add windows platform to ydb github export

5 files changed, 2057 insertions, 0 deletions

diff --git a/contrib/libs/libevent/buffer_iocp.c b/contrib/libs/libevent/buffer_iocp.c
new file mode 100644
index 00000000000..2af0c49cc64
--- /dev/null
+++ b/contrib/libs/libevent/buffer_iocp.c
@@ -0,0 +1,327 @@
+/*
+ * Copyright (c) 2009-2012 Niels Provos and 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.
+ */
+
+/**
+   @file buffer_iocp.c
+
+   This module implements overlapped read and write functions for evbuffer
+   objects on Windows.
+*/
+#include "event2/event-config.h"
+#include "evconfig-private.h"
+
+#include "event2/buffer.h"
+#include "event2/buffer_compat.h"
+#include "event2/util.h"
+#include "event2/thread.h"
+#include "util-internal.h"
+#include "evthread-internal.h"
+#include "evbuffer-internal.h"
+#include "iocp-internal.h"
+#include "mm-internal.h"
+
+#include <winsock2.h>
+#include <winerror.h>
+#include <windows.h>
+#include <stdio.h>
+
+#define MAX_WSABUFS 16
+
+/** An evbuffer that can handle overlapped IO. */
+struct evbuffer_overlapped {
+	struct evbuffer buffer;
+	/** The socket that we're doing overlapped IO on. */
+	evutil_socket_t fd;
+
+	/** pending I/O type */
+	unsigned read_in_progress : 1;
+	unsigned write_in_progress : 1;
+
+	/** The first pinned chain in the buffer. */
+	struct evbuffer_chain *first_pinned;
+
+	/** How many chains are pinned; how many of the fields in buffers
+	 * are we using. */
+	int n_buffers;
+	WSABUF buffers[MAX_WSABUFS];
+};
+
+/** Given an evbuffer, return the correponding evbuffer structure, or NULL if
+ * the evbuffer isn't overlapped. */
+static inline struct evbuffer_overlapped *
+upcast_evbuffer(struct evbuffer *buf)
+{
+	if (!buf || !buf->is_overlapped)
+		return NULL;
+	return EVUTIL_UPCAST(buf, struct evbuffer_overlapped, buffer);
+}
+
+/** Unpin all the chains noted as pinned in 'eo'. */
+static void
+pin_release(struct evbuffer_overlapped *eo, unsigned flag)
+{
+	int i;
+	struct evbuffer_chain *next, *chain = eo->first_pinned;
+
+	for (i = 0; i < eo->n_buffers; ++i) {
+		EVUTIL_ASSERT(chain);
+		next = chain->next;
+		evbuffer_chain_unpin_(chain, flag);
+		chain = next;
+	}
+}
+
+void
+evbuffer_commit_read_(struct evbuffer *evbuf, ev_ssize_t nBytes)
+{
+	struct evbuffer_overlapped *buf = upcast_evbuffer(evbuf);
+	struct evbuffer_chain **chainp;
+	size_t remaining, len;
+	unsigned i;
+
+	EVBUFFER_LOCK(evbuf);
+	EVUTIL_ASSERT(buf->read_in_progress && !buf->write_in_progress);
+	EVUTIL_ASSERT(nBytes >= 0); /* XXXX Can this be false? */
+
+	evbuffer_unfreeze(evbuf, 0);
+
+	chainp = evbuf->last_with_datap;
+	if (!((*chainp)->flags & EVBUFFER_MEM_PINNED_R))
+		chainp = &(*chainp)->next;
+	remaining = nBytes;
+	for (i = 0; remaining > 0 && i < (unsigned)buf->n_buffers; ++i) {
+		EVUTIL_ASSERT(*chainp);
+		len = buf->buffers[i].len;
+		if (remaining < len)
+			len = remaining;
+		(*chainp)->off += len;
+		evbuf->last_with_datap = chainp;
+		remaining -= len;
+		chainp = &(*chainp)->next;
+	}
+
+	pin_release(buf, EVBUFFER_MEM_PINNED_R);
+
+	buf->read_in_progress = 0;
+
+	evbuf->total_len += nBytes;
+	evbuf->n_add_for_cb += nBytes;
+
+	evbuffer_invoke_callbacks_(evbuf);
+
+	evbuffer_decref_and_unlock_(evbuf);
+}
+
+void
+evbuffer_commit_write_(struct evbuffer *evbuf, ev_ssize_t nBytes)
+{
+	struct evbuffer_overlapped *buf = upcast_evbuffer(evbuf);
+
+	EVBUFFER_LOCK(evbuf);
+	EVUTIL_ASSERT(buf->write_in_progress && !buf->read_in_progress);
+	evbuffer_unfreeze(evbuf, 1);
+	evbuffer_drain(evbuf, nBytes);
+	pin_release(buf,EVBUFFER_MEM_PINNED_W);
+	buf->write_in_progress = 0;
+	evbuffer_decref_and_unlock_(evbuf);
+}
+
+struct evbuffer *
+evbuffer_overlapped_new_(evutil_socket_t fd)
+{
+	struct evbuffer_overlapped *evo;
+
+	evo = mm_calloc(1, sizeof(struct evbuffer_overlapped));
+	if (!evo)
+		return NULL;
+
+	LIST_INIT(&evo->buffer.callbacks);
+	evo->buffer.refcnt = 1;
+	evo->buffer.last_with_datap = &evo->buffer.first;
+
+	evo->buffer.is_overlapped = 1;
+	evo->fd = fd;
+
+	return &evo->buffer;
+}
+
+int
+evbuffer_launch_write_(struct evbuffer *buf, ev_ssize_t at_most,
+		struct event_overlapped *ol)
+{
+	struct evbuffer_overlapped *buf_o = upcast_evbuffer(buf);
+	int r = -1;
+	int i;
+	struct evbuffer_chain *chain;
+	DWORD bytesSent;
+
+	if (!buf) {
+		/* No buffer, or it isn't overlapped */
+		return -1;
+	}
+
+	EVBUFFER_LOCK(buf);
+	EVUTIL_ASSERT(!buf_o->read_in_progress);
+	if (buf->freeze_start || buf_o->write_in_progress)
+		goto done;
+	if (!buf->total_len) {
+		/* Nothing to write */
+		r = 0;
+		goto done;
+	} else if (at_most < 0 || (size_t)at_most > buf->total_len) {
+		at_most = buf->total_len;
+	}
+	evbuffer_freeze(buf, 1);
+
+	buf_o->first_pinned = NULL;
+	buf_o->n_buffers = 0;
+	memset(buf_o->buffers, 0, sizeof(buf_o->buffers));
+
+	chain = buf_o->first_pinned = buf->first;
+
+	for (i=0; i < MAX_WSABUFS && chain; ++i, chain=chain->next) {
+		WSABUF *b = &buf_o->buffers[i];
+		b->buf = (char*)( chain->buffer + chain->misalign );
+		evbuffer_chain_pin_(chain, EVBUFFER_MEM_PINNED_W);
+
+		if ((size_t)at_most > chain->off) {
+			/* XXXX Cast is safe for now, since win32 has no
+			   mmaped chains.  But later, we need to have this
+			   add more WSAbufs if chain->off is greater than
+			   ULONG_MAX */
+			b->len = (unsigned long)chain->off;
+			at_most -= chain->off;
+		} else {
+			b->len = (unsigned long)at_most;
+			++i;
+			break;
+		}
+	}
+
+	buf_o->n_buffers = i;
+	evbuffer_incref_(buf);
+	if (WSASend(buf_o->fd, buf_o->buffers, i, &bytesSent, 0,
+		&ol->overlapped, NULL)) {
+		int error = WSAGetLastError();
+		if (error != WSA_IO_PENDING) {
+			/* An actual error. */
+			pin_release(buf_o, EVBUFFER_MEM_PINNED_W);
+			evbuffer_unfreeze(buf, 1);
+			evbuffer_free(buf); /* decref */
+			goto done;
+		}
+	}
+
+	buf_o->write_in_progress = 1;
+	r = 0;
+done:
+	EVBUFFER_UNLOCK(buf);
+	return r;
+}
+
+int
+evbuffer_launch_read_(struct evbuffer *buf, size_t at_most,
+		struct event_overlapped *ol)
+{
+	struct evbuffer_overlapped *buf_o = upcast_evbuffer(buf);
+	int r = -1, i;
+	int nvecs;
+	int npin=0;
+	struct evbuffer_chain *chain=NULL, **chainp;
+	DWORD bytesRead;
+	DWORD flags = 0;
+	struct evbuffer_iovec vecs[MAX_WSABUFS];
+
+	if (!buf_o)
+		return -1;
+	EVBUFFER_LOCK(buf);
