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/*
* Copyright (C) 2015-2020 "IoT.bzh"
* Author José Bollo <jose.bollo@iot.bzh>
*
* 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 <errno.h>
#include <systemd/sd-event.h>
#define FDEV_PROVIDER
#include "fdev.h"
#include "fdev-systemd.h"
static int handler(sd_event_source *s, int fd, uint32_t revents, void *userdata)
{
struct fdev *fdev = userdata;
fdev_dispatch(fdev, revents);
return 0;
}
static void unref(void *closure)
{
sd_event_source *source = closure;
sd_event_source_unref(source);
}
static void disable(void *closure, const struct fdev *fdev)
{
sd_event_source *source = closure;
sd_event_source_set_enabled(source, SD_EVENT_OFF);
}
static void enable(void *closure, const struct fdev *fdev)
{
sd_event_source *source = closure;
sd_event_source_set_io_events(source, fdev_events(fdev));
sd_event_source_set_enabled(source, SD_EVENT_ON);
}
static struct fdev_itf itf =
{
.unref = unref,
.disable = disable,
.enable = enable,
.update = enable
};
struct fdev *fdev_systemd_create(struct sd_event *eloop, int fd)
{
int rc;
sd_event_source *source;
struct fdev *fdev;
fdev = fdev_create(fd);
if (fdev) {
rc = sd_event_add_io(eloop, &source, fd, 0, handler, fdev);
if (rc < 0) {
fdev_unref(fdev);
fdev = 0;
errno = -rc;
} else {
sd_event_source_set_enabled(source, SD_EVENT_OFF);
fdev_set_itf(fdev, &itf, source);
}
}
return fdev;
}
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