1 files changed, 0 insertions, 360 deletions
diff --git a/libs/libevent/src/bufferevent_pair.c b/libs/libevent/src/bufferevent_pair.c
deleted file mode 100644
index d80e5f81d6..0000000000
--- a/libs/libevent/src/bufferevent_pair.c
+++ /dev/null
@@ -1,360 +0,0 @@
-/*
- * Copyright (c) 2009-2012 Niels Provos, Nick Mathewson
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-#include "event2/event-config.h"
-#include "evconfig-private.h"
-
-#include <sys/types.h>
-
-#ifdef _WIN32
-#include <winsock2.h>
-#endif
-
-#include "event2/util.h"
-#include "event2/buffer.h"
-#include "event2/bufferevent.h"
-#include "event2/bufferevent_struct.h"
-#include "event2/event.h"
-#include "defer-internal.h"
-#include "bufferevent-internal.h"
-#include "mm-internal.h"
-#include "util-internal.h"
-
-struct bufferevent_pair {
-	struct bufferevent_private bev;
-	struct bufferevent_pair *partner;
-	/* For ->destruct() lock checking */
-	struct bufferevent_pair *unlinked_partner;
-};
-
-
-/* Given a bufferevent that's really a bev part of a bufferevent_pair,
- * return that bufferevent_filtered. Returns NULL otherwise.*/
-static inline struct bufferevent_pair *
-upcast(struct bufferevent *bev)
-{
-	struct bufferevent_pair *bev_p;
-	if (bev->be_ops != &bufferevent_ops_pair)
-		return NULL;
-	bev_p = EVUTIL_UPCAST(bev, struct bufferevent_pair, bev.bev);
-	EVUTIL_ASSERT(bev_p->bev.bev.be_ops == &bufferevent_ops_pair);
-	return bev_p;
-}
-
-#define downcast(bev_pair) (&(bev_pair)->bev.bev)
-
-static inline void
-incref_and_lock(struct bufferevent *b)
-{
-	struct bufferevent_pair *bevp;
-	bufferevent_incref_and_lock_(b);
-	bevp = upcast(b);
-	if (bevp->partner)
-		bufferevent_incref_and_lock_(downcast(bevp->partner));
-}
-
-static inline void
-decref_and_unlock(struct bufferevent *b)
-{
-	struct bufferevent_pair *bevp = upcast(b);
-	if (bevp->partner)
-		bufferevent_decref_and_unlock_(downcast(bevp->partner));
-	bufferevent_decref_and_unlock_(b);
-}
-
-/* XXX Handle close */
-
-static void be_pair_outbuf_cb(struct evbuffer *,
-    const struct evbuffer_cb_info *, void *);
-
-static struct bufferevent_pair *
-bufferevent_pair_elt_new(struct event_base *base,
-    int options)
-{
-	struct bufferevent_pair *bufev;
-	if (! (bufev = mm_calloc(1, sizeof(struct bufferevent_pair))))
-		return NULL;
-	if (bufferevent_init_common_(&bufev->bev, base, &bufferevent_ops_pair,
-		options)) {
-		mm_free(bufev);
-		return NULL;
-	}
-	if (!evbuffer_add_cb(bufev->bev.bev.output, be_pair_outbuf_cb, bufev)) {
-		bufferevent_free(downcast(bufev));
-		return NULL;
-	}
-
-	bufferevent_init_generic_timeout_cbs_(&bufev->bev.bev);
-
-	return bufev;
-}
-
-int
-bufferevent_pair_new(struct event_base *base, int options,
-    struct bufferevent *pair[2])
-{
-	struct bufferevent_pair *bufev1 = NULL, *bufev2 = NULL;
-	int tmp_options;
-
-	options |= BEV_OPT_DEFER_CALLBACKS;
-	tmp_options = options & ~BEV_OPT_THREADSAFE;
-
-	bufev1 = bufferevent_pair_elt_new(base, options);
-	if (!bufev1)
