event_handle_t *
event_register(
event_id_t data,
event_type_t type,
event_fn_t fn,
void *arg)
{
event_handle_t *handle;
GIOCondition cond;
/* sanity-checking */
if ((type == EV_READFD) || (type == EV_WRITEFD)) {
/* make sure we aren't given a high fd that will overflow a fd_set */
if (data >= (int)FD_SETSIZE) {
error(_("event_register: Invalid file descriptor %jd"), data);
/*NOTREACHED*/
}
} else if (type == EV_TIME) {
if (data <= 0) {
error(_("event_register: interval for EV_TIME must be greater than 0; got %jd"), data);
}
}
handle = g_new0(event_handle_t, 1);
handle->fn = fn;
handle->arg = arg;
handle->type = type;
handle->data = data;
handle->is_dead = FALSE;
event_debug(1, _("event: register: %p->data=%jd, type=%s\n"),
handle, handle->data, event_type2str(handle->type));
/* add to the list of events */
all_events = g_slist_prepend(all_events, (gpointer)handle);
/* and set up the GSource for this event */
switch (type) {
case EV_READFD:
case EV_WRITEFD:
/* create a new source */
if (type == EV_READFD) {
cond = G_IO_IN | G_IO_HUP | G_IO_ERR;
} else {
cond = G_IO_OUT | G_IO_ERR;
}
handle->source = new_fdsource(data, cond);
/* attach it to the default GMainLoop */
g_source_attach(handle->source, NULL);
handle->source_id = g_source_get_id(handle->source);
/* And set its callbacks */
g_source_set_callback(handle->source, event_handle_callback,
(gpointer)handle, NULL);
/* drop our reference to it, so when it's detached, it will be
* destroyed. */
g_source_unref(handle->source);
break;
case EV_TIME:
/* Glib provides a nice shortcut for timeouts. The *1000 converts
* seconds to milliseconds. */
handle->source_id = g_timeout_add(data * 1000, event_handle_callback,
(gpointer)handle);
/* But it doesn't give us the source directly.. */
handle->source = g_main_context_find_source_by_id(NULL, handle->source_id);
/* EV_TIME must always be handled after EV_READ */
g_source_set_priority(handle->source, 10);
break;
case EV_WAIT:
/* nothing to do -- these are handled independently of GMainLoop */
break;
default:
error(_("Unknown event type %s"), event_type2str(type));
}
return handle;
}
void
event_activate(
event_handle_t *handle)
{
GIOCondition cond;
assert(handle != NULL);
g_static_mutex_lock(&event_mutex);
/* add to the list of events */
all_events = g_slist_prepend(all_events, (gpointer)handle);
/* and set up the GSource for this event */
switch (handle->type) {
case EV_READFD:
case EV_WRITEFD:
/* create a new source */
if (handle->type == EV_READFD) {
cond = G_IO_IN | G_IO_HUP | G_IO_ERR;
} else {
cond = G_IO_OUT | G_IO_ERR;
}
handle->source = new_fdsource(handle->data, cond);
/* attach it to the default GMainLoop */
g_source_attach(handle->source, NULL);
handle->source_id = g_source_get_id(handle->source);
/* And set its callbacks */
g_source_set_callback(handle->source, event_handle_callback,
(gpointer)handle, NULL);
/* drop our reference to it, so when it's detached, it will be
* destroyed. */
g_source_unref(handle->source);
break;
case EV_TIME:
/* Glib provides a nice shortcut for timeouts. The *1000 converts
* seconds to milliseconds. */
handle->source_id = g_timeout_add(handle->data * 1000, event_handle_callback,
(gpointer)handle);
/* But it doesn't give us the source directly.. */
handle->source = g_main_context_find_source_by_id(NULL, handle->source_id);
/* EV_TIME must always be handled after EV_READ */
g_source_set_priority(handle->source, 10);
break;
case EV_WAIT:
/* nothing to do -- these are handled independently of GMainLoop */
break;
default:
error(_("Unknown event type %s"), event_type2str(handle->type));
}
g_static_mutex_unlock(&event_mutex);
return;
}
