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/*
Unix SMB/CIFS implementation.
Timed event library.
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Volker Lendecke 2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
static struct timed_event *timed_events;
static int timed_event_destructor(void *p)
{
struct timed_event *te = talloc_get_type_abort(p, struct timed_event);
DEBUG(10, ("Destroying timed event %lx \"%s\"\n", (unsigned long)te,
te->event_name));
DLIST_REMOVE(timed_events, te);
return 0;
}
/****************************************************************************
Schedule a function for future calling, cancel with talloc_free().
It's the responsibility of the handler to call talloc_free() on the event
handed to it.
****************************************************************************/
struct timed_event *add_timed_event(TALLOC_CTX *mem_ctx,
struct timeval when,
const char *event_name,
void (*handler)(struct timed_event *te,
const struct timeval *now,
void *private_data),
void *private_data)
{
struct timed_event *te, *last_te, *cur_te;
te = TALLOC_P(mem_ctx, struct timed_event);
if (te == NULL) {
DEBUG(0, ("talloc failed\n"));
return NULL;
}
te->when = when;
te->event_name = event_name;
te->handler = handler;
te->private_data = private_data;
/* keep the list ordered */
last_te = NULL;
for (cur_te = timed_events; cur_te; cur_te = cur_te->next) {
/* if the new event comes before the current one break */
if (!timeval_is_zero(&cur_te->when) &&
timeval_compare(&te->when, &cur_te->when) < 0) {
break;
}
last_te = cur_te;
}
DLIST_ADD_AFTER(timed_events, te, last_te);
talloc_set_destructor(te, timed_event_destructor);
DEBUG(10, ("Added timed event \"%s\": %lx\n", event_name,
(unsigned long)te));
return te;
}
void run_events(void)
{
struct timeval now;
if (timed_events == NULL) {
/* No syscall if there are no events */
DEBUG(11, ("run_events: No events\n"));
return;
}
GetTimeOfDay(&now);
if (timeval_compare(&now, &timed_events->when) < 0) {
/* Nothing to do yet */
DEBUG(11, ("run_events: Nothing to do\n"));
return;
}
DEBUG(10, ("Running event \"%s\" %lx\n", timed_events->event_name,
(unsigned long)timed_events));
timed_events->handler(timed_events, &now, timed_events->private_data);
return;
}
struct timeval *get_timed_events_timeout(struct timeval *to_ret, time_t default_to)
{
struct timeval now;
if (timed_events == NULL) {
if (default_to == (time_t)-1) {
return NULL;
}
*to_ret = timeval_set(default_to, 0);
return to_ret;
}
now = timeval_current();
*to_ret = timeval_until(&now, &timed_events->when);
DEBUG(10, ("timed_events_timeout: %d/%d\n", (int)to_ret->tv_sec,
(int)to_ret->tv_usec));
return to_ret;
}
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