summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorRemko Tronçon <git@el-tramo.be>2009-12-03 20:06:33 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-12-03 20:06:33 (GMT)
commit5df50c35e1baeee517a0895a2c8a2cc2052b087f (patch)
treeb9d90fd123ec251ebb930cfcfaa2ffc805433812 /3rdParty/CAres/src/ares_fds.c
parent9b3edba27b8683f1a87ad66ee05802dd93bbbdfc (diff)
downloadswift-5df50c35e1baeee517a0895a2c8a2cc2052b087f.zip
swift-5df50c35e1baeee517a0895a2c8a2cc2052b087f.tar.bz2
Added C-Ares.
Diffstat (limited to '3rdParty/CAres/src/ares_fds.c')
-rw-r--r--3rdParty/CAres/src/ares_fds.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/3rdParty/CAres/src/ares_fds.c b/3rdParty/CAres/src/ares_fds.c
new file mode 100644
index 0000000..6ffe9c7
--- /dev/null
+++ b/3rdParty/CAres/src/ares_fds.c
@@ -0,0 +1,63 @@
+/* $Id: ares_fds.c,v 1.12 2009-11-02 11:55:53 yangtse Exp $ */
+
+/* Copyright 1998 by the Massachusetts Institute of Technology.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is"
+ * without express or implied warranty.
+ */
+
+#include "ares_setup.h"
+
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+#include "ares.h"
+#include "ares_private.h"
+
+int ares_fds(ares_channel channel, fd_set *read_fds, fd_set *write_fds)
+{
+ struct server_state *server;
+ ares_socket_t nfds;
+ int i;
+
+ /* Are there any active queries? */
+ int active_queries = !ares__is_list_empty(&(channel->all_queries));
+
+ nfds = 0;
+ for (i = 0; i < channel->nservers; i++)
+ {
+ server = &channel->servers[i];
+ /* We only need to register interest in UDP sockets if we have
+ * outstanding queries.
+ */
+ if (active_queries && server->udp_socket != ARES_SOCKET_BAD)
+ {
+ FD_SET(server->udp_socket, read_fds);
+ if (server->udp_socket >= nfds)
+ nfds = server->udp_socket + 1;
+ }
+ /* We always register for TCP events, because we want to know
+ * when the other side closes the connection, so we don't waste
+ * time trying to use a broken connection.
+ */
+ if (server->tcp_socket != ARES_SOCKET_BAD)
+ {
+ FD_SET(server->tcp_socket, read_fds);
+ if (server->qhead)
+ FD_SET(server->tcp_socket, write_fds);
+ if (server->tcp_socket >= nfds)
+ nfds = server->tcp_socket + 1;
+ }
+ }
+ return (int)nfds;
+}