+	EVUTIL_ASSERT(!buf_o->write_in_progress);
+	if (buf->freeze_end || buf_o->read_in_progress)
+		goto done;
+
+	buf_o->first_pinned = NULL;
+	buf_o->n_buffers = 0;
+	memset(buf_o->buffers, 0, sizeof(buf_o->buffers));
+
+	if (evbuffer_expand_fast_(buf, at_most, MAX_WSABUFS) == -1)
+		goto done;
+	evbuffer_freeze(buf, 0);
+
+	nvecs = evbuffer_read_setup_vecs_(buf, at_most,
+	    vecs, MAX_WSABUFS, &chainp, 1);
+	for (i=0;i<nvecs;++i) {
+		WSABUF_FROM_EVBUFFER_IOV(
+			&buf_o->buffers[i],
+			&vecs[i]);
+	}
+
+	buf_o->n_buffers = nvecs;
+	buf_o->first_pinned = chain = *chainp;
+
+	npin=0;
+	for ( ; chain; chain = chain->next) {
+		evbuffer_chain_pin_(chain, EVBUFFER_MEM_PINNED_R);
+		++npin;
+	}
+	EVUTIL_ASSERT(npin == nvecs);
+
+	evbuffer_incref_(buf);
+	if (WSARecv(buf_o->fd, buf_o->buffers, nvecs, &bytesRead, &flags,
+		    &ol->overlapped, NULL)) {
+		int error = WSAGetLastError();
+		if (error != WSA_IO_PENDING) {
+			/* An actual error. */
+			pin_release(buf_o, EVBUFFER_MEM_PINNED_R);
+			evbuffer_unfreeze(buf, 0);
+			evbuffer_free(buf); /* decref */
+			goto done;
+		}
+	}
+
+	buf_o->read_in_progress = 1;
+	r = 0;
+done:
+	EVBUFFER_UNLOCK(buf);
+	return r;
+}
+
+evutil_socket_t
+evbuffer_overlapped_get_fd_(struct evbuffer *buf)
+{
+	struct evbuffer_overlapped *buf_o = upcast_evbuffer(buf);
+	return buf_o ? buf_o->fd : -1;
+}
+
+void
+evbuffer_overlapped_set_fd_(struct evbuffer *buf, evutil_socket_t fd)
+{
+	struct evbuffer_overlapped *buf_o = upcast_evbuffer(buf);
+	EVBUFFER_LOCK(buf);
+	/* XXX is this right?, should it cancel current I/O operations? */
+	if (buf_o)
+		buf_o->fd = fd;
+	EVBUFFER_UNLOCK(buf);
+}
diff --git a/contrib/libs/libevent/bufferevent_async.c b/contrib/libs/libevent/bufferevent_async.c
new file mode 100644
index 00000000000..40c7c5e8d0d
--- /dev/null
+++ b/contrib/libs/libevent/bufferevent_async.c
@@ -0,0 +1,706 @@
+/*
+ * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson
+ *
+ * All rights reserved.
+ *
+ * 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"
+
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef EVENT__HAVE_STDARG_H
+#include <stdarg.h>
+#endif
+#ifdef EVENT__HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef _WIN32
+#include <winsock2.h>
+#include <winerror.h>
+#include <ws2tcpip.h>
+#endif
+
+#include <sys/queue.h>
+
+#include "event2/util.h"
+#include "event2/bufferevent.h"
+#include "event2/buffer.h"
+#include "event2/bufferevent_struct.h"
+#include "event2/event.h"
+#include "event2/util.h"
+#include "event-internal.h"
+#include "log-internal.h"
+#include "mm-internal.h"
+#include "bufferevent-internal.h"
+#include "util-internal.h"
+#include "iocp-internal.h"
+
+#ifndef SO_UPDATE_CONNECT_CONTEXT
+/* Mingw is sometimes missing this */
+#define SO_UPDATE_CONNECT_CONTEXT 0x7010
+#endif
+
+/* prototypes */
+static int be_async_enable(struct bufferevent *, short);
+static int be_async_disable(struct bufferevent *, short);
+static void be_async_destruct(struct bufferevent *);
+static int be_async_flush(struct bufferevent *, short, enum bufferevent_flush_mode);
+static int be_async_ctrl(struct bufferevent *, enum bufferevent_ctrl_op, union bufferevent_ctrl_data *);
+
+struct bufferevent_async {
+	struct bufferevent_private bev;
+	struct event_overlapped connect_overlapped;
+	struct event_overlapped read_overlapped;
+	struct event_overlapped write_overlapped;
+	size_t read_in_progress;
+	size_t write_in_progress;
+	unsigned ok : 1;
+	unsigned read_added : 1;
+	unsigned write_added : 1;
+};
+
+const struct bufferevent_ops bufferevent_ops_async = {
+	"socket_async",
+	evutil_offsetof(struct bufferevent_async, bev.bev),
+	be_async_enable,
+	be_async_disable,
+	NULL, /* Unlink */
+	be_async_destruct,
+	bufferevent_generic_adj_timeouts_,
+	be_async_flush,
+	be_async_ctrl,
+};
+
+static inline void
+be_async_run_eventcb(struct bufferevent *bev, short what, int options)
+{ bufferevent_run_eventcb_(bev, what, options|BEV_TRIG_DEFER_CALLBACKS); }
+
+static inline void
+be_async_trigger_nolock(struct bufferevent *bev, short what, int options)
+{ bufferevent_trigger_nolock_(bev, what, options|BEV_TRIG_DEFER_CALLBACKS); }
+
+static inline int
+fatal_error(int err)
+{
+	switch (err) {
+		/* We may have already associated this fd with a port.
+		 * Let's hope it's this port, and that the error code
+		 * for doing this neer changes. */
+		case ERROR_INVALID_PARAMETER:
+			return 0;
+	}
+	return 1;
+}
+
+static inline struct bufferevent_async *
+upcast(struct bufferevent *bev)
+{
+	struct bufferevent_async *bev_a;
+	if (!BEV_IS_ASYNC(bev))
+		return NULL;
+	bev_a = EVUTIL_UPCAST(bev, struct bufferevent_async, bev.bev);
+	return bev_a;
+}
+
+static inline struct bufferevent_async *
+upcast_connect(struct event_overlapped *eo)
+{
+	struct bufferevent_async *bev_a;
+	bev_a = EVUTIL_UPCAST(eo, struct bufferevent_async, connect_overlapped);
+	EVUTIL_ASSERT(BEV_IS_ASYNC(&bev_a->bev.bev));
+	return bev_a;
+}
+
+static inline struct bufferevent_async *
+upcast_read(struct event_overlapped *eo)
+{
+	struct bufferevent_async *bev_a;
+	bev_a = EVUTIL_UPCAST(eo, struct bufferevent_async, read_overlapped);
+	EVUTIL_ASSERT(BEV_IS_ASYNC(&bev_a->bev.bev));
+	return bev_a;
+}
+
+static inline struct bufferevent_async *
+upcast_write(struct event_overlapped *eo)
+{
+	struct bufferevent_async *bev_a;
+	bev_a = EVUTIL_UPCAST(eo, struct bufferevent_async, write_overlapped);
+	EVUTIL_ASSERT(BEV_IS_ASYNC(&bev_a->bev.bev));
+	return bev_a;
+}
+
+static void
+bev_async_del_write(struct bufferevent_async *beva)
+{
+	struct bufferevent *bev = &beva->bev.bev;
+
+	if (beva->write_added) {
+		beva->write_added = 0;
+		event_base_del_virtual_(bev->ev_base);
+	}
+}
+
+static void
+bev_async_del_read(struct bufferevent_async *beva)
+{
+	struct bufferevent *bev = &beva->bev.bev;
+
+	if (beva->read_added) {
+		beva->read_added = 0;
+		event_base_del_virtual_(bev->ev_base);
+	}
+}
+
+static void
+bev_async_add_write(struct bufferevent_async *beva)
+{
+	struct bufferevent *bev = &beva->bev.bev;
+
+	if (!beva->write_added) {
+		beva->write_added = 1;
+		event_base_add_virtual_(bev->ev_base);
+	}
+}
+
+static void
+bev_async_add_read(struct bufferevent_async *beva)
+{
+	struct bufferevent *bev = &beva->bev.bev;
+
+	if (!beva->read_added) {
