Squashed 'third_party/libevent/' content from commit d8ceae8
Change-Id: I84e1b23561eb225b9f288717b028e6bc9e5a27e1
git-subtree-dir: third_party/libevent
git-subtree-split: d8ceae81b83f3d0a56e2f41d4c429b2702a8e302
diff --git a/bufferevent_async.c b/bufferevent_async.c
new file mode 100644
index 0000000..f34ca5f
--- /dev/null
+++ b/bufferevent_async.c
@@ -0,0 +1,690 @@
+/*
+ * 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"
+
+#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 <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,
+ be_async_destruct,
+ _bufferevent_generic_adj_timeouts,
+ be_async_flush,
+ be_async_ctrl,
+};
+
+static inline struct bufferevent_async *
+upcast(struct bufferevent *bev)
+{
+ struct bufferevent_async *bev_a;
+ if (bev->be_ops != &bufferevent_ops_async)
+ 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;
+ _bufferevent_run_eventcb(bev, BEV_EVENT_ERROR);
+ } 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;
+ _bufferevent_run_eventcb(bev, BEV_EVENT_ERROR);
+ 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 (bev_p->options & BEV_OPT_CLOSE_ON_FREE) {
+ /* XXXX possible double-close */
+ evutil_closesocket(fd);
+ }
+ /* delete this in case non-blocking connect was used */
+ if (event_initialized(&bev->ev_write)) {
+ event_del(&bev->ev_write);
+ _bufferevent_del_generic_timeout_cbs(bev);
+ }
+}
+
+/* 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);
+
+ _bufferevent_run_eventcb(bev,
+ ok? BEV_EVENT_CONNECTED : BEV_EVENT_ERROR);
+
+ 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);
+ if (evbuffer_get_length(bev->input) >= bev->wm_read.low)
+ _bufferevent_run_readcb(bev);
+ bev_async_consider_reading(bev_a);
+ } else if (!ok) {
+ what |= BEV_EVENT_ERROR;
+ bev_a->ok = 0;
+ _bufferevent_run_eventcb(bev, what);
+ } else if (!nbytes) {
+ what |= BEV_EVENT_EOF;
+ bev_a->ok = 0;
+ _bufferevent_run_eventcb(bev, what);
+ }
+ }
+
+ _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);
+ if (evbuffer_get_length(bev->output) <=
+ bev->wm_write.low)
+ _bufferevent_run_writecb(bev);
+ bev_async_consider_writing(bev_a);
+ } else if (!ok) {
+ what |= BEV_EVENT_ERROR;
+ bev_a->ok = 0;
+ _bufferevent_run_eventcb(bev, what);
+ } else if (!nbytes) {
+ what |= BEV_EVENT_EOF;
+ bev_a->ok = 0;
+ _bufferevent_run_eventcb(bev, what);
+ }
+ }
+
+ _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) {
+ int err = GetLastError();
+ /* We may have alrady associated this fd with a port.
+ * Let's hope it's this port, and that the error code
+ * for doing this neer changes. */
+ if (err != ERROR_INVALID_PARAMETER)
+ 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);
+
+ bev_a->ok = fd >= 0;
+ if (bev_a->ok)
+ _bufferevent_init_generic_timeout_cbs(bev);
+
+ 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;
+ _bufferevent_init_generic_timeout_cbs(bev);
+ /* 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 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)
+ return -1;
+ _evbuffer_overlapped_set_fd(bev->input, data->fd);
+ _evbuffer_overlapped_set_fd(bev->output, data->fd);
+ 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)INVALID_SOCKET &&
+ (bev_a->bev.options & BEV_OPT_CLOSE_ON_FREE)) {
+ closesocket(fd);
+ }
+ bev_a->ok = 0;
+ return 0;
+ }
+ case BEV_CTRL_GET_UNDERLYING:
+ default:
+ return -1;
+ }
+}
+
+