/* SPDX-License-Identifier: MIT-0 */
#include <stdlib.h>
#include <glib.h>
#include <systemd/sd-event.h>
typedef struct SDEventSource {


  GSource source;


  GPollFD pollfd;


  sd_event *event;
} SDEventSource;
static gboolean event_prepare(GSource *source, gint *timeout_) {


  sd_event *event = ((SDEventSource *) source)->event;


  /* GLib does not guarantee that check() is always called between two


   * consecutive prepare() invocations. For example, if another thread


   * attaches/removes a source with poll fds to this GMainContext while


   * the main thread is inside poll(), g_main_context_check_unlocked()


   * returns immediately without calling any source's check().


   *


   * If check() was skipped, the sd_event is still in SD_EVENT_ARMED


   * state.  Return FALSE to let the normal poll() -> check() -> dispatch()


   * path complete the cycle. */


  if (sd_event_get_state(event) == SD_EVENT_ARMED)


    return FALSE;


  return sd_event_prepare(event) > 0;
}
static gboolean event_check(GSource *source) {


  return sd_event_wait(((SDEventSource *)source)->event, 0) > 0;
}
static gboolean event_dispatch(GSource *source, GSourceFunc callback, gpointer user_data) {


  return sd_event_dispatch(((SDEventSource *)source)->event) > 0;
}
static void event_finalize(GSource *source) {


  sd_event_unref(((SDEventSource *)source)->event);
}
static GSourceFuncs event_funcs = {


  .prepare = event_prepare,


  .check = event_check,


  .dispatch = event_dispatch,


  .finalize = event_finalize,
};
GSource *g_sd_event_create_source(sd_event *event) {


  SDEventSource *source;


  source = (SDEventSource *)g_source_new(&event_funcs, sizeof(SDEventSource));


  source->event = sd_event_ref(event);


  source->pollfd.fd = sd_event_get_fd(event);


  source->pollfd.events = G_IO_IN | G_IO_HUP | G_IO_ERR;


  g_source_add_poll((GSource *)source, &source->pollfd);


  return (GSource *)source;
}