-		return -1;
-	bufev2 = bufferevent_pair_elt_new(base, tmp_options);
-	if (!bufev2) {
-		bufferevent_free(downcast(bufev1));
-		return -1;
-	}
-
-	if (options & BEV_OPT_THREADSAFE) {
-		/*XXXX check return */
-		bufferevent_enable_locking_(downcast(bufev2), bufev1->bev.lock);
-	}
-
-	bufev1->partner = bufev2;
-	bufev2->partner = bufev1;
-
-	evbuffer_freeze(downcast(bufev1)->input, 0);
-	evbuffer_freeze(downcast(bufev1)->output, 1);
-	evbuffer_freeze(downcast(bufev2)->input, 0);
-	evbuffer_freeze(downcast(bufev2)->output, 1);
-
-	pair[0] = downcast(bufev1);
-	pair[1] = downcast(bufev2);
-
-	return 0;
-}
-
-static void
-be_pair_transfer(struct bufferevent *src, struct bufferevent *dst,
-    int ignore_wm)
-{
-	size_t dst_size;
-	size_t n;
-
-	evbuffer_unfreeze(src->output, 1);
-	evbuffer_unfreeze(dst->input, 0);
-
-	if (dst->wm_read.high) {
-		dst_size = evbuffer_get_length(dst->input);
-		if (dst_size < dst->wm_read.high) {
-			n = dst->wm_read.high - dst_size;
-			evbuffer_remove_buffer(src->output, dst->input, n);
-		} else {
-			if (!ignore_wm)
-				goto done;
-			n = evbuffer_get_length(src->output);
-			evbuffer_add_buffer(dst->input, src->output);
-		}
-	} else {
-		n = evbuffer_get_length(src->output);
-		evbuffer_add_buffer(dst->input, src->output);
-	}
-
-	if (n) {
-		BEV_RESET_GENERIC_READ_TIMEOUT(dst);
-
-		if (evbuffer_get_length(dst->output))
-			BEV_RESET_GENERIC_WRITE_TIMEOUT(dst);
-		else
-			BEV_DEL_GENERIC_WRITE_TIMEOUT(dst);
-	}
-
-	bufferevent_trigger_nolock_(dst, EV_READ, 0);
-	bufferevent_trigger_nolock_(src, EV_WRITE, 0);
-done:
-	evbuffer_freeze(src->output, 1);
-	evbuffer_freeze(dst->input, 0);
-}
-
-static inline int
-be_pair_wants_to_talk(struct bufferevent_pair *src,
-    struct bufferevent_pair *dst)
-{
-	return (downcast(src)->enabled & EV_WRITE) &&
-	    (downcast(dst)->enabled & EV_READ) &&
-	    !dst->bev.read_suspended &&
-	    evbuffer_get_length(downcast(src)->output);
-}
-
-static void
-be_pair_outbuf_cb(struct evbuffer *outbuf,
-    const struct evbuffer_cb_info *info, void *arg)
-{
-	struct bufferevent_pair *bev_pair = arg;
-	struct bufferevent_pair *partner = bev_pair->partner;
-
-	incref_and_lock(downcast(bev_pair));
-
-	if (info->n_added > info->n_deleted && partner) {
-		/* We got more data.  If the other side's reading, then
-		   hand it over. */
-		if (be_pair_wants_to_talk(bev_pair, partner)) {
-			be_pair_transfer(downcast(bev_pair), downcast(partner), 0);
-		}
-	}
-
-	decref_and_unlock(downcast(bev_pair));
-}
-
-static int
-be_pair_enable(struct bufferevent *bufev, short events)
-{
-	struct bufferevent_pair *bev_p = upcast(bufev);
-	struct bufferevent_pair *partner = bev_p->partner;
-
-	incref_and_lock(bufev);
-
-	if (events & EV_READ) {
-		BEV_RESET_GENERIC_READ_TIMEOUT(bufev);
-	}
-	if ((events & EV_WRITE) && evbuffer_get_length(bufev->output))
-		BEV_RESET_GENERIC_WRITE_TIMEOUT(bufev);
-
-	/* We're starting to read! Does the other side have anything to write?*/
-	if ((events & EV_READ) && partner &&
