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// SPDX-License-Identifier: LGPL-2.1-or-later
// SPDX-FileCopyrightText: 2021 Bartosz Golaszewski <brgl@bgdev.pl>
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "internal.h"
struct gpiod_info_event {
enum gpiod_info_event_type event_type;
uint64_t timestamp;
struct gpiod_line_info *info;
};
struct gpiod_info_event *
gpiod_info_event_from_uapi(struct gpio_v2_line_info_changed *uapi_evt)
{
struct gpiod_info_event *event;
event = malloc(sizeof(*event));
if (!event)
return NULL;
memset(event, 0, sizeof(*event));
event->timestamp = uapi_evt->timestamp_ns;
switch (uapi_evt->event_type) {
case GPIOLINE_CHANGED_REQUESTED:
event->event_type = GPIOD_INFO_EVENT_LINE_REQUESTED;
break;
case GPIOLINE_CHANGED_RELEASED:
event->event_type = GPIOD_INFO_EVENT_LINE_RELEASED;
break;
case GPIOLINE_CHANGED_CONFIG:
event->event_type = GPIOD_INFO_EVENT_LINE_CONFIG_CHANGED;
break;
default:
/* Can't happen unless there's a bug in the kernel. */
errno = ENOMSG;
free(event);
return NULL;
}
event->info = gpiod_line_info_from_uapi(&uapi_evt->info);
if (!event->info) {
free(event);
return NULL;
}
return event;
}
GPIOD_API void gpiod_info_event_free(struct gpiod_info_event *event)
{
if (!event)
return;
gpiod_line_info_free(event->info);
free(event);
}
GPIOD_API enum gpiod_info_event_type
gpiod_info_event_get_event_type(struct gpiod_info_event *event)
{
assert(event);
return event->event_type;
}
GPIOD_API uint64_t
gpiod_info_event_get_timestamp_ns(struct gpiod_info_event *event)
{
assert(event);
return event->timestamp;
}
GPIOD_API struct gpiod_line_info *
gpiod_info_event_get_line_info(struct gpiod_info_event *event)
{
assert(event);
return event->info;
}
struct gpiod_info_event *gpiod_info_event_read_fd(int fd)
{
struct gpio_v2_line_info_changed uapi_evt;
ssize_t rd;
memset(&uapi_evt, 0, sizeof(uapi_evt));
rd = read(fd, &uapi_evt, sizeof(uapi_evt));
if (rd < 0) {
return NULL;
} else if ((unsigned int)rd < sizeof(uapi_evt)) {
errno = EIO;
return NULL;
}
return gpiod_info_event_from_uapi(&uapi_evt);
}
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