors == NULL) {
g_sensors = sensor;
}
else {
sensor->next = g_sensors;
g_sensors = sensor;
}
return sensor;
}
bool
sensor_config_with_attr_container(sensor_t sensor, attr_container_t *cfg)
{
char *buffer = (char *)cfg;
int len = attr_container_get_serialize_length(cfg);
return wasm_sensor_config_with_attr_container(sensor->handle, buffer, len);
}
bool
sensor_config(sensor_t sensor, int interval, int bit_cfg, int delay)
{
bool ret = wasm_sensor_config(sensor->handle, interval, bit_cfg, delay);
return ret;
}
bool
sensor_close(sensor_t sensor)
{
wasm_sensor_close(sensor->handle);
// remove local node
sensor_t s = g_sensors;
sensor_t prev = NULL;
while (s) {
if (s == sensor) {
if (prev == NULL) {
g_sensors = s->next;
}
else {
prev->next = s->next;
}
free(s->name);
free(s);
return true;
}
else {
prev = s;
s = s->next;
}
}
return false;
}
/*
*
* API for native layer to callback for sensor events
*
*/
void
on_sensor_event(uint32 sensor_id, char *buffer, int len)
{
attr_container_t *sensor_data = (attr_container_t *)buffer;
// lookup the sensor and call the handlers
sensor_t s = g_sensors;
sensor_t prev = NULL;
while (s) {
if (s->handle == sensor_id) {
s->sensor_callback(s, sensor_data, s->user_data);
break;
}
s = s->next;
}
}
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