+		beva->read_added = 1;
+		event_base_add_virtual_(bev->ev_base);
+	}
+}
+
+static void
+bev_async_consider_writing(struct bufferevent_async *beva)
+{
+	size_t at_most;
+	int limit;
+	struct bufferevent *bev = &beva->bev.bev;
+
+	/* Don't write if there's a write in progress, or we do not
+	 * want to write, or when there's nothing left to write. */
+	if (beva->write_in_progress || beva->bev.connecting)
+		return;
+	if (!beva->ok || !(bev->enabled&EV_WRITE) ||
+	    !evbuffer_get_length(bev->output)) {
+		bev_async_del_write(beva);
+		return;
+	}
+
+	at_most = evbuffer_get_length(bev->output);
+
+	/* This is safe so long as bufferevent_get_write_max never returns
+	 * more than INT_MAX.  That's true for now. XXXX */
+	limit = (int)bufferevent_get_write_max_(&beva->bev);
+	if (at_most >= (size_t)limit && limit >= 0)
+		at_most = limit;
+
+	if (beva->bev.write_suspended) {
+		bev_async_del_write(beva);
+		return;
+	}
+
+	/*  XXXX doesn't respect low-water mark very well. */
+	bufferevent_incref_(bev);
+	if (evbuffer_launch_write_(bev->output, at_most,
+	    &beva->write_overlapped)) {
+		bufferevent_decref_(bev);
+		beva->ok = 0;
+		be_async_run_eventcb(bev, BEV_EVENT_ERROR, 0);
+	} else {
+		beva->write_in_progress = at_most;
+		bufferevent_decrement_write_buckets_(&beva->bev, at_most);
+		bev_async_add_write(beva);
+	}
+}
+
+static void
+bev_async_consider_reading(struct bufferevent_async *beva)
+{
+	size_t cur_size;
+	size_t read_high;
+	size_t at_most;
+	int limit;
+	struct bufferevent *bev = &beva->bev.bev;
+
+	/* Don't read if there is a read in progress, or we do not
+	 * want to read. */
+	if (beva->read_in_progress || beva->bev.connecting)
+		return;
+	if (!beva->ok || !(bev->enabled&EV_READ)) {
+		bev_async_del_read(beva);
+		return;
+	}
+
+	/* Don't read if we're full */
+	cur_size = evbuffer_get_length(bev->input);
+	read_high = bev->wm_read.high;
+	if (read_high) {
+		if (cur_size >= read_high) {
+			bev_async_del_read(beva);
+			return;
+		}
+		at_most = read_high - cur_size;
+	} else {
+		at_most = 16384; /* FIXME totally magic. */
+	}
+
+	/* XXXX This over-commits. */
+	/* XXXX see also not above on cast on bufferevent_get_write_max_() */
+	limit = (int)bufferevent_get_read_max_(&beva->bev);
+	if (at_most >= (size_t)limit && limit >= 0)
+		at_most = limit;
+
+	if (beva->bev.read_suspended) {
+		bev_async_del_read(beva);
+		return;
+	}
+
+	bufferevent_incref_(bev);
+	if (evbuffer_launch_read_(bev->input, at_most, &beva->read_overlapped)) {
+		beva->ok = 0;
+		be_async_run_eventcb(bev, BEV_EVENT_ERROR, 0);
+		bufferevent_decref_(bev);
+	} else {
+		beva->read_in_progress = at_most;
+		bufferevent_decrement_read_buckets_(&beva->bev, at_most);
+		bev_async_add_read(beva);
+	}
+
+	return;
+}
+
+static void
+be_async_outbuf_callback(struct evbuffer *buf,
+    const struct evbuffer_cb_info *cbinfo,
+    void *arg)
+{
+	struct bufferevent *bev = arg;
+	struct bufferevent_async *bev_async = upcast(bev);
+
+	/* If we added data to the outbuf and were not writing before,
+	 * we may want to write now. */
+
+	bufferevent_incref_and_lock_(bev);
+
+	if (cbinfo->n_added)
+		bev_async_consider_writing(bev_async);
+
+	bufferevent_decref_and_unlock_(bev);
+}
+
+static void
+be_async_inbuf_callback(struct evbuffer *buf,
+    const struct evbuffer_cb_info *cbinfo,
+    void *arg)
+{
+	struct bufferevent *bev = arg;
+	struct bufferevent_async *bev_async = upcast(bev);
+
+	/* If we drained data from the inbuf and were not reading before,
+	 * we may want to read now */
+
+	bufferevent_incref_and_lock_(bev);
+
+	if (cbinfo->n_deleted)
+		bev_async_consider_reading(bev_async);
+
+	bufferevent_decref_and_unlock_(bev);
+}
+
+static int
+be_async_enable(struct bufferevent *buf, short what)
+{
+	struct bufferevent_async *bev_async = upcast(buf);
+
+	if (!bev_async->ok)
+		return -1;
+
+	if (bev_async->bev.connecting) {
+		/* Don't launch anything during connection attempts. */
+		return 0;
+	}
+
+	if (what & EV_READ)
+		BEV_RESET_GENERIC_READ_TIMEOUT(buf);
+	if (what & EV_WRITE)
+		BEV_RESET_GENERIC_WRITE_TIMEOUT(buf);
+
+	/* If we newly enable reading or writing, and we aren't reading or
+	   writing already, consider launching a new read or write. */
+
+	if (what & EV_READ)
+		bev_async_consider_reading(bev_async);
+	if (what & EV_WRITE)
+		bev_async_consider_writing(bev_async);
+	return 0;
+}
+
+static int
+be_async_disable(struct bufferevent *bev, short what)
+{
+	struct bufferevent_async *bev_async = upcast(bev);
+	/* XXXX If we disable reading or writing, we may want to consider
+	 * canceling any in-progress read or write operation, though it might
+	 * not work. */
+
+	if (what & EV_READ) {
+		BEV_DEL_GENERIC_READ_TIMEOUT(bev);
+		bev_async_del_read(bev_async);
+	}
+	if (what & EV_WRITE) {
+		BEV_DEL_GENERIC_WRITE_TIMEOUT(bev);
+		bev_async_del_write(bev_async);
+	}
+
+	return 0;
+}
+
+static void
+be_async_destruct(struct bufferevent *bev)
+{
+	struct bufferevent_async *bev_async = upcast(bev);
+	struct bufferevent_private *bev_p = BEV_UPCAST(bev);
+	evutil_socket_t fd;
+
+	EVUTIL_ASSERT(!upcast(bev)->write_in_progress &&
+			!upcast(bev)->read_in_progress);
+
+	bev_async_del_read(bev_async);
+	bev_async_del_write(bev_async);
+
+	fd = evbuffer_overlapped_get_fd_(bev->input);
+	if (fd != (evutil_socket_t)EVUTIL_INVALID_SOCKET &&
+		(bev_p->options & BEV_OPT_CLOSE_ON_FREE)) {
+		evutil_closesocket(fd);
+		evbuffer_overlapped_set_fd_(bev->input, EVUTIL_INVALID_SOCKET);
+	}
+}
+
+/* GetQueuedCompletionStatus doesn't reliably yield WSA error codes, so
+ * we use WSAGetOverlappedResult to translate. */
+static void
+bev_async_set_wsa_error(struct bufferevent *bev, struct event_overlapped *eo)
+{
+	DWORD bytes, flags;
+	evutil_socket_t fd;
+
+	fd = evbuffer_overlapped_get_fd_(bev->input);
+	WSAGetOverlappedResult(fd, &eo->overlapped, &bytes, FALSE, &flags);
+}
+
+static int
+be_async_flush(struct bufferevent *bev, short what,
+    enum bufferevent_flush_mode mode)
+{
+	return 0;
+}
+
+static void
+connect_complete(struct event_overlapped *eo, ev_uintptr_t key,
+    ev_ssize_t nbytes, int ok)
+{
+	struct bufferevent_async *bev_a = upcast_connect(eo);
+	struct bufferevent *bev = &bev_a->bev.bev;
+	evutil_socket_t sock;
+
+	BEV_LOCK(bev);
+
+	EVUTIL_ASSERT(bev_a->bev.connecting);
