man/glib-event-glue.c

   1 /* SPDX-License-Identifier: MIT */
   2 /* Copyright 2014 Tom Gundersen */
   3
   4 #include <stdlib.h>
   5 #include <glib.h>
   6 #include <systemd/sd-event.h>
   7
   8 typedef struct SDEventSource {
   9   GSource source;
  10   GPollFD pollfd;
  11   sd_event *event;
  12 } SDEventSource;
  13
  14 static gboolean event_prepare(GSource *source, gint *timeout_) {
  15   return sd_event_prepare(((SDEventSource *)source)->event) > 0;
  16 }
  17
  18 static gboolean event_check(GSource *source) {
  19   return sd_event_wait(((SDEventSource *)source)->event, 0) > 0;
  20 }
  21
  22 static gboolean event_dispatch(GSource *source, GSourceFunc callback, gpointer user_data) {
  23   return sd_event_dispatch(((SDEventSource *)source)->event) > 0;
  24 }
  25
  26 static void event_finalize(GSource *source) {
  27   sd_event_unref(((SDEventSource *)source)->event);
  28 }
  29
  30 static GSourceFuncs event_funcs = {
  31   .prepare = event_prepare,
  32   .check = event_check,
  33   .dispatch = event_dispatch,
  34   .finalize = event_finalize,
  35 };
  36
  37 GSource *g_sd_event_create_source(sd_event *event) {
  38   SDEventSource *source;
  39
  40   source = (SDEventSource *)g_source_new(&event_funcs, sizeof(SDEventSource));
  41
  42   source->event = sd_event_ref(event);
  43   source->pollfd.fd = sd_event_get_fd(event);
  44   source->pollfd.events = G_IO_IN | G_IO_HUP | G_IO_ERR;
  45
  46   g_source_add_poll((GSource *)source, &source->pollfd);
  47
  48   return (GSource *)source;
  49 }