Unix SMB/CIFS implementation.
main select loop and event handling
Copyright (C) Andrew Tridgell 2003-2005
- 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,
+ Copyright (C) Stefan Metzmacher 2005-2009
+
+ ** NOTE! The following LGPL license applies to the tevent
+ ** library. This does NOT imply that all of Samba is released
+ ** under the LGPL
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 3 of the License, or (at your option) any later version.
+
+ This library 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/>.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
/* information for exiting from the event loop */
int exit_code;
-
- /* this is incremented when the loop over events causes something which
- could change the events yet to be processed */
- uint32_t destruction_count;
};
/*
if (select_ev->maxfd == fde->fd) {
select_ev->maxfd = EVENT_INVALID_MAXFD;
}
-
- select_ev->destruction_count++;
}
return tevent_common_fd_destructor(fde);
struct select_event_context);
struct tevent_fd *fde;
+ if (fd < 0 || fd >= FD_SETSIZE) {
+ errno = EBADF;
+ return NULL;
+ }
+
fde = tevent_common_add_fd(ev, mem_ctx, fd, flags,
handler, private_data,
handler_name, location);
fd_set r_fds, w_fds;
struct tevent_fd *fde;
int selrtn;
- uint32_t destruction_count = ++select_ev->destruction_count;
/* we maybe need to recalculate the maxfd */
if (select_ev->maxfd == EVENT_INVALID_MAXFD) {
/* setup any fd events */
for (fde = select_ev->ev->fd_events; fde; fde = fde->next) {
+ if (fde->fd < 0 || fde->fd >= FD_SETSIZE) {
+ errno = EBADF;
+ return -1;
+ }
+
if (fde->flags & TEVENT_FD_READ) {
FD_SET(fde->fd, &r_fds);
}
if (FD_ISSET(fde->fd, &w_fds)) flags |= TEVENT_FD_WRITE;
if (flags) {
fde->handler(select_ev->ev, fde, flags, fde->private_data);
- if (destruction_count != select_ev->destruction_count) {
- break;
- }
+ break;
}
}
}
return 0;
-}
+}
/*
do a single event loop using the events defined in ev
*/
-static int select_event_loop_once(struct tevent_context *ev)
+static int select_event_loop_once(struct tevent_context *ev, const char *location)
{
struct select_event_context *select_ev = talloc_get_type(ev->additional_data,
struct select_event_context);
struct timeval tval;
- tval = tevent_common_loop_timer_delay(ev);
- if (ev_timeval_is_zero(&tval)) {
+ if (ev->signal_events &&
+ tevent_common_check_signal(ev)) {
return 0;
}
- return select_event_loop_select(select_ev, &tval);
-}
-
-/*
- return on failure or (with 0) if all fd events are removed
-*/
-static int select_event_loop_wait(struct tevent_context *ev)
-{
- struct select_event_context *select_ev = talloc_get_type(ev->additional_data,
- struct select_event_context);
- select_ev->exit_code = 0;
+ if (ev->immediate_events &&
+ tevent_common_loop_immediate(ev)) {
+ return 0;
+ }
- while (ev->fd_events && select_ev->exit_code == 0) {
- if (select_event_loop_once(ev) != 0) {
- break;
- }
+ tval = tevent_common_loop_timer_delay(ev);
+ if (tevent_timeval_is_zero(&tval)) {
+ return 0;
}
- return select_ev->exit_code;
+ return select_event_loop_select(select_ev, &tval);
}
static const struct tevent_ops select_event_ops = {
- .context_init = select_event_context_init,
- .add_fd = select_event_add_fd,
- .set_fd_close_fn= tevent_common_fd_set_close_fn,
- .get_fd_flags = tevent_common_fd_get_flags,
- .set_fd_flags = tevent_common_fd_set_flags,
- .add_timer = tevent_common_add_timer,
- .add_signal = tevent_common_add_signal,
- .loop_once = select_event_loop_once,
- .loop_wait = select_event_loop_wait,
+ .context_init = select_event_context_init,
+ .add_fd = select_event_add_fd,
+ .set_fd_close_fn = tevent_common_fd_set_close_fn,
+ .get_fd_flags = tevent_common_fd_get_flags,
+ .set_fd_flags = tevent_common_fd_set_flags,
+ .add_timer = tevent_common_add_timer,
+ .schedule_immediate = tevent_common_schedule_immediate,
+ .add_signal = tevent_common_add_signal,
+ .loop_once = select_event_loop_once,
+ .loop_wait = tevent_common_loop_wait,
};
bool tevent_select_init(void)
git.samba.org / samba.git / blobdiff