+	bev_a->bev.connecting = 0;
+	sock = evbuffer_overlapped_get_fd_(bev_a->bev.bev.input);
+	/* XXXX Handle error? */
+	setsockopt(sock, SOL_SOCKET, SO_UPDATE_CONNECT_CONTEXT, NULL, 0);
+
+	if (ok)
+		bufferevent_async_set_connected_(bev);
+	else
+		bev_async_set_wsa_error(bev, eo);
+
+	be_async_run_eventcb(bev, ok ? BEV_EVENT_CONNECTED : BEV_EVENT_ERROR, 0);
+
+	event_base_del_virtual_(bev->ev_base);
+
+	bufferevent_decref_and_unlock_(bev);
+}
+
+static void
+read_complete(struct event_overlapped *eo, ev_uintptr_t key,
+    ev_ssize_t nbytes, int ok)
+{
+	struct bufferevent_async *bev_a = upcast_read(eo);
+	struct bufferevent *bev = &bev_a->bev.bev;
+	short what = BEV_EVENT_READING;
+	ev_ssize_t amount_unread;
+	BEV_LOCK(bev);
+	EVUTIL_ASSERT(bev_a->read_in_progress);
+
+	amount_unread = bev_a->read_in_progress - nbytes;
+	evbuffer_commit_read_(bev->input, nbytes);
+	bev_a->read_in_progress = 0;
+	if (amount_unread)
+		bufferevent_decrement_read_buckets_(&bev_a->bev, -amount_unread);
+
+	if (!ok)
+		bev_async_set_wsa_error(bev, eo);
+
+	if (bev_a->ok) {
+		if (ok && nbytes) {
+			BEV_RESET_GENERIC_READ_TIMEOUT(bev);
+			be_async_trigger_nolock(bev, EV_READ, 0);
+			bev_async_consider_reading(bev_a);
+		} else if (!ok) {
+			what |= BEV_EVENT_ERROR;
+			bev_a->ok = 0;
+			be_async_run_eventcb(bev, what, 0);
+		} else if (!nbytes) {
+			what |= BEV_EVENT_EOF;
+			bev_a->ok = 0;
+			be_async_run_eventcb(bev, what, 0);
+		}
+	}
+
+	bufferevent_decref_and_unlock_(bev);
+}
+
+static void
+write_complete(struct event_overlapped *eo, ev_uintptr_t key,
+    ev_ssize_t nbytes, int ok)
+{
+	struct bufferevent_async *bev_a = upcast_write(eo);
+	struct bufferevent *bev = &bev_a->bev.bev;
+	short what = BEV_EVENT_WRITING;
+	ev_ssize_t amount_unwritten;
+
+	BEV_LOCK(bev);
+	EVUTIL_ASSERT(bev_a->write_in_progress);
+
+	amount_unwritten = bev_a->write_in_progress - nbytes;
+	evbuffer_commit_write_(bev->output, nbytes);
+	bev_a->write_in_progress = 0;
+
+	if (amount_unwritten)
+		bufferevent_decrement_write_buckets_(&bev_a->bev,
+		                                     -amount_unwritten);
+
+
+	if (!ok)
+		bev_async_set_wsa_error(bev, eo);
+
+	if (bev_a->ok) {
+		if (ok && nbytes) {
+			BEV_RESET_GENERIC_WRITE_TIMEOUT(bev);
+			be_async_trigger_nolock(bev, EV_WRITE, 0);
+			bev_async_consider_writing(bev_a);
+		} else if (!ok) {
+			what |= BEV_EVENT_ERROR;
+			bev_a->ok = 0;
+			be_async_run_eventcb(bev, what, 0);
+		} else if (!nbytes) {
+			what |= BEV_EVENT_EOF;
+			bev_a->ok = 0;
+			be_async_run_eventcb(bev, what, 0);
+		}
+	}
+
+	bufferevent_decref_and_unlock_(bev);
+}
+
+struct bufferevent *
+bufferevent_async_new_(struct event_base *base,
+    evutil_socket_t fd, int options)
+{
+	struct bufferevent_async *bev_a;
+	struct bufferevent *bev;
+	struct event_iocp_port *iocp;
+
+	options |= BEV_OPT_THREADSAFE;
+
+	if (!(iocp = event_base_get_iocp_(base)))
+		return NULL;
+
+	if (fd >= 0 && event_iocp_port_associate_(iocp, fd, 1)<0) {
+		if (fatal_error(GetLastError()))
+			return NULL;
+	}
+
+	if (!(bev_a = mm_calloc(1, sizeof(struct bufferevent_async))))
+		return NULL;
+
+	bev = &bev_a->bev.bev;
+	if (!(bev->input = evbuffer_overlapped_new_(fd))) {
+		mm_free(bev_a);
+		return NULL;
+	}
+	if (!(bev->output = evbuffer_overlapped_new_(fd))) {
+		evbuffer_free(bev->input);
+		mm_free(bev_a);
+		return NULL;
+	}
+
+	if (bufferevent_init_common_(&bev_a->bev, base, &bufferevent_ops_async,
+		options)<0)
+		goto err;
+
+	evbuffer_add_cb(bev->input, be_async_inbuf_callback, bev);
+	evbuffer_add_cb(bev->output, be_async_outbuf_callback, bev);
+
+	event_overlapped_init_(&bev_a->connect_overlapped, connect_complete);
+	event_overlapped_init_(&bev_a->read_overlapped, read_complete);
+	event_overlapped_init_(&bev_a->write_overlapped, write_complete);
+
+	bufferevent_init_generic_timeout_cbs_(bev);
+
+	bev_a->ok = fd >= 0;
+
+	return bev;
+err:
+	bufferevent_free(&bev_a->bev.bev);
+	return NULL;
+}
+
+void
+bufferevent_async_set_connected_(struct bufferevent *bev)
+{
+	struct bufferevent_async *bev_async = upcast(bev);
+	bev_async->ok = 1;
+	/* Now's a good time to consider reading/writing */
+	be_async_enable(bev, bev->enabled);
+}
+
+int
+bufferevent_async_can_connect_(struct bufferevent *bev)
+{
+	const struct win32_extension_fns *ext =
+	    event_get_win32_extension_fns_();
+
+	if (BEV_IS_ASYNC(bev) &&
+	    event_base_get_iocp_(bev->ev_base) &&
+	    ext && ext->ConnectEx)
+		return 1;
+
+	return 0;
+}
+
+int
+bufferevent_async_connect_(struct bufferevent *bev, evutil_socket_t fd,
+	const struct sockaddr *sa, int socklen)
+{
+	BOOL rc;
+	struct bufferevent_async *bev_async = upcast(bev);
+	struct sockaddr_storage ss;
+	const struct win32_extension_fns *ext =
+	    event_get_win32_extension_fns_();
+
+	EVUTIL_ASSERT(ext && ext->ConnectEx && fd >= 0 && sa != NULL);
+
+	/* ConnectEx() requires that the socket be bound to an address
+	 * with bind() before using, otherwise it will fail. We attempt
+	 * to issue a bind() here, taking into account that the error
+	 * code is set to WSAEINVAL when the socket is already bound. */
+	memset(&ss, 0, sizeof(ss));
+	if (sa->sa_family == AF_INET) {
+		struct sockaddr_in *sin = (struct sockaddr_in *)&ss;
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = INADDR_ANY;
+	} else if (sa->sa_family == AF_INET6) {
+		struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ss;
+		sin6->sin6_family = AF_INET6;
+		sin6->sin6_addr = in6addr_any;
+	} else {
+		/* Well, the user will have to bind() */
+		return -1;
+	}
+	if (bind(fd, (struct sockaddr *)&ss, sizeof(ss)) < 0 &&
+	    WSAGetLastError() != WSAEINVAL)
+		return -1;
+
+	event_base_add_virtual_(bev->ev_base);
+	bufferevent_incref_(bev);
+	rc = ext->ConnectEx(fd, sa, socklen, NULL, 0, NULL,
+			    &bev_async->connect_overlapped.overlapped);
+	if (rc || WSAGetLastError() == ERROR_IO_PENDING)
+		return 0;
+
+	event_base_del_virtual_(bev->ev_base);
+	bufferevent_decref_(bev);
+
+	return -1;
+}
+
+static int
+be_async_ctrl(struct bufferevent *bev, enum bufferevent_ctrl_op op,
+    union bufferevent_ctrl_data *data)
+{
+	switch (op) {
+	case BEV_CTRL_GET_FD:
+		data->fd = evbuffer_overlapped_get_fd_(bev->input);
+		return 0;
+	case BEV_CTRL_SET_FD: {
+		struct bufferevent_async *bev_a = upcast(bev);
