2 * Copyright (c) 2002-2007 Niels Provos <provos@citi.umich.edu>
3 * Copyright (c) 2007-2012 Niels Provos, Nick Mathewson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include "event2/event-config.h"
29 #include "evconfig-private.h"
31 #include <sys/types.h>
33 #ifdef EVENT__HAVE_SYS_TIME_H
41 #ifdef EVENT__HAVE_STDARG_H
50 #include "event2/util.h"
51 #include "event2/buffer.h"
52 #include "event2/buffer_compat.h"
53 #include "event2/bufferevent.h"
54 #include "event2/bufferevent_struct.h"
55 #include "event2/bufferevent_compat.h"
56 #include "event2/event.h"
57 #include "event-internal.h"
58 #include "log-internal.h"
59 #include "mm-internal.h"
60 #include "bufferevent-internal.h"
61 #include "evbuffer-internal.h"
62 #include "util-internal.h"
64 static void bufferevent_cancel_all_(struct bufferevent *bev);
65 static void bufferevent_finalize_cb_(struct event_callback *evcb, void *arg_);
68 bufferevent_suspend_read_(struct bufferevent *bufev, bufferevent_suspend_flags what)
70 struct bufferevent_private *bufev_private =
71 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
73 if (!bufev_private->read_suspended)
74 bufev->be_ops->disable(bufev, EV_READ);
75 bufev_private->read_suspended |= what;
80 bufferevent_unsuspend_read_(struct bufferevent *bufev, bufferevent_suspend_flags what)
82 struct bufferevent_private *bufev_private =
83 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
85 bufev_private->read_suspended &= ~what;
86 if (!bufev_private->read_suspended && (bufev->enabled & EV_READ))
87 bufev->be_ops->enable(bufev, EV_READ);
92 bufferevent_suspend_write_(struct bufferevent *bufev, bufferevent_suspend_flags what)
94 struct bufferevent_private *bufev_private =
95 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
97 if (!bufev_private->write_suspended)
98 bufev->be_ops->disable(bufev, EV_WRITE);
99 bufev_private->write_suspended |= what;
104 bufferevent_unsuspend_write_(struct bufferevent *bufev, bufferevent_suspend_flags what)
106 struct bufferevent_private *bufev_private =
107 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
109 bufev_private->write_suspended &= ~what;
110 if (!bufev_private->write_suspended && (bufev->enabled & EV_WRITE))
111 bufev->be_ops->enable(bufev, EV_WRITE);
116 /* Callback to implement watermarks on the input buffer. Only enabled
117 * if the watermark is set. */
119 bufferevent_inbuf_wm_cb(struct evbuffer *buf,
120 const struct evbuffer_cb_info *cbinfo,
123 struct bufferevent *bufev = arg;
126 size = evbuffer_get_length(buf);
128 if (size >= bufev->wm_read.high)
129 bufferevent_wm_suspend_read(bufev);
131 bufferevent_wm_unsuspend_read(bufev);
135 bufferevent_run_deferred_callbacks_locked(struct event_callback *cb, void *arg)
137 struct bufferevent_private *bufev_private = arg;
138 struct bufferevent *bufev = &bufev_private->bev;
141 if ((bufev_private->eventcb_pending & BEV_EVENT_CONNECTED) &&
143 /* The "connected" happened before any reads or writes, so
145 bufev_private->eventcb_pending &= ~BEV_EVENT_CONNECTED;
146 bufev->errorcb(bufev, BEV_EVENT_CONNECTED, bufev->cbarg);
148 if (bufev_private->readcb_pending && bufev->readcb) {
149 bufev_private->readcb_pending = 0;
150 bufev->readcb(bufev, bufev->cbarg);
152 if (bufev_private->writecb_pending && bufev->writecb) {
153 bufev_private->writecb_pending = 0;
154 bufev->writecb(bufev, bufev->cbarg);
156 if (bufev_private->eventcb_pending && bufev->errorcb) {
157 short what = bufev_private->eventcb_pending;
158 int err = bufev_private->errno_pending;
159 bufev_private->eventcb_pending = 0;
160 bufev_private->errno_pending = 0;
161 EVUTIL_SET_SOCKET_ERROR(err);
162 bufev->errorcb(bufev, what, bufev->cbarg);
164 bufferevent_decref_and_unlock_(bufev);
168 bufferevent_run_deferred_callbacks_unlocked(struct event_callback *cb, void *arg)
170 struct bufferevent_private *bufev_private = arg;
171 struct bufferevent *bufev = &bufev_private->bev;
174 #define UNLOCKED(stmt) \
175 do { BEV_UNLOCK(bufev); stmt; BEV_LOCK(bufev); } while(0)