-	    be_pair_wants_to_talk(partner, bev_p)) {
-		be_pair_transfer(downcast(partner), bufev, 0);
-	}
-	/* We're starting to write! Does the other side want to read? */
-	if ((events & EV_WRITE) && partner &&
-	    be_pair_wants_to_talk(bev_p, partner)) {
-		be_pair_transfer(bufev, downcast(partner), 0);
-	}
-	decref_and_unlock(bufev);
-	return 0;
-}
-
-static int
-be_pair_disable(struct bufferevent *bev, short events)
-{
-	if (events & EV_READ) {
-		BEV_DEL_GENERIC_READ_TIMEOUT(bev);
-	}
-	if (events & EV_WRITE) {
-		BEV_DEL_GENERIC_WRITE_TIMEOUT(bev);
-	}
-	return 0;
-}
-
-static void
-be_pair_unlink(struct bufferevent *bev)
-{
-	struct bufferevent_pair *bev_p = upcast(bev);
-
-	if (bev_p->partner) {
-		bev_p->unlinked_partner = bev_p->partner;
-		bev_p->partner->partner = NULL;
-		bev_p->partner = NULL;
-	}
-}
-
-/* Free *shared* lock in the latest be (since we share it between two of them). */
-static void
-be_pair_destruct(struct bufferevent *bev)
-{
-	struct bufferevent_pair *bev_p = upcast(bev);
-
-	/* Transfer ownership of the lock into partner, otherwise we will use
-	 * already free'd lock during freeing second bev, see next example:
-	 *
-	 * bev1->own_lock = 1
-	 * bev2->own_lock = 0
-	 * bev2->lock = bev1->lock
-	 *
-	 * bufferevent_free(bev1) # refcnt == 0 -> unlink
-	 * bufferevent_free(bev2) # refcnt == 0 -> unlink
-	 *
-	 * event_base_free() -> finilizers -> EVTHREAD_FREE_LOCK(bev1->lock)
-	 *                                 -> BEV_LOCK(bev2->lock) <-- already freed
-	 *
-	 * Where bev1 == pair[0], bev2 == pair[1].
-	 */
-	if (bev_p->unlinked_partner && bev_p->bev.own_lock) {
-		bev_p->unlinked_partner->bev.own_lock = 1;
-		bev_p->bev.own_lock = 0;
-	}
-	bev_p->unlinked_partner = NULL;
-}
-
-static int
-be_pair_flush(struct bufferevent *bev, short iotype,
-    enum bufferevent_flush_mode mode)
-{
-	struct bufferevent_pair *bev_p = upcast(bev);
-	struct bufferevent *partner;
-
-	if (!bev_p->partner)
-		return -1;
-
-	if (mode == BEV_NORMAL)
-		return 0;
-
-	incref_and_lock(bev);
-
-	partner = downcast(bev_p->partner);
-
-	if ((iotype & EV_READ) != 0)
-		be_pair_transfer(partner, bev, 1);
-
-	if ((iotype & EV_WRITE) != 0)
-		be_pair_transfer(bev, partner, 1);
-
-	if (mode == BEV_FINISHED) {
-		bufferevent_run_eventcb_(partner, iotype|BEV_EVENT_EOF, 0);
-	}
-	decref_and_unlock(bev);
-	return 0;
-}
-
-struct bufferevent *
-bufferevent_pair_get_partner(struct bufferevent *bev)
-{
-	struct bufferevent_pair *bev_p;
-	struct bufferevent *partner = NULL;
-	bev_p = upcast(bev);
-	if (! bev_p)
-		return NULL;
-
-	incref_and_lock(bev);
-	if (bev_p->partner)
-		partner = downcast(bev_p->partner);
-	decref_and_unlock(bev);
-	return partner;
-}
-
-const struct bufferevent_ops bufferevent_ops_pair = {
-	"pair_elt",
-	evutil_offsetof(struct bufferevent_pair, bev.bev),
-	be_pair_enable,
-	be_pair_disable,
-	be_pair_unlink,
-	be_pair_destruct,
-	bufferevent_generic_adj_timeouts_,
-	be_pair_flush,
-	NULL, /* ctrl */
-};