+		struct event_iocp_port *iocp;
+
+		if (data->fd == evbuffer_overlapped_get_fd_(bev->input))
+			return 0;
+		if (!(iocp = event_base_get_iocp_(bev->ev_base)))
+			return -1;
+		if (event_iocp_port_associate_(iocp, data->fd, 1) < 0) {
+			if (fatal_error(GetLastError()))
+				return -1;
+		}
+		evbuffer_overlapped_set_fd_(bev->input, data->fd);
+		evbuffer_overlapped_set_fd_(bev->output, data->fd);
+		bev_a->ok = data->fd >= 0;
+		return 0;
+	}
+	case BEV_CTRL_CANCEL_ALL: {
+		struct bufferevent_async *bev_a = upcast(bev);
+		evutil_socket_t fd = evbuffer_overlapped_get_fd_(bev->input);
+		if (fd != (evutil_socket_t)EVUTIL_INVALID_SOCKET &&
+		    (bev_a->bev.options & BEV_OPT_CLOSE_ON_FREE)) {
+			closesocket(fd);
+			evbuffer_overlapped_set_fd_(bev->input, EVUTIL_INVALID_SOCKET);
+		}
+		bev_a->ok = 0;
+		return 0;
+	}
+	case BEV_CTRL_GET_UNDERLYING:
+	default:
+		return -1;
+	}
+}
+
+
diff --git a/contrib/libs/libevent/event_iocp.c b/contrib/libs/libevent/event_iocp.c
new file mode 100644
index 00000000000..6b2a2e15ef8
--- /dev/null
+++ b/contrib/libs/libevent/event_iocp.c
@@ -0,0 +1,294 @@
+/*
+ * 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 "evconfig-private.h"
+
+#ifndef _WIN32_WINNT
+/* Minimum required for InitializeCriticalSectionAndSpinCount */
+#define _WIN32_WINNT 0x0403
+#endif
+#include <winsock2.h>
+#include <windows.h>
+#include <process.h>
+#include <stdio.h>
+#include <mswsock.h>
+
+#include "event2/util.h"
+#include "util-internal.h"
+#include "iocp-internal.h"
+#include "log-internal.h"
+#include "mm-internal.h"
+#include "event-internal.h"
+#include "evthread-internal.h"
+
+#define NOTIFICATION_KEY ((ULONG_PTR)-1)
+
+void
+event_overlapped_init_(struct event_overlapped *o, iocp_callback cb)
+{
+	memset(o, 0, sizeof(struct event_overlapped));
+	o->cb = cb;
+}
+
+static void
+handle_entry(OVERLAPPED *o, ULONG_PTR completion_key, DWORD nBytes, int ok)
+{
+	struct event_overlapped *eo =
+	    EVUTIL_UPCAST(o, struct event_overlapped, overlapped);
+	eo->cb(eo, completion_key, nBytes, ok);
+}
+
+static void
+loop(void *port_)
+{
+	struct event_iocp_port *port = port_;
+	long ms = port->ms;
+	HANDLE p = port->port;
+
+	if (ms <= 0)
+		ms = INFINITE;
+
+	while (1) {
+		OVERLAPPED *overlapped=NULL;
+		ULONG_PTR key=0;
+		DWORD bytes=0;
+		int ok = GetQueuedCompletionStatus(p, &bytes, &key,
+			&overlapped, ms);
+		EnterCriticalSection(&port->lock);
+		if (port->shutdown) {
+			if (--port->n_live_threads == 0)
+				ReleaseSemaphore(port->shutdownSemaphore, 1,
+						NULL);
+			LeaveCriticalSection(&port->lock);
+			return;
+		}
+		LeaveCriticalSection(&port->lock);
+
+		if (key != NOTIFICATION_KEY && overlapped)
+			handle_entry(overlapped, key, bytes, ok);
+		else if (!overlapped)
+			break;
+	}
+	event_warnx("GetQueuedCompletionStatus exited with no event.");
+	EnterCriticalSection(&port->lock);
+	if (--port->n_live_threads == 0)
+		ReleaseSemaphore(port->shutdownSemaphore, 1, NULL);
+	LeaveCriticalSection(&port->lock);
+}
+
+int
+event_iocp_port_associate_(struct event_iocp_port *port, evutil_socket_t fd,
+    ev_uintptr_t key)
+{
+	HANDLE h;
+	h = CreateIoCompletionPort((HANDLE)fd, port->port, key, port->n_threads);
+	if (!h)
+		return -1;
+	return 0;
+}
+
+static void *
+get_extension_function(SOCKET s, const GUID *which_fn)
+{
+	void *ptr = NULL;
+	DWORD bytes=0;
+	WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER,
+	    (GUID*)which_fn, sizeof(*which_fn),
+	    &ptr, sizeof(ptr),
+	    &bytes, NULL, NULL);
+
+	/* No need to detect errors here: if ptr is set, then we have a good
+	   function pointer.  Otherwise, we should behave as if we had no
+	   function pointer.
+	*/
+	return ptr;
+}
+
+/* Mingw doesn't have these in its mswsock.h.  The values are copied from
+   wine.h.   Perhaps if we copy them exactly, the cargo will come again.
+*/
+#ifndef WSAID_ACCEPTEX
+#define WSAID_ACCEPTEX \
+	{0xb5367df1,0xcbac,0x11cf,{0x95,0xca,0x00,0x80,0x5f,0x48,0xa1,0x92}}
+#endif
+#ifndef WSAID_CONNECTEX
+#define WSAID_CONNECTEX \
+	{0x25a207b9,0xddf3,0x4660,{0x8e,0xe9,0x76,0xe5,0x8c,0x74,0x06,0x3e}}
+#endif
+#ifndef WSAID_GETACCEPTEXSOCKADDRS
+#define WSAID_GETACCEPTEXSOCKADDRS \
+	{0xb5367df2,0xcbac,0x11cf,{0x95,0xca,0x00,0x80,0x5f,0x48,0xa1,0x92}}
+#endif
+
+static int extension_fns_initialized = 0;
+
+static void
+init_extension_functions(struct win32_extension_fns *ext)
+{
+	const GUID acceptex = WSAID_ACCEPTEX;
+	const GUID connectex = WSAID_CONNECTEX;
+	const GUID getacceptexsockaddrs = WSAID_GETACCEPTEXSOCKADDRS;
+	SOCKET s = socket(AF_INET, SOCK_STREAM, 0);
+	if (s == EVUTIL_INVALID_SOCKET)
+		return;
+	ext->AcceptEx = get_extension_function(s, &acceptex);
+	ext->ConnectEx = get_extension_function(s, &connectex);
+	ext->GetAcceptExSockaddrs = get_extension_function(s,
+	    &getacceptexsockaddrs);
+	closesocket(s);
+
+	extension_fns_initialized = 1;
+}
+
+static struct win32_extension_fns the_extension_fns;
+
+const struct win32_extension_fns *
+event_get_win32_extension_fns_(void)
+{
+	return &the_extension_fns;
+}
+
+#define N_CPUS_DEFAULT 2
+
+struct event_iocp_port *
+event_iocp_port_launch_(int n_cpus)
+{
+	struct event_iocp_port *port;
+	int i;
+
+	if (!extension_fns_initialized)
+		init_extension_functions(&the_extension_fns);
+
+	if (!(port = mm_calloc(1, sizeof(struct event_iocp_port))))
+		return NULL;
+
+	if (n_cpus <= 0)
+		n_cpus = N_CPUS_DEFAULT;
+	port->n_threads = n_cpus * 2;
+	port->threads = mm_calloc(port->n_threads, sizeof(HANDLE));
+	if (!port->threads)
+		goto err;
+
+	port->port = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0,
+			n_cpus);
+	port->ms = -1;
+	if (!port->port)
+		goto err;
+
+	port->shutdownSemaphore = CreateSemaphore(NULL, 0, 1, NULL);
+	if (!port->shutdownSemaphore)
+		goto err;
+
+	for (i=0; i<port->n_threads; ++i) {
+		ev_uintptr_t th = _beginthread(loop, 0, port);
+		if (th == (ev_uintptr_t)-1)
+			goto err;
+		port->threads[i] = (HANDLE)th;
+		++port->n_live_threads;
+	}
+
+	InitializeCriticalSectionAndSpinCount(&port->lock, 1000);
+
+	return port;
+err:
+	if (port->port)
+		CloseHandle(port->port);
+	if (port->threads)
+		mm_free(port->threads);
+	if (port->shutdownSemaphore)
+		CloseHandle(port->shutdownSemaphore);
+	mm_free(port);
+	return NULL;