177 if ((bufev_private->eventcb_pending & BEV_EVENT_CONNECTED) &&
179 /* The "connected" happened before any reads or writes, so
181 bufferevent_event_cb errorcb = bufev->errorcb;
182 void *cbarg = bufev->cbarg;
183 bufev_private->eventcb_pending &= ~BEV_EVENT_CONNECTED;
184 UNLOCKED(errorcb(bufev, BEV_EVENT_CONNECTED, cbarg));
186 if (bufev_private->readcb_pending && bufev->readcb) {
187 bufferevent_data_cb readcb = bufev->readcb;
188 void *cbarg = bufev->cbarg;
189 bufev_private->readcb_pending = 0;
190 UNLOCKED(readcb(bufev, cbarg));
192 if (bufev_private->writecb_pending && bufev->writecb) {
193 bufferevent_data_cb writecb = bufev->writecb;
194 void *cbarg = bufev->cbarg;
195 bufev_private->writecb_pending = 0;
196 UNLOCKED(writecb(bufev, cbarg));
198 if (bufev_private->eventcb_pending && bufev->errorcb) {
199 bufferevent_event_cb errorcb = bufev->errorcb;
200 void *cbarg = bufev->cbarg;
201 short what = bufev_private->eventcb_pending;
202 int err = bufev_private->errno_pending;
203 bufev_private->eventcb_pending = 0;
204 bufev_private->errno_pending = 0;
205 EVUTIL_SET_SOCKET_ERROR(err);
206 UNLOCKED(errorcb(bufev,what,cbarg));
208 bufferevent_decref_and_unlock_(bufev);
212 #define SCHEDULE_DEFERRED(bevp) \
214 if (event_deferred_cb_schedule_( \
215 (bevp)->bev.ev_base, \
216 &(bevp)->deferred)) \
217 bufferevent_incref_(&(bevp)->bev); \
222 bufferevent_run_readcb_(struct bufferevent *bufev, int options)
224 /* Requires that we hold the lock and a reference */
225 struct bufferevent_private *p =
226 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
227 if (bufev->readcb == NULL)
229 if ((p->options|options) & BEV_OPT_DEFER_CALLBACKS) {
230 p->readcb_pending = 1;
231 SCHEDULE_DEFERRED(p);
233 bufev->readcb(bufev, bufev->cbarg);
238 bufferevent_run_writecb_(struct bufferevent *bufev, int options)
240 /* Requires that we hold the lock and a reference */
241 struct bufferevent_private *p =
242 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
243 if (bufev->writecb == NULL)
245 if ((p->options|options) & BEV_OPT_DEFER_CALLBACKS) {
246 p->writecb_pending = 1;
247 SCHEDULE_DEFERRED(p);
249 bufev->writecb(bufev, bufev->cbarg);
253 #define BEV_TRIG_ALL_OPTS ( \
254 BEV_TRIG_IGNORE_WATERMARKS| \
255 BEV_TRIG_DEFER_CALLBACKS \
259 bufferevent_trigger(struct bufferevent *bufev, short iotype, int options)
261 bufferevent_incref_and_lock_(bufev);
262 bufferevent_trigger_nolock_(bufev, iotype, options&BEV_TRIG_ALL_OPTS);
263 bufferevent_decref_and_unlock_(bufev);
267 bufferevent_run_eventcb_(struct bufferevent *bufev, short what, int options)
269 /* Requires that we hold the lock and a reference */
270 struct bufferevent_private *p =
271 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
272 if (bufev->errorcb == NULL)
274 if ((p->options|options) & BEV_OPT_DEFER_CALLBACKS) {
275 p->eventcb_pending |= what;
276 p->errno_pending = EVUTIL_SOCKET_ERROR();
277 SCHEDULE_DEFERRED(p);
279 bufev->errorcb(bufev, what, bufev->cbarg);
284 bufferevent_trigger_event(struct bufferevent *bufev, short what, int options)
286 bufferevent_incref_and_lock_(bufev);
287 bufferevent_run_eventcb_(bufev, what, options&BEV_TRIG_ALL_OPTS);
288 bufferevent_decref_and_unlock_(bufev);
292 bufferevent_init_common_(struct bufferevent_private *bufev_private,
293 struct event_base *base,
294 const struct bufferevent_ops *ops,
295 enum bufferevent_options options)
297 struct bufferevent *bufev = &bufev_private->bev;
300 if ((bufev->input = evbuffer_new()) == NULL)
304 if (!bufev->output) {
305 if ((bufev->output = evbuffer_new()) == NULL) {
306 evbuffer_free(bufev->input);
311 bufev_private->refcnt = 1;
312 bufev->ev_base = base;
314 /* Disable timeouts. */
315 evutil_timerclear(&bufev->timeout_read);
316 evutil_timerclear(&bufev->timeout_write);
320 bufferevent_ratelim_init_(bufev_private);
323 * Set to EV_WRITE so that using bufferevent_write is going to
324 * trigger a callback. Reading needs to be explicitly enabled
325 * because otherwise no data will be available.
