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author | José Bollo <jose.bollo@iot.bzh> | 2018-02-22 13:22:48 +0100 |
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committer | José Bollo <jose.bollo@iot.bzh> | 2018-02-22 13:22:48 +0100 |
commit | ca820c65c2b03a24e8936218171c6c1d138fd1f7 (patch) | |
tree | f7e31ea8e63d3321af64226e360a78c504a09bb3 /src/fdev-systemd.c | |
parent | f15ea770dd9b13a20331853a026091316984f9ca (diff) |
fdev: Introduce fdev for file event handling
This is an effort to keep cutting dependency to systemd.
Change-Id: I9a0c032a1095e297c7f3ac5b67827fda3658b8d9
Signed-off-by: José Bollo <jose.bollo@iot.bzh>
Diffstat (limited to 'src/fdev-systemd.c')
-rw-r--r-- | src/fdev-systemd.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/fdev-systemd.c b/src/fdev-systemd.c new file mode 100644 index 00000000..0f4a03cd --- /dev/null +++ b/src/fdev-systemd.c @@ -0,0 +1,79 @@ +/* + * Copyright (C) 2018 "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 +}; + +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; +} + |