+}
+
+static void
+event_iocp_port_unlock_and_free_(struct event_iocp_port *port)
+{
+	DeleteCriticalSection(&port->lock);
+	CloseHandle(port->port);
+	CloseHandle(port->shutdownSemaphore);
+	mm_free(port->threads);
+	mm_free(port);
+}
+
+static int
+event_iocp_notify_all(struct event_iocp_port *port)
+{
+	int i, r, ok=1;
+	for (i=0; i<port->n_threads; ++i) {
+		r = PostQueuedCompletionStatus(port->port, 0, NOTIFICATION_KEY,
+		    NULL);
+		if (!r)
+			ok = 0;
+	}
+	return ok ? 0 : -1;
+}
+
+int
+event_iocp_shutdown_(struct event_iocp_port *port, long waitMsec)
+{
+	DWORD ms = INFINITE;
+	int n;
+
+	EnterCriticalSection(&port->lock);
+	port->shutdown = 1;
+	LeaveCriticalSection(&port->lock);
+	event_iocp_notify_all(port);
+
+	if (waitMsec >= 0)
+		ms = waitMsec;
+
+	WaitForSingleObject(port->shutdownSemaphore, ms);
+	EnterCriticalSection(&port->lock);
+	n = port->n_live_threads;
+	LeaveCriticalSection(&port->lock);
+	if (n == 0) {
+		event_iocp_port_unlock_and_free_(port);
+		return 0;
+	} else {
+		return -1;
+	}
+}
+
+int
+event_iocp_activate_overlapped_(
+    struct event_iocp_port *port, struct event_overlapped *o,
+    ev_uintptr_t key, ev_uint32_t n)
+{
+	BOOL r;
+
+	r = PostQueuedCompletionStatus(port->port, n, key, &o->overlapped);
+	return (r==0) ? -1 : 0;
+}
+
+struct event_iocp_port *
+event_base_get_iocp_(struct event_base *base)
+{
+#ifdef _WIN32
+	return base->iocp;
+#else
+	return NULL;
+#endif
+}
diff --git a/contrib/libs/libevent/evthread_win32.c b/contrib/libs/libevent/evthread_win32.c
new file mode 100644
index 00000000000..2ec80560a5c
--- /dev/null
+++ b/contrib/libs/libevent/evthread_win32.c
@@ -0,0 +1,341 @@
+/*
+ * Copyright 2009-2012 Niels Provos and 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"
+
+#ifdef _WIN32
+#ifndef _WIN32_WINNT
+/* Minimum required for InitializeCriticalSectionAndSpinCount */
+#define _WIN32_WINNT 0x0403
+#endif
+#include <winsock2.h>
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#undef WIN32_LEAN_AND_MEAN
+#include <sys/locking.h>
+#endif
+
+struct event_base;
+#include "event2/thread.h"
+
+#include "mm-internal.h"
+#include "evthread-internal.h"
+#include "time-internal.h"
+
+#define SPIN_COUNT 2000
+
+static void *
+evthread_win32_lock_create(unsigned locktype)
+{
+	CRITICAL_SECTION *lock = mm_malloc(sizeof(CRITICAL_SECTION));
+	if (!lock)
+		return NULL;
+	if (InitializeCriticalSectionAndSpinCount(lock, SPIN_COUNT) == 0) {
+		mm_free(lock);
+		return NULL;
+	}
+	return lock;
+}
+
+static void
+evthread_win32_lock_free(void *lock_, unsigned locktype)
+{
+	CRITICAL_SECTION *lock = lock_;
+	DeleteCriticalSection(lock);
+	mm_free(lock);
+}
+
+static int
+evthread_win32_lock(unsigned mode, void *lock_)
+{
+	CRITICAL_SECTION *lock = lock_;
+	if ((mode & EVTHREAD_TRY)) {
+		return ! TryEnterCriticalSection(lock);
+	} else {
+		EnterCriticalSection(lock);
+		return 0;
+	}
+}
+
+static int
+evthread_win32_unlock(unsigned mode, void *lock_)
+{
+	CRITICAL_SECTION *lock = lock_;
+	LeaveCriticalSection(lock);
+	return 0;
+}
+
+static unsigned long
+evthread_win32_get_id(void)
+{
+	return (unsigned long) GetCurrentThreadId();
+}
+
+#ifdef WIN32_HAVE_CONDITION_VARIABLES
+static void WINAPI (*InitializeConditionVariable_fn)(PCONDITION_VARIABLE)
+	= NULL;
+static BOOL WINAPI (*SleepConditionVariableCS_fn)(
+	PCONDITION_VARIABLE, PCRITICAL_SECTION, DWORD) = NULL;
+static void WINAPI (*WakeAllConditionVariable_fn)(PCONDITION_VARIABLE) = NULL;
+static void WINAPI (*WakeConditionVariable_fn)(PCONDITION_VARIABLE) = NULL;
+
+static int
+evthread_win32_condvar_init(void)
+{
+	HANDLE lib;
+
+	lib = GetModuleHandle(TEXT("kernel32.dll"));
+	if (lib == NULL)
+		return 0;
+
+#define LOAD(name)				\
+	name##_fn = GetProcAddress(lib, #name)
+	LOAD(InitializeConditionVariable);
+	LOAD(SleepConditionVariableCS);
+	LOAD(WakeAllConditionVariable);
+	LOAD(WakeConditionVariable);
+
+	return InitializeConditionVariable_fn && SleepConditionVariableCS_fn &&
+	    WakeAllConditionVariable_fn && WakeConditionVariable_fn;
+}
+
+/* XXXX Even if we can build this, we don't necessarily want to: the functions
+ * in question didn't exist before Vista, so we'd better LoadProc them. */
+static void *
+evthread_win32_condvar_alloc(unsigned condflags)
+{
+	CONDITION_VARIABLE *cond = mm_malloc(sizeof(CONDITION_VARIABLE));
+	if (!cond)
+		return NULL;
+	InitializeConditionVariable_fn(cond);
+	return cond;
+}
+
+static void
+evthread_win32_condvar_free(void *cond_)
+{
+	CONDITION_VARIABLE *cond = cond_;
+	/* There doesn't _seem_ to be a cleaup fn here... */
+	mm_free(cond);
+}
+
+static int
+evthread_win32_condvar_signal(void *cond, int broadcast)
+{
+	CONDITION_VARIABLE *cond = cond_;
+	if (broadcast)
+		WakeAllConditionVariable_fn(cond);
+	else
+		WakeConditionVariable_fn(cond);
+	return 0;
+}
+
+static int
+evthread_win32_condvar_wait(void *cond_, void *lock_, const struct timeval *tv)
+{
+	CONDITION_VARIABLE *cond = cond_;
+	CRITICAL_SECTION *lock = lock_;
+	DWORD ms, err;
+	BOOL result;
+
+	if (tv)
+		ms = evutil_tv_to_msec_(tv);
+	else
+		ms = INFINITE;
+	result = SleepConditionVariableCS_fn(cond, lock, ms);
+	if (result) {
+		if (GetLastError() == WAIT_TIMEOUT)
+			return 1;
+		else
+			return -1;
+	} else {
+		return 0;
+	}
+}
+#endif
+
+struct evthread_win32_cond {
+	HANDLE event;
+
+	CRITICAL_SECTION lock;
+	int n_waiting;
+	int n_to_wake;
+	int generation;
+};
+
+static void *
+evthread_win32_cond_alloc(unsigned flags)
+{
+	struct evthread_win32_cond *cond;
+	if (!(cond = mm_malloc(sizeof(struct evthread_win32_cond))))
+		return NULL;
+	if (InitializeCriticalSectionAndSpinCount(&cond->lock, SPIN_COUNT)==0) {
+		mm_free(cond);
+		return NULL;
+	}
+	if ((cond->event = CreateEvent(NULL,TRUE,FALSE,NULL)) == NULL) {
+		DeleteCriticalSection(&cond->lock);
+		mm_free(cond);
+		return NULL;
+	}
+	cond->n_waiting = cond->n_to_wake = cond->generation = 0;
+	return cond;
+}
+
+static void
+evthread_win32_cond_free(void *cond_)
+{
+	struct evthread_win32_cond *cond = cond_;
+	DeleteCriticalSection(&cond->lock);
+	CloseHandle(cond->event);
+	mm_free(cond);
+}
+
+static int
+evthread_win32_cond_signal(void *cond_, int broadcast)
+{
+	struct evthread_win32_cond *cond = cond_;
+	EnterCriticalSection(&cond->lock);
+	if (broadcast)