327 bufev->enabled = EV_WRITE;
329 #ifndef EVENT__DISABLE_THREAD_SUPPORT
330 if (options & BEV_OPT_THREADSAFE) {
331 if (bufferevent_enable_locking_(bufev, NULL) < 0) {
333 evbuffer_free(bufev->input);
334 evbuffer_free(bufev->output);
336 bufev->output = NULL;
341 if ((options & (BEV_OPT_DEFER_CALLBACKS|BEV_OPT_UNLOCK_CALLBACKS))
342 == BEV_OPT_UNLOCK_CALLBACKS) {
343 event_warnx("UNLOCK_CALLBACKS requires DEFER_CALLBACKS");
346 if (options & BEV_OPT_UNLOCK_CALLBACKS)
347 event_deferred_cb_init_(
348 &bufev_private->deferred,
349 event_base_get_npriorities(base) / 2,
350 bufferevent_run_deferred_callbacks_unlocked,
353 event_deferred_cb_init_(
354 &bufev_private->deferred,
355 event_base_get_npriorities(base) / 2,
356 bufferevent_run_deferred_callbacks_locked,
359 bufev_private->options = options;
361 evbuffer_set_parent_(bufev->input, bufev);
362 evbuffer_set_parent_(bufev->output, bufev);
368 bufferevent_setcb(struct bufferevent *bufev,
369 bufferevent_data_cb readcb, bufferevent_data_cb writecb,
370 bufferevent_event_cb eventcb, void *cbarg)
374 bufev->readcb = readcb;
375 bufev->writecb = writecb;
376 bufev->errorcb = eventcb;
378 bufev->cbarg = cbarg;
383 bufferevent_getcb(struct bufferevent *bufev,
384 bufferevent_data_cb *readcb_ptr,
385 bufferevent_data_cb *writecb_ptr,
386 bufferevent_event_cb *eventcb_ptr,
391 *readcb_ptr = bufev->readcb;
393 *writecb_ptr = bufev->writecb;
395 *eventcb_ptr = bufev->errorcb;
397 *cbarg_ptr = bufev->cbarg;
403 bufferevent_get_input(struct bufferevent *bufev)
409 bufferevent_get_output(struct bufferevent *bufev)
411 return bufev->output;
415 bufferevent_get_base(struct bufferevent *bufev)
417 return bufev->ev_base;
421 bufferevent_get_priority(const struct bufferevent *bufev)
423 if (event_initialized(&bufev->ev_read)) {
424 return event_get_priority(&bufev->ev_read);
426 return event_base_get_npriorities(bufev->ev_base) / 2;
431 bufferevent_write(struct bufferevent *bufev, const void *data, size_t size)
433 if (evbuffer_add(bufev->output, data, size) == -1)
440 bufferevent_write_buffer(struct bufferevent *bufev, struct evbuffer *buf)
442 if (evbuffer_add_buffer(bufev->output, buf) == -1)
449 bufferevent_read(struct bufferevent *bufev, void *data, size_t size)
451 return (evbuffer_remove(bufev->input, data, size));
455 bufferevent_read_buffer(struct bufferevent *bufev, struct evbuffer *buf)
457 return (evbuffer_add_buffer(buf, bufev->input));
461 bufferevent_enable(struct bufferevent *bufev, short event)
463 struct bufferevent_private *bufev_private =
464 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
465 short impl_events = event;
468 bufferevent_incref_and_lock_(bufev);
469 if (bufev_private->read_suspended)
470 impl_events &= ~EV_READ;
471 if (bufev_private->write_suspended)
472 impl_events &= ~EV_WRITE;
474 bufev->enabled |= event;
476 if (impl_events && bufev->be_ops->enable(bufev, impl_events) < 0)
479 bufferevent_decref_and_unlock_(bufev);
484 bufferevent_set_timeouts(struct bufferevent *bufev,
485 const struct timeval *tv_read,
486 const struct timeval *tv_write)
491 bufev->timeout_read = *tv_read;
493 evutil_timerclear(&bufev->timeout_read);
496 bufev->timeout_write = *tv_write;
498 evutil_timerclear(&bufev->timeout_write);
501 if (bufev->be_ops->adj_timeouts)
502 r = bufev->be_ops->adj_timeouts(bufev);
509 /* Obsolete; use bufferevent_set_timeouts */
