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authorStefan Metzmacher <metze@samba.org>2008-12-16 16:10:22 +0100
committerStefan Metzmacher <metze@samba.org>2008-12-17 13:31:28 +0100
commit504f8816e3058b9358a18ef42e442753fe2657ba (patch)
treec2e50faf775bfb44fcb5c9fa923402f5c07c99ad /source4/lib/events/events_timed.c
parent09e6dfb8e8d1447306951e34e4e2211037edb9be (diff)
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s4:lib/events: move to toplevel directory as lib/tevent/
This commit will not compile on its own. metze
Diffstat (limited to 'source4/lib/events/events_timed.c')
-rw-r--r--source4/lib/events/events_timed.c230
1 files changed, 0 insertions, 230 deletions
diff --git a/source4/lib/events/events_timed.c b/source4/lib/events/events_timed.c
deleted file mode 100644
index c58c898c6d..0000000000
--- a/source4/lib/events/events_timed.c
+++ /dev/null
@@ -1,230 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
-
- common events code for timed events
-
- Copyright (C) Andrew Tridgell 2003-2006
- Copyright (C) Stefan Metzmacher 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 3 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, see <http://www.gnu.org/licenses/>.
-*/
-
-#include <sys/time.h>
-#include <time.h>
-#include "replace.h"
-#include "system/filesys.h"
-#include "system/select.h"
-#include "events.h"
-#include "events_internal.h"
-#include "events_util.h"
-
-/**
- compare two timeval structures.
- Return -1 if tv1 < tv2
- Return 0 if tv1 == tv2
- Return 1 if tv1 > tv2
-*/
-static int ev_timeval_compare(const struct timeval *tv1, const struct timeval *tv2)
-{
- if (tv1->tv_sec > tv2->tv_sec) return 1;
- if (tv1->tv_sec < tv2->tv_sec) return -1;
- if (tv1->tv_usec > tv2->tv_usec) return 1;
- if (tv1->tv_usec < tv2->tv_usec) return -1;
- return 0;
-}
-
-/**
- return a zero timeval
-*/
-static struct timeval ev_timeval_zero(void)
-{
- struct timeval tv;
- tv.tv_sec = 0;
- tv.tv_usec = 0;
- return tv;
-}
-
-/**
- return a timeval for the current time
-*/
-static struct timeval ev_timeval_current(void)
-{
- struct timeval tv;
- gettimeofday(&tv, NULL);
- return tv;
-}
-
-/**
- return a timeval struct with the given elements
-*/
-static struct timeval ev_timeval_set(uint32_t secs, uint32_t usecs)
-{
- struct timeval tv;
- tv.tv_sec = secs;
- tv.tv_usec = usecs;
- return tv;
-}
-
-/**
- return the difference between two timevals as a timeval
- if tv1 comes after tv2, then return a zero timeval
- (this is *tv2 - *tv1)
-*/
-static struct timeval ev_timeval_until(const struct timeval *tv1,
- const struct timeval *tv2)
-{
- struct timeval t;
- if (ev_timeval_compare(tv1, tv2) >= 0) {
- return ev_timeval_zero();
- }
- t.tv_sec = tv2->tv_sec - tv1->tv_sec;
- if (tv1->tv_usec > tv2->tv_usec) {
- t.tv_sec--;
- t.tv_usec = 1000000 - (tv1->tv_usec - tv2->tv_usec);
- } else {
- t.tv_usec = tv2->tv_usec - tv1->tv_usec;
- }
- return t;
-}
-
-/**
- return true if a timeval is zero
-*/
-bool ev_timeval_is_zero(const struct timeval *tv)
-{
- return tv->tv_sec == 0 && tv->tv_usec == 0;
-}
-
-/*
- destroy a timed event
-*/
-static int common_event_timed_destructor(struct timed_event *te)
-{
- struct event_context *ev = talloc_get_type(te->event_ctx,
- struct event_context);
- DLIST_REMOVE(ev->timed_events, te);
- return 0;
-}
-
-static int common_event_timed_deny_destructor(struct timed_event *te)
-{
- return -1;
-}
-
-/*
- add a timed event
- return NULL on failure (memory allocation error)
-*/
-struct timed_event *common_event_add_timed(struct event_context *ev, TALLOC_CTX *mem_ctx,
- struct timeval next_event,
- event_timed_handler_t handler,
- void *private_data)
-{
- struct timed_event *te, *last_te, *cur_te;
-
- te = talloc(mem_ctx?mem_ctx:ev, struct timed_event);
- if (te == NULL) return NULL;
-
- te->event_ctx = ev;
- te->next_event = next_event;
- te->handler = handler;
- te->private_data = private_data;
- te->additional_data = NULL;
-
- /* keep the list ordered */
- last_te = NULL;
- for (cur_te = ev->timed_events; cur_te; cur_te = cur_te->next) {
- /* if the new event comes before the current one break */
- if (ev_timeval_compare(&te->next_event, &cur_te->next_event) < 0) {
- break;
- }
-
- last_te = cur_te;
- }
-
- DLIST_ADD_AFTER(ev->timed_events, te, last_te);
-
- talloc_set_destructor(te, common_event_timed_destructor);
-
- return te;
-}
-
-/*
- do a single event loop using the events defined in ev
-
- return the delay untill the next timed event,
- or zero if a timed event was triggered
-*/
-struct timeval common_event_loop_timer_delay(struct event_context *ev)
-{
- struct timeval current_time = ev_timeval_zero();
- struct timed_event *te = ev->timed_events;
-
- if (!te) {
- /* have a default tick time of 30 seconds. This guarantees
- that code that uses its own timeout checking will be
- able to proceeed eventually */
- return ev_timeval_set(30, 0);
- }
-
- /*
- * work out the right timeout for the next timed event
- *
- * avoid the syscall to gettimeofday() if the timed event should
- * be triggered directly
- *
- * if there's a delay till the next timed event, we're done
- * with just returning the delay
- */
- if (!ev_timeval_is_zero(&te->next_event)) {
- struct timeval delay;
-
- current_time = ev_timeval_current();
-
- delay = ev_timeval_until(&current_time, &te->next_event);
- if (!ev_timeval_is_zero(&delay)) {
- return delay;
- }
- }
-
- /*
- * ok, we have a timed event that we'll process ...
- */
-
- /* deny the handler to free the event */
- talloc_set_destructor(te, common_event_timed_deny_destructor);
-
- /* We need to remove the timer from the list before calling the
- * handler because in a semi-async inner event loop called from the
- * handler we don't want to come across this event again -- vl */
- DLIST_REMOVE(ev->timed_events, te);
-
- /*
- * If the timed event was registered for a zero current_time,
- * then we pass a zero timeval here too! To avoid the
- * overhead of gettimeofday() calls.
- *
- * otherwise we pass the current time
- */
- te->handler(ev, te, current_time, te->private_data);
-
- /* The destructor isn't necessary anymore, we've already removed the
- * event from the list. */
- talloc_set_destructor(te, NULL);
-
- talloc_free(te);
-
- return ev_timeval_zero();
-}
-