man/glib-event-glue.c

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