511 bufferevent_settimeout(struct bufferevent *bufev,
512 int timeout_read, int timeout_write)
514 struct timeval tv_read, tv_write;
515 struct timeval *ptv_read = NULL, *ptv_write = NULL;
517 memset(&tv_read, 0, sizeof(tv_read));
518 memset(&tv_write, 0, sizeof(tv_write));
521 tv_read.tv_sec = timeout_read;
525 tv_write.tv_sec = timeout_write;
526 ptv_write = &tv_write;
529 bufferevent_set_timeouts(bufev, ptv_read, ptv_write);
534 bufferevent_disable_hard_(struct bufferevent *bufev, short event)
537 struct bufferevent_private *bufev_private =
538 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
541 bufev->enabled &= ~event;
543 bufev_private->connecting = 0;
544 if (bufev->be_ops->disable(bufev, event) < 0)
552 bufferevent_disable(struct bufferevent *bufev, short event)
557 bufev->enabled &= ~event;
559 if (bufev->be_ops->disable(bufev, event) < 0)
567 * Sets the water marks
571 bufferevent_setwatermark(struct bufferevent *bufev, short events,
572 size_t lowmark, size_t highmark)
574 struct bufferevent_private *bufev_private =
575 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
578 if (events & EV_WRITE) {
579 bufev->wm_write.low = lowmark;
580 bufev->wm_write.high = highmark;
583 if (events & EV_READ) {
584 bufev->wm_read.low = lowmark;
585 bufev->wm_read.high = highmark;
588 /* There is now a new high-water mark for read.
589 enable the callback if needed, and see if we should
590 suspend/bufferevent_wm_unsuspend. */
592 if (bufev_private->read_watermarks_cb == NULL) {
593 bufev_private->read_watermarks_cb =
594 evbuffer_add_cb(bufev->input,
595 bufferevent_inbuf_wm_cb,
598 evbuffer_cb_set_flags(bufev->input,
599 bufev_private->read_watermarks_cb,
600 EVBUFFER_CB_ENABLED|EVBUFFER_CB_NODEFER);
602 if (evbuffer_get_length(bufev->input) >= highmark)
603 bufferevent_wm_suspend_read(bufev);
604 else if (evbuffer_get_length(bufev->input) < highmark)
605 bufferevent_wm_unsuspend_read(bufev);
607 /* There is now no high-water mark for read. */
608 if (bufev_private->read_watermarks_cb)
609 evbuffer_cb_clear_flags(bufev->input,
610 bufev_private->read_watermarks_cb,
611 EVBUFFER_CB_ENABLED);
612 bufferevent_wm_unsuspend_read(bufev);
619 bufferevent_getwatermark(struct bufferevent *bufev, short events,
620 size_t *lowmark, size_t *highmark)
622 if (events == EV_WRITE) {
625 *lowmark = bufev->wm_write.low;
627 *highmark = bufev->wm_write.high;
632 if (events == EV_READ) {
635 *lowmark = bufev->wm_read.low;
637 *highmark = bufev->wm_read.high;
645 bufferevent_flush(struct bufferevent *bufev,
647 enum bufferevent_flush_mode mode)
651 if (bufev->be_ops->flush)
652 r = bufev->be_ops->flush(bufev, iotype, mode);
658 bufferevent_incref_and_lock_(struct bufferevent *bufev)
660 struct bufferevent_private *bufev_private =
663 ++bufev_private->refcnt;
668 bufferevent_transfer_lock_ownership_(struct bufferevent *donor,
669 struct bufferevent *recipient)
671 struct bufferevent_private *d = BEV_UPCAST(donor);
672 struct bufferevent_private *r = BEV_UPCAST(recipient);
673 if (d->lock != r->lock)
685 bufferevent_decref_and_unlock_(struct bufferevent *bufev)
687 struct bufferevent_private *bufev_private =
688 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
691 struct event_callback *cbs[MAX_CBS];
693 EVUTIL_ASSERT(bufev_private->refcnt > 0);
695 if (--bufev_private->refcnt) {
700 if (bufev->be_ops->unlink)