+		cond->n_to_wake = cond->n_waiting;
+	else
+		++cond->n_to_wake;
+	cond->generation++;
+	SetEvent(cond->event);
+	LeaveCriticalSection(&cond->lock);
+	return 0;
+}
+
+static int
+evthread_win32_cond_wait(void *cond_, void *lock_, const struct timeval *tv)
+{
+	struct evthread_win32_cond *cond = cond_;
+	CRITICAL_SECTION *lock = lock_;
+	int generation_at_start;
+	int waiting = 1;
+	int result = -1;
+	DWORD ms = INFINITE, ms_orig = INFINITE, startTime, endTime;
+	if (tv)
+		ms_orig = ms = evutil_tv_to_msec_(tv);
+
+	EnterCriticalSection(&cond->lock);
+	++cond->n_waiting;
+	generation_at_start = cond->generation;
+	LeaveCriticalSection(&cond->lock);
+
+	LeaveCriticalSection(lock);
+
+	startTime = GetTickCount();
+	do {
+		DWORD res;
+		res = WaitForSingleObject(cond->event, ms);
+		EnterCriticalSection(&cond->lock);
+		if (cond->n_to_wake &&
+		    cond->generation != generation_at_start) {
+			--cond->n_to_wake;
+			--cond->n_waiting;
+			result = 0;
+			waiting = 0;
+			goto out;
+		} else if (res != WAIT_OBJECT_0) {
+			result = (res==WAIT_TIMEOUT) ? 1 : -1;
+			--cond->n_waiting;
+			waiting = 0;
+			goto out;
+		} else if (ms != INFINITE) {
+			endTime = GetTickCount();
+			if (startTime + ms_orig <= endTime) {
+				result = 1; /* Timeout */
+				--cond->n_waiting;
+				waiting = 0;
+				goto out;
+			} else {
+				ms = startTime + ms_orig - endTime;
+			}
+		}
+		/* If we make it here, we are still waiting. */
+		if (cond->n_to_wake == 0) {
+			/* There is nobody else who should wake up; reset
+			 * the event. */
+			ResetEvent(cond->event);
+		}
+	out:
+		LeaveCriticalSection(&cond->lock);
+	} while (waiting);
+
+	EnterCriticalSection(lock);
+
+	EnterCriticalSection(&cond->lock);
+	if (!cond->n_waiting)
+		ResetEvent(cond->event);
+	LeaveCriticalSection(&cond->lock);
+
+	return result;
+}
+
+int
+evthread_use_windows_threads(void)
+{
+	struct evthread_lock_callbacks cbs = {
+		EVTHREAD_LOCK_API_VERSION,
+		EVTHREAD_LOCKTYPE_RECURSIVE,
+		evthread_win32_lock_create,
+		evthread_win32_lock_free,
+		evthread_win32_lock,
+		evthread_win32_unlock
+	};
+
+
+	struct evthread_condition_callbacks cond_cbs = {
+		EVTHREAD_CONDITION_API_VERSION,
+		evthread_win32_cond_alloc,
+		evthread_win32_cond_free,
+		evthread_win32_cond_signal,
+		evthread_win32_cond_wait
+	};
+#ifdef WIN32_HAVE_CONDITION_VARIABLES
+	struct evthread_condition_callbacks condvar_cbs = {
+		EVTHREAD_CONDITION_API_VERSION,
+		evthread_win32_condvar_alloc,
+		evthread_win32_condvar_free,
+		evthread_win32_condvar_signal,
+		evthread_win32_condvar_wait
+	};
+#endif
+
+	evthread_set_lock_callbacks(&cbs);
+	evthread_set_id_callback(evthread_win32_get_id);
+#ifdef WIN32_HAVE_CONDITION_VARIABLES
+	if (evthread_win32_condvar_init()) {
+		evthread_set_condition_callbacks(&condvar_cbs);
+		return 0;
+	}
+#endif
+	evthread_set_condition_callbacks(&cond_cbs);
+
+	return 0;
+}
+
diff --git a/contrib/libs/libevent/win32select.c b/contrib/libs/libevent/win32select.c
new file mode 100644
index 00000000000..d005b587d45
--- /dev/null
+++ b/contrib/libs/libevent/win32select.c
@@ -0,0 +1,389 @@
+/*
+ * Copyright 2007-2012 Niels Provos and Nick Mathewson
+ * Copyright 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright 2003 Michael A. Davis <mike@datanerds.net>
+ *
+ * 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"
+
+#ifdef _WIN32
+
+#include <winsock2.h>
+#include <windows.h>
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "event2/util.h"
+#include "util-internal.h"
+#include "log-internal.h"
+#include "event2/event.h"
+#include "event-internal.h"
+#include "evmap-internal.h"
+#include "event2/thread.h"
+#include "evthread-internal.h"
+#include "time-internal.h"
+
+#define XFREE(ptr) do { if (ptr) mm_free(ptr); } while (0)
+
+extern struct event_list timequeue;
+extern struct event_list addqueue;
+
+struct win_fd_set {
+	unsigned int fd_count;
+	SOCKET fd_array[1];
+};
+
+/* MSDN says this is required to handle SIGFPE */
+volatile double SIGFPE_REQ = 0.0f;
+
+struct idx_info {
+	int read_pos_plus1;
+	int write_pos_plus1;
+};
+
+struct win32op {
+	unsigned num_fds_in_fd_sets;
+	int resize_out_sets;
+	struct win_fd_set *readset_in;
+	struct win_fd_set *writeset_in;
+	struct win_fd_set *readset_out;
+	struct win_fd_set *writeset_out;
+	struct win_fd_set *exset_out;
+	unsigned signals_are_broken : 1;
+};
+
+static void *win32_init(struct event_base *);
+static int win32_add(struct event_base *, evutil_socket_t, short old, short events, void *idx_);
+static int win32_del(struct event_base *, evutil_socket_t, short old, short events, void *idx_);
+static int win32_dispatch(struct event_base *base, struct timeval *);
+static void win32_dealloc(struct event_base *);
+
+struct eventop win32ops = {
+	"win32",
+	win32_init,
+	win32_add,
+	win32_del,
+	win32_dispatch,
+	win32_dealloc,
+	0, /* doesn't need reinit */
+	0, /* No features supported. */
+	sizeof(struct idx_info),
+};
+
+#define FD_SET_ALLOC_SIZE(n) ((sizeof(struct win_fd_set) + ((n)-1)*sizeof(SOCKET)))
+
+static int
+grow_fd_sets(struct win32op *op, unsigned new_num_fds)
+{
+	size_t size;
+
+	EVUTIL_ASSERT(new_num_fds >= op->readset_in->fd_count &&
+	       new_num_fds >= op->writeset_in->fd_count);
+	EVUTIL_ASSERT(new_num_fds >= 1);
+
+	size = FD_SET_ALLOC_SIZE(new_num_fds);
+	if (!(op->readset_in = mm_realloc(op->readset_in, size)))
+		return (-1);
+	if (!(op->writeset_in = mm_realloc(op->writeset_in, size)))
+		return (-1);
+	op->resize_out_sets = 1;
+	op->num_fds_in_fd_sets = new_num_fds;
+	return (0);
+}
+
+static int
+do_fd_set(struct win32op *op, struct idx_info *ent, evutil_socket_t s, int read)
+{
+	struct win_fd_set *set = read ? op->readset_in : op->writeset_in;
+	if (read) {
+		if (ent->read_pos_plus1 > 0)
+			return (0);
+	} else {
+		if (ent->write_pos_plus1 > 0)
+			return (0);
+	}
+	if (set->fd_count == op->num_fds_in_fd_sets) {
+		if (grow_fd_sets(op, op->num_fds_in_fd_sets*2))
+			return (-1);
+		/* set pointer will have changed and needs reiniting! */
+		set = read ? op->readset_in : op->writeset_in;
+	}
+	set->fd_array[set->fd_count] = s;
+	if (read)
+		ent->read_pos_plus1 = set->fd_count+1;
+	else
+		ent->write_pos_plus1 = set->fd_count+1;
+	return (set->fd_count++);
+}
+
+static int
+do_fd_clear(struct event_base *base,
