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https://github.com/samba-team/samba.git
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a091c0ac68
Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*
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Unix SMB/CIFS implementation.
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common events code for immediate events
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Copyright (C) Stefan Metzmacher 2009
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** NOTE! The following LGPL license applies to the tevent
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** library. This does NOT imply that all of Samba is released
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** under the LGPL
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "tevent.h"
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#include "tevent_internal.h"
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#include "tevent_util.h"
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static void tevent_common_immediate_cancel(struct tevent_immediate *im)
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{
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if (!im->event_ctx) {
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return;
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}
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tevent_debug(im->event_ctx, TEVENT_DEBUG_TRACE,
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"Cancel immediate event %p \"%s\"\n",
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im, im->handler_name);
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/* let the backend free im->additional_data */
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if (im->cancel_fn) {
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im->cancel_fn(im);
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}
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DLIST_REMOVE(im->event_ctx->immediate_events, im);
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im->event_ctx = NULL;
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im->handler = NULL;
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im->private_data = NULL;
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im->handler_name = NULL;
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im->schedule_location = NULL;
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im->cancel_fn = NULL;
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im->additional_data = NULL;
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talloc_set_destructor(im, NULL);
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}
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/*
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destroy an immediate event
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*/
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static int tevent_common_immediate_destructor(struct tevent_immediate *im)
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{
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tevent_common_immediate_cancel(im);
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return 0;
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}
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/*
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* schedule an immediate event on
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*/
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void tevent_common_schedule_immediate(struct tevent_immediate *im,
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struct tevent_context *ev,
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tevent_immediate_handler_t handler,
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void *private_data,
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const char *handler_name,
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const char *location)
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{
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tevent_common_immediate_cancel(im);
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if (!handler) {
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return;
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}
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im->event_ctx = ev;
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im->handler = handler;
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im->private_data = private_data;
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im->handler_name = handler_name;
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im->schedule_location = location;
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im->cancel_fn = NULL;
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im->additional_data = NULL;
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DLIST_ADD_END(ev->immediate_events, im);
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talloc_set_destructor(im, tevent_common_immediate_destructor);
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tevent_debug(ev, TEVENT_DEBUG_TRACE,
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"Schedule immediate event \"%s\": %p\n",
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handler_name, im);
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}
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/*
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trigger the first immediate event and return true
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if no event was triggered return false
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*/
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bool tevent_common_loop_immediate(struct tevent_context *ev)
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{
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struct tevent_immediate *im = ev->immediate_events;
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tevent_immediate_handler_t handler;
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void *private_data;
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if (!im) {
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return false;
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}
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tevent_debug(ev, TEVENT_DEBUG_TRACE,
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"Run immediate event \"%s\": %p\n",
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im->handler_name, im);
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/*
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* remember the handler and then clear the event
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* the handler might reschedule the event
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*/
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handler = im->handler;
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private_data = im->private_data;
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DLIST_REMOVE(im->event_ctx->immediate_events, im);
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im->event_ctx = NULL;
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im->handler = NULL;
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im->private_data = NULL;
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im->handler_name = NULL;
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im->schedule_location = NULL;
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im->cancel_fn = NULL;
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im->additional_data = NULL;
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talloc_set_destructor(im, NULL);
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handler(ev, im, private_data);
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return true;
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}
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