701 bufev->be_ops->unlink(bufev);
703 /* Okay, we're out of references. Let's finalize this once all the
704 * callbacks are done running. */
705 cbs[0] = &bufev->ev_read.ev_evcallback;
706 cbs[1] = &bufev->ev_write.ev_evcallback;
707 cbs[2] = &bufev_private->deferred;
709 if (bufev_private->rate_limiting) {
710 struct event *e = &bufev_private->rate_limiting->refill_bucket_event;
711 if (event_initialized(e))
712 cbs[n_cbs++] = &e->ev_evcallback;
714 n_cbs += evbuffer_get_callbacks_(bufev->input, cbs+n_cbs, MAX_CBS-n_cbs);
715 n_cbs += evbuffer_get_callbacks_(bufev->output, cbs+n_cbs, MAX_CBS-n_cbs);
717 event_callback_finalize_many_(bufev->ev_base, n_cbs, cbs,
718 bufferevent_finalize_cb_);
727 bufferevent_finalize_cb_(struct event_callback *evcb, void *arg_)
729 struct bufferevent *bufev = arg_;
730 struct bufferevent *underlying;
731 struct bufferevent_private *bufev_private =
732 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
735 underlying = bufferevent_get_underlying(bufev);
737 /* Clean up the shared info */
738 if (bufev->be_ops->destruct)
739 bufev->be_ops->destruct(bufev);
741 /* XXX what happens if refcnt for these buffers is > 1?
742 * The buffers can share a lock with this bufferevent object,
743 * but the lock might be destroyed below. */
744 /* evbuffer will free the callbacks */
745 evbuffer_free(bufev->input);
746 evbuffer_free(bufev->output);
748 if (bufev_private->rate_limiting) {
749 if (bufev_private->rate_limiting->group)
750 bufferevent_remove_from_rate_limit_group_internal_(bufev,0);
751 mm_free(bufev_private->rate_limiting);
752 bufev_private->rate_limiting = NULL;
758 if (bufev_private->own_lock)
759 EVTHREAD_FREE_LOCK(bufev_private->lock,
760 EVTHREAD_LOCKTYPE_RECURSIVE);
762 /* Free the actual allocated memory. */
763 mm_free(((char*)bufev) - bufev->be_ops->mem_offset);
765 /* Release the reference to underlying now that we no longer need the
766 * reference to it. We wait this long mainly in case our lock is
767 * shared with underlying.
769 * The 'destruct' function will also drop a reference to underlying
770 * if BEV_OPT_CLOSE_ON_FREE is set.
772 * XXX Should we/can we just refcount evbuffer/bufferevent locks?
773 * It would probably save us some headaches.
776 bufferevent_decref_(underlying);
780 bufferevent_decref_(struct bufferevent *bufev)
783 return bufferevent_decref_and_unlock_(bufev);
787 bufferevent_free(struct bufferevent *bufev)
790 bufferevent_setcb(bufev, NULL, NULL, NULL, NULL);
791 bufferevent_cancel_all_(bufev);
792 bufferevent_decref_and_unlock_(bufev);
796 bufferevent_incref_(struct bufferevent *bufev)
798 struct bufferevent_private *bufev_private =
799 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
802 ++bufev_private->refcnt;
807 bufferevent_enable_locking_(struct bufferevent *bufev, void *lock)
809 #ifdef EVENT__DISABLE_THREAD_SUPPORT
812 struct bufferevent *underlying;
814 if (BEV_UPCAST(bufev)->lock)
816 underlying = bufferevent_get_underlying(bufev);
818 if (!lock && underlying && BEV_UPCAST(underlying)->lock) {
819 lock = BEV_UPCAST(underlying)->lock;
820 BEV_UPCAST(bufev)->lock = lock;
821 BEV_UPCAST(bufev)->own_lock = 0;
823 EVTHREAD_ALLOC_LOCK(lock, EVTHREAD_LOCKTYPE_RECURSIVE);
826 BEV_UPCAST(bufev)->lock = lock;
827 BEV_UPCAST(bufev)->own_lock = 1;
829 BEV_UPCAST(bufev)->lock = lock;
830 BEV_UPCAST(bufev)->own_lock = 0;