+			struct win32op *op, struct idx_info *ent, int read)
+{
+	int i;
+	struct win_fd_set *set = read ? op->readset_in : op->writeset_in;
+	if (read) {
+		i = ent->read_pos_plus1 - 1;
+		ent->read_pos_plus1 = 0;
+	} else {
+		i = ent->write_pos_plus1 - 1;
+		ent->write_pos_plus1 = 0;
+	}
+	if (i < 0)
+		return (0);
+	if (--set->fd_count != (unsigned)i) {
+		struct idx_info *ent2;
+		SOCKET s2;
+		s2 = set->fd_array[i] = set->fd_array[set->fd_count];
+
+		ent2 = evmap_io_get_fdinfo_(&base->io, s2);
+
+		if (!ent2) /* This indicates a bug. */
+			return (0);
+		if (read)
+			ent2->read_pos_plus1 = i+1;
+		else
+			ent2->write_pos_plus1 = i+1;
+	}
+	return (0);
+}
+
+#define NEVENT 32
+void *
+win32_init(struct event_base *base)
+{
+	struct win32op *winop;
+	size_t size;
+	if (!(winop = mm_calloc(1, sizeof(struct win32op))))
+		return NULL;
+	winop->num_fds_in_fd_sets = NEVENT;
+	size = FD_SET_ALLOC_SIZE(NEVENT);
+	if (!(winop->readset_in = mm_malloc(size)))
+		goto err;
+	if (!(winop->writeset_in = mm_malloc(size)))
+		goto err;
+	if (!(winop->readset_out = mm_malloc(size)))
+		goto err;
+	if (!(winop->writeset_out = mm_malloc(size)))
+		goto err;
+	if (!(winop->exset_out = mm_malloc(size)))
+		goto err;
+	winop->readset_in->fd_count = winop->writeset_in->fd_count = 0;
+	winop->readset_out->fd_count = winop->writeset_out->fd_count
+		= winop->exset_out->fd_count = 0;
+
+	if (evsig_init_(base) < 0)
+		winop->signals_are_broken = 1;
+
+	evutil_weakrand_seed_(&base->weakrand_seed, 0);
+
+	return (winop);
+ err:
+	XFREE(winop->readset_in);
+	XFREE(winop->writeset_in);
+	XFREE(winop->readset_out);
+	XFREE(winop->writeset_out);
+	XFREE(winop->exset_out);
+	XFREE(winop);
+	return (NULL);
+}
+
+int
+win32_add(struct event_base *base, evutil_socket_t fd,
+			 short old, short events, void *idx_)
+{
+	struct win32op *win32op = base->evbase;
+	struct idx_info *idx = idx_;
+
+	if ((events & EV_SIGNAL) && win32op->signals_are_broken)
+		return (-1);
+
+	if (!(events & (EV_READ|EV_WRITE)))
+		return (0);
+
+	event_debug(("%s: adding event for %d", __func__, (int)fd));
+	if (events & EV_READ) {
+		if (do_fd_set(win32op, idx, fd, 1)<0)
+			return (-1);
+	}
+	if (events & EV_WRITE) {
+		if (do_fd_set(win32op, idx, fd, 0)<0)
+			return (-1);
+	}
+	return (0);
+}
+
+int
+win32_del(struct event_base *base, evutil_socket_t fd, short old, short events,
+		  void *idx_)
+{
+	struct win32op *win32op = base->evbase;
+	struct idx_info *idx = idx_;
+
+	event_debug(("%s: Removing event for "EV_SOCK_FMT,
+		__func__, EV_SOCK_ARG(fd)));
+	if (events & EV_READ)
+		do_fd_clear(base, win32op, idx, 1);
+	if (events & EV_WRITE)
+		do_fd_clear(base, win32op, idx, 0);
+
+	return 0;
+}
+
+static void
+fd_set_copy(struct win_fd_set *out, const struct win_fd_set *in)
+{
+	out->fd_count = in->fd_count;
+	memcpy(out->fd_array, in->fd_array, in->fd_count * (sizeof(SOCKET)));
+}
+
+/*
+  static void dump_fd_set(struct win_fd_set *s)
+  {
+  unsigned int i;
+  printf("[ ");
+  for(i=0;i<s->fd_count;++i)
+  printf("%d ",(int)s->fd_array[i]);
+  printf("]\n");
+  }
+*/
+
+int
+win32_dispatch(struct event_base *base, struct timeval *tv)
+{
+	struct win32op *win32op = base->evbase;
+	int res = 0;
+	unsigned j, i;
+	int fd_count;
+	SOCKET s;
+
+	if (win32op->resize_out_sets) {
+		size_t size = FD_SET_ALLOC_SIZE(win32op->num_fds_in_fd_sets);
+		if (!(win32op->readset_out = mm_realloc(win32op->readset_out, size)))
+			return (-1);
+		if (!(win32op->exset_out = mm_realloc(win32op->exset_out, size)))
+			return (-1);
+		if (!(win32op->writeset_out = mm_realloc(win32op->writeset_out, size)))
+			return (-1);
+		win32op->resize_out_sets = 0;
+	}
+
+	fd_set_copy(win32op->readset_out, win32op->readset_in);
+	fd_set_copy(win32op->exset_out, win32op->writeset_in);
+	fd_set_copy(win32op->writeset_out, win32op->writeset_in);
+
+	fd_count =
+	    (win32op->readset_out->fd_count > win32op->writeset_out->fd_count) ?
+	    win32op->readset_out->fd_count : win32op->writeset_out->fd_count;
+
+	if (!fd_count) {
+		long msec = tv ? evutil_tv_to_msec_(tv) : LONG_MAX;
+		/* Sleep's DWORD argument is unsigned long */
+		if (msec < 0)
+			msec = LONG_MAX;
+		/* Windows doesn't like you to call select() with no sockets */
+		Sleep(msec);
+		return (0);
+	}
+
+	EVBASE_RELEASE_LOCK(base, th_base_lock);
+
+	res = select(fd_count,
+		     (struct fd_set*)win32op->readset_out,
+		     (struct fd_set*)win32op->writeset_out,
+		     (struct fd_set*)win32op->exset_out, tv);
+
+	EVBASE_ACQUIRE_LOCK(base, th_base_lock);
+
+	event_debug(("%s: select returned %d", __func__, res));
+
+	if (res <= 0) {
+		event_debug(("%s: %s", __func__,
+		    evutil_socket_error_to_string(EVUTIL_SOCKET_ERROR())));
+		return res;
+	}
+
+	if (win32op->readset_out->fd_count) {
+		i = evutil_weakrand_range_(&base->weakrand_seed,
+		    win32op->readset_out->fd_count);
+		for (j=0; j<win32op->readset_out->fd_count; ++j) {
+			if (++i >= win32op->readset_out->fd_count)
+				i = 0;
+			s = win32op->readset_out->fd_array[i];
+			evmap_io_active_(base, s, EV_READ);
+		}
+	}
+	if (win32op->exset_out->fd_count) {
+		i = evutil_weakrand_range_(&base->weakrand_seed,
+		    win32op->exset_out->fd_count);
+		for (j=0; j<win32op->exset_out->fd_count; ++j) {
+			if (++i >= win32op->exset_out->fd_count)
+				i = 0;
+			s = win32op->exset_out->fd_array[i];
+			evmap_io_active_(base, s, EV_WRITE);
+		}
+	}
+	if (win32op->writeset_out->fd_count) {
+		i = evutil_weakrand_range_(&base->weakrand_seed,
+		    win32op->writeset_out->fd_count);
+		for (j=0; j<win32op->writeset_out->fd_count; ++j) {
+			if (++i >= win32op->writeset_out->fd_count)
+				i = 0;
+			s = win32op->writeset_out->fd_array[i];
+			evmap_io_active_(base, s, EV_WRITE);
+		}
+	}
+	return (0);
+}
+
+void
+win32_dealloc(struct event_base *base)
+{
+	struct win32op *win32op = base->evbase;
+
+	evsig_dealloc_(base);
+	if (win32op->readset_in)
+		mm_free(win32op->readset_in);
+	if (win32op->writeset_in)
+		mm_free(win32op->writeset_in);
+	if (win32op->readset_out)
+		mm_free(win32op->readset_out);
+	if (win32op->writeset_out)
+		mm_free(win32op->writeset_out);
+	if (win32op->exset_out)
+		mm_free(win32op->exset_out);
+	/* XXXXX free the tree. */
+
+	memset(win32op, 0, sizeof(*win32op));
+	mm_free(win32op);
+}
+
+#endif