832 evbuffer_enable_locking(bufev->input, lock);
833 evbuffer_enable_locking(bufev->output, lock);
835 if (underlying && !BEV_UPCAST(underlying)->lock)
836 bufferevent_enable_locking_(underlying, lock);
843 bufferevent_setfd(struct bufferevent *bev, evutil_socket_t fd)
845 union bufferevent_ctrl_data d;
849 if (bev->be_ops->ctrl)
850 res = bev->be_ops->ctrl(bev, BEV_CTRL_SET_FD, &d);
856 bufferevent_getfd(struct bufferevent *bev)
858 union bufferevent_ctrl_data d;
862 if (bev->be_ops->ctrl)
863 res = bev->be_ops->ctrl(bev, BEV_CTRL_GET_FD, &d);
865 return (res<0) ? -1 : d.fd;
868 enum bufferevent_options
869 bufferevent_get_options_(struct bufferevent *bev)
871 struct bufferevent_private *bev_p =
872 EVUTIL_UPCAST(bev, struct bufferevent_private, bev);
873 enum bufferevent_options options;
876 options = bev_p->options;
883 bufferevent_cancel_all_(struct bufferevent *bev)
885 union bufferevent_ctrl_data d;
886 memset(&d, 0, sizeof(d));
888 if (bev->be_ops->ctrl)
889 bev->be_ops->ctrl(bev, BEV_CTRL_CANCEL_ALL, &d);
894 bufferevent_get_enabled(struct bufferevent *bufev)
904 bufferevent_get_underlying(struct bufferevent *bev)
906 union bufferevent_ctrl_data d;
910 if (bev->be_ops->ctrl)
911 res = bev->be_ops->ctrl(bev, BEV_CTRL_GET_UNDERLYING, &d);
913 return (res<0) ? NULL : d.ptr;
917 bufferevent_generic_read_timeout_cb(evutil_socket_t fd, short event, void *ctx)
919 struct bufferevent *bev = ctx;
920 bufferevent_incref_and_lock_(bev);
921 bufferevent_disable(bev, EV_READ);
922 bufferevent_run_eventcb_(bev, BEV_EVENT_TIMEOUT|BEV_EVENT_READING, 0);
923 bufferevent_decref_and_unlock_(bev);
926 bufferevent_generic_write_timeout_cb(evutil_socket_t fd, short event, void *ctx)
928 struct bufferevent *bev = ctx;
929 bufferevent_incref_and_lock_(bev);
930 bufferevent_disable(bev, EV_WRITE);
931 bufferevent_run_eventcb_(bev, BEV_EVENT_TIMEOUT|BEV_EVENT_WRITING, 0);
932 bufferevent_decref_and_unlock_(bev);
936 bufferevent_init_generic_timeout_cbs_(struct bufferevent *bev)
938 event_assign(&bev->ev_read, bev->ev_base, -1, EV_FINALIZE,
939 bufferevent_generic_read_timeout_cb, bev);
940 event_assign(&bev->ev_write, bev->ev_base, -1, EV_FINALIZE,
941 bufferevent_generic_write_timeout_cb, bev);
945 bufferevent_generic_adj_timeouts_(struct bufferevent *bev)
947 const short enabled = bev->enabled;
948 struct bufferevent_private *bev_p =
949 EVUTIL_UPCAST(bev, struct bufferevent_private, bev);
951 if ((enabled & EV_READ) && !bev_p->read_suspended &&
952 evutil_timerisset(&bev->timeout_read))
953 r1 = event_add(&bev->ev_read, &bev->timeout_read);
955 r1 = event_del(&bev->ev_read);
957 if ((enabled & EV_WRITE) && !bev_p->write_suspended &&
958 evutil_timerisset(&bev->timeout_write) &&
959 evbuffer_get_length(bev->output))
960 r2 = event_add(&bev->ev_write, &bev->timeout_write);
962 r2 = event_del(&bev->ev_write);
963 if (r1 < 0 || r2 < 0)
969 bufferevent_add_event_(struct event *ev, const struct timeval *tv)
971 if (tv->tv_sec == 0 && tv->tv_usec == 0)
972 return event_add(ev, NULL);
974 return event_add(ev, tv);
977 /* For use by user programs only; internally, we should be calling
978 either bufferevent_incref_and_lock_(), or BEV_LOCK. */
980 bufferevent_lock(struct bufferevent *bev)
982 bufferevent_incref_and_lock_(bev);
986 bufferevent_unlock(struct bufferevent *bev)
988 bufferevent_decref_and_unlock_(bev);